40,579 results on '"Conservation biology"'
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2. Making Ends Meet: Understanding How Circular Economy Can Contribute to Long-Term Ecosystem Restoration and Biodiversity Conservation
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Tiwari, Chandranshu, Bhatnagar, Sonal, Kumari, Reeta, Singh, Pardeep, editor, Srivastava, Prateek, editor, and Sorokin, Alexander, editor
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- 2025
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3. Spring drought as a possible cause for disappearance of native Metasequoia in Yunnan Province, China: Evidence from seed germination and seedling growth
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Fan, Yukun, Wang, Li, Su, Tao, and Lan, Qinying
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- 2020
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4. Roof of the world: Home and border in the genomic era.
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Da, Wa, Rana, Suresh K., Bawa, Kamal, Kunte, Krushnamegh, and Wang, Zhengyang
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TRADITIONAL ecological knowledge , *CONSERVATION biology , *INDIGENOUS peoples , *GLACIAL melting , *BIODIVERSITY - Abstract
Himalaya and the Tibetan Plateau, known as the 'land of snow' and the 'roof of the world', is home to tens of millions of indigenous people who live with a staggering amount of biological diversity. In the past decade scientists have applied genomic tools and methods to substantially advance the understanding of phylogeography and genetic mechanisms behind high‐elevation adaptation of local biota. However, contributions from indigenous researchers and native institutions are underrepresented in this scientific endeavour. We point to the higher degree of indigenous contribution within the discipline of conservation biology and how recognizing the prominence of traditional ecological knowledge (TEK) could deliver keen molecular ecological insights. Since the Himalaya‐Tibet ecological interface spans five countries, comprehensive biogeographical and phylogeographical taxon sampling in the region requires multi‐national collaborations across indigenous lands as well as indigenous community participation at both national and international levels. For the next generation of indigenous molecular ecologists, researching and cataloguing the evolutionary history and genetic information of the Tibetan and Himalayan landscape is a race against the melting glacier. At the roof of the world, their scientific judgement and stewardship will have environmental impacts that percolate far beyond indigenous lands. [ABSTRACT FROM AUTHOR]
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- 2025
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5. Investigation of introgressive hybridization in endangered Sinohyriopsis mussels (Mollusca: Unionidae) using genome-wide data in Japan.
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Ishii, Yasuto, Kawamoto, Youdai, Shirai, Akihisa, Saito, Takumi, Yamazaki, Daishi, Ye, Bin, Ito, Shun, Kondo, Takaki, Hirano, Takahiro, Chiba, Satoshi, and Sano, Isao
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SINGLE nucleotide polymorphisms ,ENVIRONMENTAL management ,LIFE sciences ,ENVIRONMENTAL sciences ,CONSERVATION biology ,INTROGRESSION (Genetics) - Abstract
Anthropogenic hybridization is a global phenomenon and a major concern in conservation biology. Sinohyriopsis schlegelii (Mollusca: Bivalvia: Unionidae), native to Lake Biwa in Japan, is considered endangered because of its hybridization with an introduced Chinese species, S. cumingii. Although previous research suggested hybridization among Sinohyriopsis mussels, the research has failed to (1) evaluate the prevalence of hybrids, (2) predict the genetic consequences for populations containing hybrids, and (3) genetically assess a population devoid of hybrids. This study aimed to fill the knowledge gaps. We collected samples from all persistent populations in Lake Biwa, Lake Kasumigaura, and Lake Anenuma (the latter two populations were introduced from Lake Biwa) and analyzed genome-wide single nucleotide polymorphisms (SNPs) data. Our findings demonstrate that hybrids are prevalent in Lake Biwa and Lake Kasumigaura but absent in Lake Anenuma. The proportion of S. cumingii ancestry increased over the past 20 years, indicating that the genetic material of S. schlegelii may diminish further in the future. Moreover, the S. schlegelii population in Lake Anenuma shared genetic similarities with the pre-hybridization population of Lake Biwa. Although the Lake Anenuma population exhibited lower genetic diversity, no signs of inbreeding were observed. Overall, the Lake Anenuma population remains the only genetically pure S. schlegelii population, but its low genetic diversity indicates a reduced adaptive potential to environmental changes. This study provides valuable insights into the current genetic status of S. schlegelii, ultimately informing conservation efforts for this critically endangered species. [ABSTRACT FROM AUTHOR]
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- 2025
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6. Listening Beyond the Human: The Autonomous Recording Unit and the Ethics of Sound in Biodiversity Conservation.
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Vallee, Mickey
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ENVIRONMENTAL degradation ,ENVIRONMENTAL sciences ,SENSOR networks ,ENVIRONMENTAL protection ,CONSERVATION biology ,BIODIVERSITY conservation - Abstract
Sound technologies and sound sensor networks play a crucial role in our understanding of biodiversity loss in conservation biology and the environmental sciences. Among these technologies, the autonomous recording unit (ARU) has been widely used for studying longitudinal biodiversity loss. This article draws on fieldwork conducted in 2016 and 2017 at a bioacoustics research laboratory to explore the significance of the ARU, developed by Wildlife Acoustics, as the central component of the research network for biodiversity conservation. While it is commonly acknowledged in Science and Technology Studies (STS) that research instruments are not neutral data collectors, this article examines how the ARU is deployed and programmed, and how it transcends the limitations of human-centered listening by (a) shifting the focus away from the perceiving human subject and (b) promoting a global ethic of response and responsibility as sound becomes more democratized in scientific practices. [ABSTRACT FROM AUTHOR]
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- 2025
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7. Inconspicuous taxa in citizen science-based botanical research: actual contribution, limitations, and new opportunities for non-vascular cryptogams.
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Cerrejón, Carlos, Noualhaguet, Marion, Fenton, Nicole J., Indorf, Marc-Frédéric, and Feldman, Mariano J.
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ALGAL communities ,CRYPTOGAMS ,FUNGAL communities ,CONSERVATION biology ,VASCULAR plants - Abstract
Citizen science (CS) has gathered an impressive wealth of open biodiversity data over the last decade, with demonstrated significant scientific contributions in biology and conservation science. However, the contribution of CS in botanical research, and more particularly regarding inconspicuous taxonomic groups such as cryptogams remains largely unexplored. Here we assess the current status and contribution of CS in botanical research, with a special focus on non-vascular "cryptogams" (bryophytes, lichens, fungi, and algae). We conducted a literature review for the period 2012 to 2022 to synthesize the use of CS in botanical studies. We found an increasing trend in the use of CS for botanical research (average annual increase of ∼40%), although highly biased towards vascular plants (246 papers). Cryptogams remained strongly underrepresented (58 papers), although receiving slightly growing attention since 2018. The inconspicuousness nature, high diversity, challenges with species identification, and low public perception of cryptogams not only restrict the contribution made by non-experts but raise concerns about the reliability and robustness of generated data. This is fueled by the scarcity of foundational methodological studies in cryptogams, which seems to undermine the scientific confidence in engaging volunteers for their research or using open data from CS platforms and tools. Despite this, our review showed a gradual adoption of CS approaches for cryptogam research, which is particularly led by mycologists. We highlight the versatility and potential of CS approaches for advancing cryptogam knowledge across various research subjects at spatial and temporal scales otherwise unfathomable by researchers, and provide insights on the opportunities of application and possible solutions to the discussed limitations. We hope our work motivates mycologists, phycologists, bryologists, and lichenologists to further embrace CS, and increase public awareness on these highly sensitive and ecologically important taxa. [ABSTRACT FROM AUTHOR]
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- 2025
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8. Fish gut microbiome and its application in aquaculture and biological conservation.
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Kanika, Nusrat Hasan, Liaqat, Nusrat, Chen, Huifan, Ke, Jing, Lu, Guoqing, Wang, Jun, and Wang, Chenghui
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CONSERVATION biology ,EFFECT of environment on fishes ,SUSTAINABLE aquaculture ,FISH farming ,SUSTAINABILITY ,AQUATIC biodiversity - Abstract
Understanding the diversity and function of fish gut microbiomes has advanced substantially, yet many aspects remain poorly understood, particularly the interplay among microbiota, host species, and environmental factors in the context of conservation. This review explores the composition and abundance of gut bacterial communities in key aquaculture fish groups—cyprinids, ictalurids (catfish), salmonids, and cichlids (tilapia)—alongside the model organism zebrafish, across diverse geographic regions. The findings highlight environmental habitats and host species as primary determinants of gut microbiome structure, offering a global perspective on these microbial communities. Across all fish groups, the phyla Firmicutes, Fusobacteria, and Proteobacteria consistently dominated, while temperate, sub-equatorial, and sub-tropical regions exhibited the highest microbiome diversity, underscoring the contribution of taxonomic and environmental factors. The gut bacterial diversity of farm-raised fish shows a significant divergence from that of wild-caught fish, reflecting the impacts of ecological and management differences. Understanding the dynamic responses of fish gut microbiota is vital for guiding conservation efforts, safeguarding aquatic biodiversity, and advancing sustainable aquaculture practices. Future research should leverage innovative techniques and integrative approaches, both experimental and theoretical, to uncover the functional roles of microbiomes and predict their responses to environmental changes. Expanding geographic and taxonomic coverage will be critical for creating a comprehensive framework to inform global aquaculture and conservation strategies. Collectively, this perspective highlights the transformative potential of microbiome research in addressing global challenges in aquaculture and conservation biology. [ABSTRACT FROM AUTHOR]
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- 2025
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9. A review of age estimation methods in non‐avian reptiles by growth marks in hard tissues.
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SZÉKELY, Diana, STĂNESCU, Florina, SZÉKELY, Paul, TELEA, Alexandra E., and COGĂLNICEANU, Dan
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SKELETOCHRONOLOGY , *EVIDENCE gaps , *POPULATION ecology , *CONSERVATION biology , *PARAMETERS (Statistics) - Abstract
Age and growth‐related data are basic biological parameters, essential in population ecology, evolution, and conservation biology. There is a growing body of published information on reptile demography derived from sclerochronology, a technique based on counting the growth layers deposited in bones (skeletochronology) and other hard body structures. Since the data are not always easily available, we compiled the existing published data, described the current status of knowledge, synthetized the conclusions of disparate studies, and identified patterns of research and information gaps, prioritizing the needs for future research. Our database includes the results of 468 published studies covering 236 reptile species from 41 families. These represent less than 2% of the total number of known extant species. Turtles and crocodiles are proportionally better studied, while snakes are the least examined group. The distribution of the research does not reflect conservation needs; we found an important geographic bias, with an overrepresentation of Northern temperate species. Only 23% of the studies checked the assumption of periodicity of growth marks deposition, and the method was found to be reliable or adequate in 79% of the cases. Overall, the data obtained through sclerochronology can be considered robust, especially if validation methods are employed, since the general goal is to characterize population parameters, trends, and dynamics, rather than determining the exact age of any specimen in particular. [ABSTRACT FROM AUTHOR]
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- 2025
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10. Why Is It Too Cold? Towards a Mechanistic Understanding of Cold‐Water Pollution Effects on Recruitment of an Imperiled Warmwater Fish.
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Gilbert, Eliza I., Diver, Tracy A., Mussmann, Steven M., Saltzgiver, Melody J., Knight, William K., Durst, Scott L., Farrington, Michael A., Clark Barkalow, Stephani L., Tobler, Michael, and Franssen, Nathan R.
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DEVELOPMENTAL biology , *ECOSYSTEM management , *FISH ecology , *FISH farming , *CONSERVATION biology , *FISH larvae - Abstract
Environmental temperature shapes the ontogeny of ectotherms by influencing rates of growth and development which can be key determinants of survival. Whereas the escalating impacts of water management on freshwater ecosystems is well documented, the effects of cold‐water releases from dams—which can alter downstream temperatures—remains relatively underexplored but may present novel challenges to endemic ectotherms. Specifically, little is known about how thermal depressions reshape phenotypic and genetic patterns during larval metamorphosis for fishes that evolved in warmwater systems. We assessed the effects of thermal shifts on larval ontogeny of the endangered razorback sucker (Xyrauchen texanus), which evolved in the warm waters of the Colorado River Basin, USA. We hypothesised that development is more sensitive to cold‐water influences than growth and that temperature would influence patterns in gene expression related to development. Our results supported these hypotheses and showed that both wild and laboratory‐reared larvae in slightly cooler temperatures exhibited delayed development, but similar growth compared to larvae reared in warmer conditions. These findings suggest growth and development in early ectotherm life stages can be decoupled, which follows patterns more like the temperature‐size rule than allometric scaling of development by size. We also observed transcriptional differences related to genes associated with stress responses and development in our laboratory‐reared fish; here, gene expression of fish from the coldest conditions at the end of the experiment was more similar to fish reared in warmer temperatures at the midpoint. Our findings suggest that modest temperature reductions can delay ontogeny and alter the transcriptional landscape while not necessarily limiting growth. This finding highlights the need for conservation practitioners to consider cascading impacts that even small temperature reductions can cause in riverine ecosystems. [ABSTRACT FROM AUTHOR]
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- 2025
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11. Catch of the day: Abundance and size data of groupers (Epinephelidae) and combers (Serranidae) from Middle to Late Holocene Levantine archaeological contexts.
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Winter, Rachel, Desiderà, Elena, Guidetti, Paolo, Vermeersch, Shyama, Demirel, Nazli, and Çakırlar, Canan
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Groupers (Epinephelidae) are ecologically, commercially, and culturally important carnivorous fishes found throughout the world's tropical, subtropical, and temperate coastal marine waters. Due to various life history traits (e.g., late maturity, sequential hermaphroditism) and behavior (e.g., sedentary, small home ranges) groupers are susceptible to overfishing, including small-scale and recreational fishing (especially spearfishing), and their populations are declining worldwide. The eastern Mediterranean coast, home to some of the world's longest continuously occupied urban settlements, hosts important but declining grouper populations. This paper investigates how grouper and comber (fishes in the Serranidae family with similar ecology and osteomorphology, but smaller in size) abundance and catch size changed in the eastern Mediterranean from the Middle to Late Holocene, coinciding with early coastal urbanization, by estimating their relative frequency and reconstructing their size. Size reconstructions have been done from a large sample of bones (Number of Identified Specimens = 1851) recovered from Kinet Höyük in Turkey, and Tell Fadous-Kfarabida and Tell el-Burak in Lebanon, habitation sites along the Levantine coast. Our results imply that groupers in the past reached >100 cm more often than is observed today in areas open to commercial fishing. Furthermore, the apparent lack of large groupers by the Hellenistic Period at Kinet Höyük suggests fishing efforts were intense enough to have either had an appreciable effect on the size structure of local grouper populations or brought about a behavioral change to the fishes of moving to deeper waters. [ABSTRACT FROM AUTHOR]
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- 2025
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12. Reproductive strategies in loggerhead sea turtle Caretta caretta: polyandry and polygyny in a Southwest Atlantic rookery.
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Amorim, Laís, Chieza, Lara, Lasala, Jake A., de Souza Alves Teodoro, Sarah, Colombo, Wesley D., Barcelos, Ana Carolina, Guimarães, Paula Rodrigues Lopes, Guedes da Fonseca, João Luiz, Marcondes, Ana Claudia Jorge, Santos, Alexsandro, and Vargas, Sarah
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Sea turtles are highly migratory and predominantly inhabit oceanic environments, which poses significant challenges to the study of their life cycles. Research has traditionally focused on nesting females, utilizing nest counts and mark-recapture methods, while male behavior remains understudied. To address this gap, previous studies have analyzed the genotypes of females and hatchlings to indirectly infer male genotypes and evaluate the extent of multiple paternity within populations. Our research aimed to investigate the presence of multiple paternity in loggerhead turtle (Caretta caretta) nests for the first time in Brazil. We analyzed 534 hatchlings from 43 nests associated with 42 females during the 2017/18 to 2019/20 nesting seasons, using four highly polymorphic, species-specific microsatellite markers (nDNA). Parentage tests were conducted to reconstruct paternal genotypes and determine the rates of multiple paternity within clutches. Our results revealed that 72.09% of clutches were sired by multiple males, with contributions ranging from one to six males per clutch. Additionally, seven out of 88 males (7.95%) were found to have sired clutches from multiple females, with some males contributing to more than one clutch within and across breeding seasons. The breeding sex ratio (BSR) was calculated to be 2.09 males per female. While multiple paternity is a common phenomenon among sea turtles, this study is the first to document polyandry in loggerheads in Brazil and the first to provide evidence of polygyny in this species globally. This research establishes a crucial database for future studies in Brazil, with a focus on the BSR of the Southwest Atlantic subpopulation, offering essential insights for developing effective management strategies for this vulnerable population. [ABSTRACT FROM AUTHOR]
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- 2025
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13. Constructing age-structured matrix population models for all fishes.
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Fujiwara, Masami
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Matrix population models are essential tools in conservation biology, offering key metrics to guide species management and conservation planning. However, the development of these models is often limited by insufficient life history data, particularly for non-charismatic species. This study addresses this gap by using life history data from FishBase and the FishLife R package, complemented by size-dependent natural mortality estimates, to parameterize age-structured matrix population models applicable to most fish species. The method was applied to 30 fish species common around oil and gas platforms in the Northern Gulf of Mexico, generating seven key metrics: damping ratio, resilience, generation time, stable age distribution, reproductive value, sensitivity matrix, and elasticity matrix. The damping ratio reflects how quickly a population returns to a stable age distribution after a disturbance, while resilience indicates the speed of recovery from perturbations. Generation time captures the average age of reproduction, and the stable age distribution represents the long-term proportion of individuals in each age class. Reproductive value quantifies future reproductive potential by age class. The sensitivity matrix highlights the age-class transitions most affecting population growth, and the elasticity matrix shows the proportional influence of these factors on population growth. The results demonstrate that robust population models can be constructed with limited species-specific data and reveal notable differences in population dynamics among species. For example, species with longer generation times, like the greater barracuda (Sphyraena guachancho), have lower damping ratios, indicating prolonged transient dynamics. In contrast, species such as the round scad (Decapterus punctatus) exhibit shorter generation times and higher damping ratios, suggesting faster returns to equilibrium. These findings underscore the importance of life history variability in shaping conservation strategies. Additionally, metrics like stable age distributions and reproductive values provide insight into population structure and individual contributions to future populations, while sensitivity and elasticity matrices inform management interventions such as size limits in fisheries. By integrating extensive databases and predictive tools, this study offers a scalable approach for developing matrix population models across diverse fish species. This methodology enhances our understanding of fish population dynamics, particularly for data-deficient species, and supports more informed conservation efforts. It also promotes ecosystem-based management by enabling species comparisons through standardized metrics, contributing to the sustainability of marine ecosystems. [ABSTRACT FROM AUTHOR]
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- 2025
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14. Integrating Sr isotopes, microchemistry, and genetics to reconstruct Salmonidae species and life history.
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Salerno, Ross, Murdoch, Remi, Elmore, Joanna, Wilcox, Taylor, Hegg, Jens, Austin, Catherine S., LeMoine, Michael, Luckhurst, Jade, Fraik, Alexandra K., and Carney, Molly
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LIFE history theory , *RESTORATION ecology , *CONSERVATION biology , *LASER ablation , *STRONTIUM isotopes , *RADIOCARBON dating - Abstract
Recent approaches to fisheries research emphasize the importance of the coproduction of knowledge in building resilient and culturally mindful fisheries management frameworks. Despite widespread recognition of the need for Indigenous knowledge and historical reference points as baseline data, archaeological data are rarely included in conservation biology research designs. Here we propose a novel multiproxy method to learn from former fisheries stewards by generating archaeological data on past salmonid population parameters. We used a newly developed, high throughput qPCR (HT‐qPCR) chip, originally designed for environmental DNA (eDNA), for species identification of archaeological salmonid vertebrae. We combine this with the laser ablation split‐stream (LASS) approach to identify ocean‐migration versus freshwater residency. We test this multidisciplinary approach using both contemporary and archaeological salmonid samples and new radiocarbon dates from the Tronsdal Site on the Skagit River, Washington State, USA. This is a useful approach for extracting information about
Salmonidae species and life history diversity from archaeological remains to reconstruct historic baselines for several population parameters in anadromous species with long periods of freshwater residency. The approach outlined in this paper may be particularly useful for research investigating past fisheries dynamics, offering hundreds to thousands of years of temporal depth for modern fisheries management, harvest policies, restoration ecology, and conservation biology. [ABSTRACT FROM AUTHOR]- Published
- 2024
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15. Filling the gaps: herpetological checklist of Mayombe National Park and Cabinda Province (Angola) shed light on one of the most unexplored corners of tropical Central Africa.
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Lobón-Rovira, Javier, Baptista, Ninda L., Clark, Tyron, Verburgt, Luke, Jongsma, Gregory F. M., Conradie, Werner, Veríssimo, Luis, and Vaz Pinto, Pedro
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BIOGEOGRAPHY , *BIOLOGICAL extinction , *GENETIC barcoding , *CONSERVATION biology , *BIODIVERSITY conservation - Abstract
The global environmental crisis has reinforced the importance of improving the documentation of the geographical distributions of extant species. With this aim, species inventories of specific locations or regions are a high priority, especially so in poorly explored areas. Cabinda Province, an Angolan enclave located between the Republic of Congo and the Democratic Republic of the Congo (DRC), represents one of the most enigmatic and poorly explored areas in Africa. No detailed species inventories within its protected areas (namely, Mayombe National Park) exist. Furthermore, this region presents some of the better preserved remanent of primary moist rainforest in West Africa. Although these forests are severely threatened by logging and by the rapid social growth in the area. Therefore, we provide here the first herpetological checklist of Mayombe National Park and Cabinda Province, Angola, to shed light on this underexplored corner of Africa. To obtain the most accurate species identification, we performed detailed morphological examinations and DNA barcoding identifications. As a result, we recorded a total of 76 species of amphibians and reptiles in the area, including four new genera, 19 new distribution records for Angola, and 13 candidate species. This work also provides novel topotypic genetic material from three reptile species (i.e.,
Agama congica ,Panaspis cabindae andAtractaspis congica ), that may contribute to revise and solve taxonomic inconsistencies in these different groups. Finally, we identified areas of high species richness, as well as areas with a high number of habitat specialists, thus indicating species more vulnerable to extinction. Therefore, our study allowed us to identify areas that are of special interest for conservation of reptiles and amphibians, primarily focus on species vulnerable to extinction, but also to identify some knowledge gaps that still need further investigation. To conclude, this work not only contributes to an improved understanding of Angolan herpetofauna, but also highlights the importance of the western slope of Central Africa as an important biodiversity hotspot, centre of endemism and potential source of diversification for this group of land vertebrates. [ABSTRACT FROM AUTHOR]- Published
- 2024
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16. Conservation and coexistence at a crossroads.
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Pooley, Simon
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SOCIAL scientists , *RESTORATION ecology , *CONSERVATION biology , *SUSTAINABLE urban development , *ECOSYSTEMS , *HUMAN-animal relationships , *COEXISTENCE of species - Abstract
The article "Conservation and coexistence at a crossroads" by Simon Pooley discusses the challenges faced by conservationists in balancing the universal urge for biodiversity conservation with the recognition of diverse ways of living in the natural world. The integration of human-wildlife coexistence into the Global Biodiversity Framework highlights the need for a nuanced approach that considers cultural, social, and ecological complexities. The article emphasizes the importance of developing shared visions and principles for coexistence in specific landscapes, rather than imposing universal standards, to foster positive relationships between humans and wildlife. [Extracted from the article]
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- 2024
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17. Extreme longevity may be the rule not the exception in Balaenid whales.
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Breed, Greg A., Vermeulen, Els, and Corkeron, Peter
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BALEEN whales , *LIFE spans , *SURVIVAL analysis (Biometry) , *WHALES , *CONSERVATION biology - Abstract
We fit ongoing 40+-year mark-recapture databases from the thriving southern right whale (SRW), Eubalaena australis, and highly endangered North Atlantic right whale (NARW), Eubalaena glacialis, to candidate survival models to estimate their life spans. Median life span for SRW was 73.4 years, with 10% of individuals surviving past 131.8 years. NARW life spans were likely anthropogenically shortened, with a median life span of just 22.3 years, and 10% of individuals living past 47.2 years. In the context of extreme longevity recently documented in other whale species, we suggest that all balaenid and perhaps most great whales have an unrecognized potential for great longevity that has been masked by the demographic disruptions of industrial whaling. This unrecognized longevity has profound implication for basic biology and conservation of whales. [ABSTRACT FROM AUTHOR]
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- 2024
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18. Exploring latitudinal gradients and environmental drivers of amphipod biodiversity patterns regarding depth and habitat variations.
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Momtazi, Farzaneh and Saeedi, Hanieh
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KEYSTONE species , *LIFE sciences , *SPECIES diversity , *CONSERVATION biology , *WILDLIFE conservation - Abstract
Amphipods are known as umbrella species in conservation biology that their protection indirectly protects other species. Recent hypotheses suggest a bimodal latitudinal global species richness pattern for amphipods, irrespective of species' depth or habitat type. Phylogeographic hypotheses suggested two distinct procedures for amphipod diversification: ecological radiation and Pangea fragmentation. This study aimed to revisit the bimodal latitudinal pattern of species richness for amphipods, investigate similarities in species composition and main environmental amphipod distribution drivers regarding their depth and habitat variations. The comprehensive database was collected from open-access data and a personal sampling database from the Persian Gulf and the Gulf of Oman. After rigorous data quality controls, the final dataset comprised 1,142,416 distribution records of 6,424 accepted marine amphipod species distributed from 0 to 10,900 m depth. All the species were grouped into pelagic and benthic, shallow-water (> 200 m), and deep-sea (< 200 m). Alpha and gamma species richness and the expected number of species per 50 random samples (ES50) were calculated. Our findings showed that species richness patterns in amphipods are shaped not only by habitat types but also by depth, and they are not significantly bimodal in all groups. Also, the Beta diversity of benthic species revealed distinct diversification patterns between benthic and pelagic species. The species similarity clusters revealed a fragmentation between Gondwana and Laurasia for shallow benthic species. However, the similarity between pelagic amphipod communities is more compatible with ecological parameters. Generalized Additive Models (GAMs) highlighted that environmental variables play a significant role in species distributions, for example, temperature and chlorophyll levels were the main predictors of species richness in shallow waters. However, a complete effect of multiple environmental variables is responsible for deep-sea species gradients. These findings are crucial information to be considered when managing the species richness and establishing conservation priorities for their habitats. [ABSTRACT FROM AUTHOR]
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- 2024
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19. What Can Genome Sequence Data Reveal About Population Viability?
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Kardos, Marty, Keller, Lukas F., and Funk, W. Chris
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GENETIC load , *GENETIC variation , *BIOLOGISTS , *GENOMICS , *CONSERVATION biology , *INBREEDING - Abstract
ABSTRACT Biologists have long sought to understand the impacts of deleterious genetic variation on fitness and population viability. However, our understanding of these effects in the wild is incomplete, in part due to the rarity of sufficient genetic and demographic data needed to measure their impact. The genomics revolution is promising a potential solution by predicting the effects of deleterious genetic variants (genetic load) bioinformatically from genome sequences alone bypassing the need for costly demographic data. After a historical perspective on the theoretical and empirical basis of our understanding of the dynamics and fitness effects of deleterious genetic variation, we evaluate the potential for these new genomic measures of genetic load to predict population viability. We argue that current genomic analyses alone cannot reliably predict the effects of deleterious genetic variation on population growth, because these depend on demographic, ecological and genetic parameters that need more than just genome sequence data to be measured. Thus, while purely genomic analyses of genetic load promise to improve our understanding of the composition of the genetic load, they are currently of little use for evaluating population viability. Demographic data and ecological context remain crucial to our understanding of the consequences of deleterious genetic variation for population fitness. However, when combined with such demographic and ecological data, genomic information can offer important insights into genetic variation and inbreeding that are crucial for conservation decision making. [ABSTRACT FROM AUTHOR]
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- 2024
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20. Deciphering Molecular Mechanisms and Diversity of Plant Holobiont Bacteria: Microhabitats, Community Ecology, and Nutrient Acquisition.
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Grzyb, Tomasz and Szulc, Justyna
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BIOTIC communities , *CONSERVATION biology , *MOLECULAR biology , *PLANT diversity , *SUSTAINABLE agriculture - Abstract
While gaining increasing attention, plant–microbiome–environment interactions remain insufficiently understood, with many aspects still underexplored. This article explores bacterial biodiversity across plant compartments, including underexplored niches such as seeds and flowers. Furthermore, this study provides a systematic dataset on the taxonomic structure of the anthosphere microbiome, one of the most underexplored plant niches. This review examines ecological processes driving microbial community assembly and interactions, along with the discussion on mechanisms and diversity aspects of processes concerning the acquisition of nitrogen, phosphorus, potassium, and iron—elements essential in both molecular and ecological contexts. These insights are crucial for advancing molecular biology, microbial ecology, environmental studies, biogeochemistry, and applied studies. Moreover, the authors present the compilation of molecular markers for discussed processes, which will find application in (phylo)genetics, various (meta)omic approaches, strain screening, and monitoring. Such a review can be a valuable source of information for specialists in the fields concerned and for applied researchers, contributing to developments in sustainable agriculture, environmental protection, and conservation biology. [ABSTRACT FROM AUTHOR]
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- 2024
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21. Climate-driven distributional shifts in Chocó endemic birds of southwest Colombia.
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Mota, Flávio M. M., Kittelberger, Kyle D., Flórez-Paí, Cristian, and Şekercioğlu, Çağan H.
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CLIMATE change adaptation ,GREENHOUSE gases ,ENDANGERED species ,ENDEMIC birds ,FOREST conservation - Abstract
Introduction: Climate change poses a significant threat to bird communities, especially forest-dwelling and narrowly distributed species, which are expected to experience severe range contractions and higher extinction risks compared to widely distributed and open-area species. The Chocó region in southwestern Colombia, known for its rich bird endemism, is particularly vulnerable. Methods: We analyzed potential distribution shifts for 27 endemic and near-endemic bird species in the Chocó region using eBird occurrence records and climate projections. We modeled species distributions under low and high greenhouse gas emission scenarios for 2050 and 2070, comparing these projected distributions to current forested and protected areas to evaluate future conservation needs. Results: Our findings indicate that nearly all species are projected to lose climate-suitable areas under at least one future scenario, resulting in a regional decline in species richness. Changes in species richness are most pronounced near the Colombia-Ecuador border, suggesting a shift to higher elevations. Notably, the Scarlet-and-white Tanager (Chrysothlypis salmoni) is predicted to suffer the greatest losses in climate-suitable area, both within protected and forested regions. Discussion: These results highlight the urgency of expanding the protected area network and conserving key forested regions to help species adapt to climate change. By providing projected distribution maps and potential range shifts, our study underscores the importance of modeling future distributions to support conservation strategies for at-risk species and the ecological services they provide in tropical montane regions. [ABSTRACT FROM AUTHOR]
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- 2024
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22. Biodiversity conservation, consistency, and Mus musculus.
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Rohwer, Yasha, Palmer, Clare, and Searle, Jeremy B.
- Subjects
- *
BIODIVERSITY conservation , *WILDLIFE conservation , *CONSERVATION biology , *MICE , *CONSERVATION projects (Natural resources) - Abstract
The house mouse (
Mus musculus ) is often thought of as a pest species in biological conservation, in agriculture, and in urban areas. As a result, populations are frequently targeted for control and eradication. However,M. musculus has notable within‐species biodiversity: it has genetically, morphologically, and behaviorally distinct subpopulations. Conserving biodiversity is usually considered the paramount goal of conservation biology, not least because biodiversity is claimed to have intrinsic value. But the biodiversity in mouse populations is often overlooked. In particular, conservationists do not call for the unique diversity represented by threatened mouse populations to be protected. This is illustrative of the inconsistent valuing of biodiversity in conservation. If biodiversity is intrinsically valuable, then it should be valued; however, it reveals itself. And yet, in examples presented here, unique populations of house mice with clear biodiversity value are threatened by eradication campaigns on islands and by changing agricultural practices on the Swiss–Italian border. The inconsistent valuing of biodiversity in the case ofM. musculus raises important questions about whether the intrinsic value of biodiversity in conservation is, in practice, conditional on other implicit assumptions. [ABSTRACT FROM AUTHOR]- Published
- 2024
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23. Altitudinal Distribution of Grasshoppers in the Mountains of Inner Asia: Recalling the Past and Imagining the Future.
- Author
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Sergeev, M. G., Baturina, N. S., Kim-Kashmenskaya, M. N., and Molodtsov, V. V.
- Subjects
- *
BIODIVERSITY conservation , *BIODIVERSITY , *ENVIRONMENTAL sciences , *ENDEMIC species , *INSECT conservation - Abstract
Grasshoppers are one of the most important groups of primary consumers in the mountains of Inner Asia. During outbreaks, they can eradicate all or almost all green phytomass. Besides, these mountains are also home for many endemic taxa. The goal of the article is to reveal the main patterns of acridid altitudinal distribution and its feasible alterations in the mountains of Inner Asia relative to climate change and alteration of human activity. Altitudinal distribution patterns are revealed for the different mountains of Inner Asia, and their peculiarities are characterized. The significant contrast is shown between the northern parts of the region where the altitudinal long-term shifts in grasshopper distribution are absent or very weak and its central and, probably, southern areas wherever such alterations look like extremely considerable. The results of distribution modelling of two mountain endemics (Stenobothrus newskii and S. kirgizorum) are discussed. In this context, importance of adding the data on altitudes is shown. The main trends in grasshoppers' distribution alterations are characterized for the mountains of Inner Asia. However, these trends are multidirectional and the reasons determining them are not always obvious, problems arise in assessing the factors determining the shifts in the altitudinal boundaries of ranges, and the actual state and probable fate of mountain populations of both possible pests and rare and/or endemic species. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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24. How Much Warming Can Mosquito Vectors Tolerate?
- Author
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Couper, Lisa I., Nalukwago, Desire Uwera, Lyberger, Kelsey P., Farner, Johannah E., and Mordecai, Erin A.
- Subjects
- *
GLOBAL warming , *CLIMATE change , *CONSERVATION biology , *CHIKUNGUNYA , *MOSQUITOES , *MOSQUITO vectors , *MALARIA - Abstract
Climate warming is expected to substantially impact the global landscape of mosquito‐borne disease, but these impacts will vary across disease systems and regions. Understanding which diseases, and where within their distributions, these impacts are most likely to occur is critical for preparing public health interventions. While research has centered on potential warming‐driven expansions in vector transmission, less is known about the potential for vectors to experience warming‐driven stress or even local extirpations. In conservation biology, species risk from climate warming is often quantified through vulnerability indices such as thermal safety margins—the difference between an organism's upper thermal limit and its habitat temperature. Here, we estimated thermal safety margins for 8 mosquito species that are the vectors of malaria, dengue, chikungunya, Zika, West Nile and other major arboviruses, across their known ranges to investigate which mosquitoes and regions are most and least vulnerable to climate warming. We find that several of the most medically important mosquito vector species, including Ae. aegypti and An. gambiae, have positive thermal safety margins across the majority of their ranges when realistic assumptions of mosquito behavioral thermoregulation are incorporated. On average, the lowest climate vulnerability, in terms of both the magnitude and duration of thermal safety, was just south of the equator and at northern temperate range edges, and the highest climate vulnerability was in the subtropics. Mosquitoes living in regions including the Middle East, the western Sahara, and southeastern Australia, which are largely comprised of desert and xeric shrubland biomes, have the highest climate vulnerability across vector species. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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25. The Coevolution of Descriptive and Evaluative Beliefs in Aldo Leopold's Thinking.
- Author
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Millstein, Roberta L.
- Subjects
- *
CONSERVATION biology , *COEVOLUTION , *PHILOSOPHERS - Abstract
The founder of conservation biology, Michael Soulé, set out a vision for conservation biology that was explicitly value-laden, analogous to cancer-biology. In so doing, he drew on the writings of Aldo Leopold, known among philosophers primarily for his land ethic. Employing and extending the work of Anderson (2004) and Clough (2020), I argue that the Leopoldian views that Soulé was drawing on were the product of the coevolution of descriptive and evaluative beliefs over the course of Leopold's life, grounded in his experiences, resulting in tested and reliable—albeit defeasible—values underlying conservation biology. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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26. Harder, better, faster, stronger? Dispersal in the Anthropocene.
- Author
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Faulkner, Katelyn T., Hulme, Philip E., and Wilson, John R.U.
- Subjects
- *
CONSERVATION biology , *WILD animal trade , *INTRODUCED species , *BIOSECURITY , *CLIMATE change , *BIOLOGICAL invasions - Abstract
Humans have altered the dispersal of organisms in the Anthropocene by creating new dispersal mechanisms and altering natural dispersal, with cascading impacts on biodiversity, humans, and ecosystems. Various actions to either promote or limit dispersal will be critical to achieve internationally agreed conservation targets. A classification framework developed in the context of biological invasions has provided valuable insights into dispersal and its management. We extended this framework to encompass all types of dispersal in the Anthropocene. The proposed scheme classifies the movement of organisms into categories associated with active dispersal by humans, human-mediated natural dispersal, and natural dispersal; and can be used to improve our understanding of dispersal, provide policy relevant advice, inform conservation and biosecurity actions, and facilitate monitoring and reporting. The dispersal of organisms in the Anthropocene has been profoundly altered by human activities, with far-reaching consequences for humans, biodiversity, and ecosystems. Managing such dispersal effectively is critical to achieve the 2030 targets of the Kunming–Montreal Global Biodiversity Framework. Here, we bring together insights from invasion science, movement ecology, and conservation biology, and extend a widely used classification framework for the introduction pathways of alien species to encompass other forms of dispersal. We develop a simple, global scheme for classifying the movement of organisms into the types of dispersal that characterise the Anthropocene. The scheme can be used to improve our understanding of dispersal, provide policy relevant advice, inform conservation and biosecurity actions, and enable monitoring and reporting towards conservation targets. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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27. Framing challenges and polarized issues in invasion science: toward an interdisciplinary agenda.
- Author
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Guareschi, Simone, Mathers, Kate L, South, Josie, Navarro, Laetitia M, Renals, Trevor, Hiley, Alice, Antonsich, Marco, Bolpagni, Rossano, Bortolus, Alejandro, Genovesi, Piero, Jere, Arthertone, Madzivanzira, Takudzwa C, Phaka, Fortunate M, Novoa, Ana, Olden, Julian D, Saccó, Mattia, Shackleton, Ross T, Vilà, Montserrat, and Wood, Paul J
- Subjects
- *
NATURAL resources management , *CONSERVATION biology , *POLARIZATION (Social sciences) , *INTRODUCED species , *INFORMATION sharing , *BIOLOGICAL invasions - Abstract
In a hyperconnected world, framing and managing biological invasions poses complex and contentious challenges, affecting socioeconomic and environmental sectors. This complexity distinguishes the field and fuels polarized debates. In the present article, we synthesize four contentious issues in invasion science that are rarely addressed together: vocabulary usage, the potential benefits of nonnative species, perceptions shifting because of global change, and rewilding practices and biological invasions. Researchers have predominantly focused on single issues; few have addressed multiple components of the debate within or across disciplinary boundaries. Ignoring the interconnected nature of these issues risks overlooking crucial cross-links. We advocate for interdisciplinary approaches that better integrate social and natural sciences. Although they are challenging, interdisciplinary collaborations offer hope to overcome polarization issues in invasion science. These may bridge disagreements, facilitate knowledge exchange, and reshape invasion science narratives. Finally, we present a contemporary agenda to advance future research, management, and constructive dialogue. [ABSTRACT FROM AUTHOR]
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- 2024
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28. Neutral Genetic Diversity in Mixed Mating Systems.
- Author
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Uyenoyama, Marcy K.
- Subjects
- *
GENITALIA , *CONSERVATION genetics , *GENETIC variation , *INTERSEXUALITY , *CONSERVATION biology - Abstract
Background/Objectives: Systems of reproduction differ with respect to the magnitude of neutral genetic diversity maintained in a population. In particular, the partitioning of reproductive organisms into mating types and regular inbreeding have long been recognized as key factors that influence effective population number. Here, a range of reproductive systems are compared with respect to the maintenance of neutral genetic diversity. This study addresses full gonochorism, full hermaphroditism, androdioecy (male and hermaphroditic reproductives), and gynodioecy (female and hermaphroditic reproductives). Methods: Coalescence theory is used to determine the level of diversity maintained under each mating system considered. Results: For each mating system, the nature of the dependence of the level of neutral diversity on inbreeding depression, sex-specific viability, and other factors is described. In particular, the models account for the effects of sex-specific viability on the evolutionarily stable sex ratio and the collective contribution of each mating type (sex) to the offspring generation. Conclusions: Within the context of conservation biology, population genetic and quantitative genetic theory has addressed the determination of the target minimum effective population size. In contrast, this study proposes and explores a summary statistic (a ratio of effective numbers) as a means of characterizing the context in which evolution occurs. [ABSTRACT FROM AUTHOR]
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- 2024
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29. Can subadult captive-bred common hamsters (Cricetus cricetus) reproduce in the wild? New perspectives for restocking programs.
- Author
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Fleitz, Julie, Hebrard, Arthur, Kourkgy, Charlotte, Reiners, Tobias E., Garnier, Lorène, Tissier, Mathilde L., and Handrich, Yves
- Subjects
- *
OLDER people , *CONSERVATION biology , *BIOLOGICAL fitness , *HAMSTERS , *RECRUITMENT (Population biology) - Abstract
Individual recruitment is a critical component of conservation biology. While most restocking programs seek to increase population growth, they often encounter challenges in identifying the factors that could maximize post-release survival and reproduction, largely due to the difficulties in conducting tests on vulnerable species. Regarding the Critically Endangered common hamster (Cricetus cricetus), restocking programs generally rely on the release of one-year-old captive-bred individuals. However, these hamsters face high mortality rates in the weeks following their release. Because young individuals display higher behavioural plasticity, they might adapt faster and thus be optimal candidates for restocking programs. However, the release of animals which are too young to reproduce may jeopardize the success of restocking programs. We investigated the reproductive success of 1.5- and 3-month-old females (referred to as "subadult" denoting months-old hamsters after weaning and before their first hibernation) captive-bred common hamsters after release. Field data (camera traps and trapping sessions) and genetic analysis enabled us to determine parentage of pups born in the wild. Our experiment showed that 3-month-old and 1.5-month-old females reproduced successfully after the release at the same time than one-year-old hamsters.Both groups produced their first litter approximately 30 days post-release given an estimated mating date of 10 days post-release. These findings indicate that released captive-bred hamsters reach sexual maturity around 47 days after birth. The release of subadult individuals could provide advantages to improve the success of restocking programs. However, more studies are needed to compare the survival and reproduction rates of months-old hamsters and older individuals to assess their overall role in population recruitment in comparison to older individuals usually released. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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30. A framework for promoting disciplinary diversity and inclusion through epistemic justice.
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Nyssa, Zoe, Winkler‐Schor, Sophia, Lobo, Diele, Eyster, Harold N., and Wright, Andrew J.
- Subjects
- *
SOCIAL structure , *POWER (Social sciences) , *TASK forces , *CONSERVATION biology , *JUSTICE - Abstract
Integrating diverse disciplines and knowledge practices into conservation offers new insights into the complex socioecological dynamics of conservation challenges and how to address them. Integration, however, is not simple; disciplines differ widely in their epistemic and professional commitments, theories, methods, applications, practices, and codes of ethics. Using an epistemic justice approach, we examined how and why different forms of disciplinary and social diversity are connected and offer a framework for promoting disciplinary diversity for conservation science and practice. This framework draws on a literature review and open‐ended responses from surveys of Society for Conservation Biology (SCB) members (n = 577) and nonmembers (n = 213) on experiences of professional and disciplinary exclusion and inclusion collected by SCB's Disciplinary Inclusion Task Force. We propose 4 steps conservation organizations and projects can take to promote disciplinary diversity and inclusion: know your history; understand power dynamics; listen to underrepresented voices; and operationalize disciplinary diversity and inclusion. As members of a highly interdisciplinary and diverse task force, we illustrated this framework through reflections on our shared experiences working together and the challenges and opportunities we faced. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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31. Enhancing disciplinary diversity and inclusion in conservation science and practice based on a case study of the Society for Conservation Biology.
- Author
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Winkler‐Schor, Sophia, Eyster, Harold N., Lobo, Diele, Redmore, Lauren, Wright, Andrew J., Lukasik, Victoria M., Chávez‐Páez, Wendy, Tully, Brooke, Beard, Sarah, Blount‐Hill, Kwan‐Lamar, Christen, Catherine, and Nyssa, Zoe
- Subjects
- *
GRASSROOTS movements , *CONSERVATION biology , *TASK forces , *LIFE sciences , *KNOWLEDGE transfer - Abstract
Effective conservation requires a variety of perspectives that center on different ways of knowing. Disciplinary diversity and inclusion (DDI) offers an important means of integrating different ways of knowing into pressing conservation challenges. However, DDI means more than multiple disciplinary approaches to conservation; cognitive diversity and epistemic justice are key. In 2020, the Disciplinary Inclusion Task Force was formed via a grassroots movement of the Society for Conservation Biology (SCB) to assess the extent of DDI and to chart a path to increase DDI. First, we assessed past and present SCB governance documents. Next, we surveyed current SCB members (n = 577). Finally, we surveyed nonmember conservationists (n = 213). Members who were not biological scientists perceived SCB as less diverse (21.4% vs. 16%) and not equitable (21.8% vs. 161%), and, although the majority (44) of nonmembers reported that their work aligned reasonably well with the mission of the SCB, they thought the organization focused on biological sciences. Despite SCB's mission to be diverse and inclusive, realizing this mission will likely require diverse epistemological perspectives and shifting from top‐down models of knowledge transfer. In centering on DDI, SCB can achieve its aspirations of connecting members across disciplines and ways of knowing to foster diverse perspectives and practices. We recommend that SCB and other organizations develop mechanisms to increase recruitment and retention of diverse members and leadership as well as expand strategic partnerships to flatten disciplinary hierarchies and promote inclusivity. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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32. Assessing the conservation value of cemeteries to urban biota worldwide.
- Author
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Itescu, Yuval and Jeschke, Jonathan M.
- Subjects
- *
URBAN biodiversity , *CONSERVATION biology , *BOTANICAL gardens , *SPECIES diversity , *URBAN parks - Abstract
Cemeteries are key urban green spaces with multifaceted societal and ecological importance. Their biodiversity is shaped by unique environmental and cultural factors. They can potentially protect rare and endangered species, yet their conservation value compared with other urban green spaces remains largely unexplored. We sought to fill this gap by systematically reviewing literature to investigate the conservation value of cemeteries relative to other urban green spaces (botanical gardens, institutional premises, natural remnants, and parks) by comparing species richness and proportions of native and unique species. We analyzed data from 70 papers covering 50 cities in 27 countries with linear and binomial mixed‐effects models at both site and city level. Cemetery conservation value was similar to urban parks, except for the proportion of unique species, for which parks had significantly higher proportions (21.9% vs. 14.2%, p < 0.001). Cemeteries hosted slightly higher proportions of native species at the city level than botanical gardens (99.7% vs. 99.6%, p < 0.001) and institutional green spaces (96.3% vs. 94.1%, p = 0.034) and proportions comparable to parks and natural remnants (p > 0.05). They also had similar or higher values than institutional premises in species richness and unique species proportions (p > 0.05) and a higher site‐level proportion of native species (p < 0.001). In contrast, species richness (slopes = −0.11 and −0.25, respectively) and unique species proportions (4.4% and 6.9%, respectively, p < 0.001 for both) were lower in cemeteries than in remnants of natural areas and in botanical gardens. The conservation value of cemeteries and parks was similar for animals, but parks had a higher value for plants. Overall, cemeteries were generally at least as valuable as some other green spaces for urban biodiversity and mostly native biota. Their religious and cultural significance suggests they will remain intact in the long term; thus, it is essential to prioritize and further promote their biodiversity in conservation and sustainable urban design plans. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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33. Notes on Piona (Acari: Hydrachnidia: Pionidae) tritonymph moulting from a temperate system in Mexico.
- Author
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Lucia, Montes-Ortiz, Ingrid, García-Gómez, and Manuel, Elías-Gutiérrez
- Subjects
- *
DNA data banks , *LIFE cycles (Biology) , *ZOOLOGY , *INSECT traps , *CONSERVATION biology , *MOLTING - Abstract
The article "Notes on Piona (Acari: Hydrachnidia: Pionidae) tritonymph moulting from a temperate system in Mexico" published in Systematic & Applied Acarology discusses the life cycle of water mites, focusing on the tritonymph stage. The study found tritonymphs in a sample from the San Andrés Tepetitlán Dam in Mexico, providing valuable insights into the molting process. The observations suggest that environmental factors like light and temperature may influence the molting process of tritonymphs. This research contributes to the limited knowledge of water mites' resting stages and highlights the need for further study in this area. [Extracted from the article]
- Published
- 2024
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34. Levels and Spatial Patterns of Effective Population Sizes in the Southern Damselfly (Coenagrion mercuriale): On the Need to Carefully Interpret Single‐Point and Temporal Estimations to Set Conservation Guidelines.
- Author
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Lévêque, Agathe, Duputié, Anne, Vignon, Vincent, Duez, Fabien, Godé, Cécile, Mazoyer, Clément, and Arnaud, Jean‐François
- Subjects
- *
CONSERVATION biology , *GENETIC drift , *LANDSCAPE ecology , *SPATIAL ecology , *POPULATION differentiation - Abstract
The effective population size (Ne) is a key parameter in conservation and evolutionary biology, reflecting the strength of genetic drift and inbreeding. Although demographic estimations of Ne are logistically and time‐consuming, genetic methods have become more widely used due to increasing data availability. Nonetheless, accurately estimating Ne remains challenging, with few studies comparing Ne estimates across molecular markers types and estimators such as single‐sample methods based on linkage disequilibrium or sibship analyses versus methods based on temporal variance in allele frequencies. This study aims at bridging this gap by analysing single‐sample and temporally spaced populations in the southern damselfly (Coenagrion mercuriale), a bioindicator Odonata species of conservation concern found in southwestern Europe's freshwater stream networks. A total of 77 local populations were sampled from a semi‐urbanised area located in eastern France near Strasbourg city, yielding 2842 individuals that were genotyped with microsatellites and 958 of which were also genotyped for 2092 SNPs. Spatial genetic structure was stable over time, suggesting porosity between alternate‐year cohorts. When accounting for spatial genetic structure, single‐sample and temporal estimations of Ne were consistent for each set of molecular markers. Biologically meaningful results were obtained when the effect of migration was minimising by considering metapopulation Ne estimates based on the level of genetic differentiation and population boundaries. In terms of applied conservation and management, most depicted metapopulations displayed large Ne, indicating no immediate need for conservation measures to mitigate anthropogenic pressures, provided that a continuous suitable freshwater network is maintained. However, urbanisation negatively impacted Ne levels in populations close to Strasbourg city. Because Ne is used to inform conservation decisions, caution is crucial in interpreting Ne estimates, especially in continuously distributed populations undergoing migration. Altogether, our study highlights the challenge of obtaining robust Ne estimates and the necessity of careful interpretation to set relevant conservation guidelines. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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35. The Effects of Hybridization and Parasite Infection on the Survival and Behaviour of Endangered Landlocked Salmon Subject to Predation—Implications for Genetic Rescue.
- Author
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Eronen, Aslak, Janhunen, Matti, Hyvärinen, Pekka, Kortet, Raine, and Karvonen, Anssi
- Subjects
- *
LAKE trout , *ATLANTIC salmon , *LIFE history theory , *EYE infections , *CONSERVATION biology , *PREDATION - Abstract
A prerequisite of genetic rescue in endangered and genetically depauperate populations is to pre‐evaluate between possible pros and cons of hybridization for the life history and survival of the target population. We hybridized the critically endangered Saimaa landlocked salmon (Salmo salar m. sebago) with one of its geographically closest relatives, anadromous Baltic salmon from River Kymijoki. In two similar experiments, conducted in semi‐natural streams during overwintering (at age 1.5) and in early summer (age 2+), we studied how hybridization and eye parasite infection (Diplostomum pseudospathaceum) affected survival from predation by Northern pike (Esox lucius). Additionally, we recorded movements of the juvenile salmon using passive integrated telemetry to gain insights into the effect of hybridization and infection on antipredatory behaviour (movement activity and habitat use). Among the uninfected groups, we found significantly lower mortality of hybrid salmon (mortality ± S.E. 14.5% ± 5.4%) compared to purebred landlocked salmon (37.2% ± 9.4%), supporting a positive effect of hybridization under predation risk. This benefit, however, was cancelled out by the parasite infection, which impaired vision and increased the susceptibility to predation. The negative effects of infection were particularly pronounced in the anadromous salmon due to lower infection resistance, compared to the landlocked salmon. Hybridization per se did not affect the activity levels of salmon, but overwintering activity correlated positively with eye cataract coverage, and summer activity was highest in anadromous salmon. These results demonstrate that controlled supplementation of a small animal population with genetically more diverse hybrids could entail both positive and negative implications, at least in the first crossbred generation. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
36. Seabird inputs drive changes in Cladocera assemblages in freshwater ponds.
- Author
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Kane, Zoe A., Duda, Matthew P., Simmatis, Brigitte, and Smol, John P.
- Subjects
- *
COLONIAL birds , *CONSERVATION biology , *MATING grounds , *FOOD chains , *CLADOCERA - Abstract
Seabirds are biovectors that transport large concentrations of nutrients from their marine feeding areas to terrestrial breeding grounds. Here, we used subfossil cladoceran assemblages to assess if, and how, changes in the world's largest colony of Leach's Storm-Petrels affected the structure of Cladocera assemblages over the past ∼1700 years. Using sediment cores from four ponds impacted by Leach's Storm-Petrel colonies on Baccalieu Island (NL, Canada), we observed a consistent transition in cladoceran assemblages from benthic/littoral to pelagic taxa in association with high seabird presence. This shift aligns with previously published limnological changes that tracked the growth of the colony. Compared to trends in sedimentary chlorophyll-a, pelagic cladoceran taxa lagged behind algal shifts driven by seabird activity. The main drivers of cladoceran assemblage shifts were likely alterations to the physical habitat structure and food availability driven by seabird inputs. Furthermore, deposition of calcium from seabirds may have also contributed to changing the composition of cladoceran communities. Our study provides information on food web shifts associated with seabird-driven eutrophication, which can be compared to future paleoecological studies. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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37. Stability analysis in generalist predator-prey dynamics with predator harvesting.
- Author
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Vijaya, S. and Ganga, S.
- Subjects
POPULATION dynamics ,ECOSYSTEMS ,SUSTAINABILITY ,CONSERVATION biology ,RESOURCE management - Abstract
This paper seeks to explore the stability assessment of a generalist predator-prey system with predator harvesting. The study presents a model examining the dynamics between primary prey and predator, considering the existence of a generalist predator. Prey growth follows a logistic rate, while predator consumption is modeled with a cyrtoid functional response. In the absence of primary prey, the predator population adopts a generalist strategy, akin to the Beverton-Holt model. The model also incorporates harvesting on the predator population. We analyze the model's equilibrium, stability, positivity, and boundedness, and use numerical simulations to explore its predictions. This study enhances our understanding of ecological interactions and supports the development of effective conservation and management strategies. [ABSTRACT FROM AUTHOR]
- Published
- 2024
38. Assessment of Vitellogenin Synthesis in Salvator merianae as a Biomarker of Exposure to Xenoestrogens in Terrestrial Ecosystems.
- Author
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Luz Sánchez-Loria, Olga, Valeria García-Valdez, M., and Hernández, Marcela B.
- Subjects
AGRICULTURE ,CONSERVATION biology ,XENOESTROGENS ,VITELLOGENINS ,ENVIRONMENTAL monitoring - Abstract
Copyright of Acta Zoologica Lilloana is the property of Fundacion Miguel Lillo and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2024
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39. Using ensemble modeling to predict the current distribution of Pistacia atlantica Desf. in Algeria.
- Author
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Aloui, Massinissa, Neffar, Souad, and Chenchouni, Haroun
- Abstract
To understand the distribution of Atlas pistachio (Pistacia atlantica Desf.) in Algeria, we analyzed the environmental factors influencing its habitat. This study employs an ensemble modelling (EM) approach, a robust predictive technique in ecological niche modelling that enables us to identify critical environmental drivers affecting plant distributions across different ecosystems' focal species. The EM incorporated four prediction algorithms (generalized linear model, boosted regression trees, random forest, and maximum entropy algorithms); we modelled Atlas pistachio's niche with 2810 occurrence points and 32 environmental variables, including climatic, edaphic, topographic, and anthropogenic factors. The model demonstrated high accuracy, with an AUC of 0.97 and TSS of 0.88. Key factors influencing distribution were precipitation in the driest month (Bio14), soil bulk density (BD), cation exchange capacity (CEC), human modification, and average diurnal amplitude (Bio2), with a relative importance of 20.1%, 12.7%, 6.7%, 4.9%, and 3.1%, respectively. These findings underscore the utility of ensemble modelling to pinpoint specific environmental variables critical to the species' presence and ecological adaptability, which has broader implications for other plant species in arid landscapes. Notably, the probability of Atlas pistachio occurrence increased with BD and decreased with CEC and human influence. Our results emphasize the EM approach as a versatile tool in ecological modelling, facilitating species-specific analyses that contribute to broader ecological restoration efforts, especially in degraded arid and semi-arid regions. This study advances our understanding of Atlas pistachio's environmental requirements and highlights the importance of EM in developing targeted programs to restore degraded ecosystems. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
40. The Influence of Microbiota on Wild Birds' Parental Coprophagy Behavior: Current Advances and Future Research Directions.
- Author
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Gul, Saba, Shi, Yurou, Hu, Jie, and Song, Sen
- Subjects
BIRD populations ,PASSERIFORMES ,CONSERVATION biology ,MIGRATORY birds ,WELL-being - Abstract
This comprehensive review provides an in-depth exploration of the intriguing phenomenon of parental coprophagy in wild birds and its profound implications on the influence of adult avian parents' health. This review investigates the composition and dynamics of avian feces' microbiota, casting light on the various dietary, environmental, and genetic factors that influence its diversity. Furthermore, it emphasizes parental coprophagy, a behavior observed in numerous bird species, particularly among herbivorous and passerine birds. The review investigates multiple hypotheses proposed to explain the occurrence of coprophagy. It delves into its function as a potential mechanism for transmitting microorganisms, particularly feces bacteria, from nestlings to their parents. This microbial transfer may affect the health and well-being of adult avian parents. In addition, the review highlights the current research deficits and debates surrounding coprophagy. These gaps include crucial aspects such as the onset of coprophagy, its long-term effects on both parents and offspring, the nutritional implications of consuming nestling feces, the potential risks of pathogen transmission, and the ecological and evolutionary factors that drive this behavior. As the review synthesizes existing knowledge and identifies areas requiring additional research, it emphasizes the significance of future studies that comprehensively address these gaps. By doing so, we can understand coprophagy's ecological and evolutionary significance in wild birds, advancing our knowledge on avian biology. This information can improve conservation efforts to protect migratory bird populations and their complex ecosystems. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
41. Plant Translocations in France: Identifying Gaps between Knowledge, Practice and Perception by Conservation Actors.
- Author
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Julien, Margaux, Ducrettet, Juliette, Diallo, Mohamed, Imbert, Eric, Colas, Bruno, and Schatz, Bertrand
- Subjects
PLANT translocation ,PLANT population genetics ,ENDANGERED species ,CONSERVATION biology ,LAND use planning - Abstract
In the current context of global changes, threatened flora is declining and homogenising at the expense of rare and protected species. Among conservation biology and ecological restoration techniques, plant translocation is one of the recommendations increasingly used. However, translocation remains risky and is recommended as a last resort to conserve protected flora in land use planning. Furthermore, it raises ethical questions partly linked to genetic processes. In this context, we studied how plant translocations are perceived by conservation actors in France, including their genetic aspects. The analysis of translocation perception complements that of feedback on concrete translocation operations and allows us to provide a qualitative assessment of current practices. We have adopted an interdisciplinary approach to survey different types of actors in nature conservation, involved or not in at least one stage of translocation operations (preparation, implementation and monitoring). Three main types of translocation perception divide our sample quite strongly (50% favourable/ 45% unfavourable/ 5% undecided). Surprisingly, their professional activity or the level of involvement in such an operation have no influence on their opinion on translocation, nor on the proposals of alternative measures. Only 15% of the actors involved in translocations used genetic data at least once. To conclude, it would be necessary to promote the sharing of feedback from past experiences. This would allow an up-to-date list of species unacceptable for translocation. Comparing the results of different protocols and implementation conditions for the same species or group should improve overall translocation success rates. Highlights: Plant translocation is a solution for the conservation of threatened species. This solution is currently ecologically risky and raises ethical and genetic questions. We identified three main perceptions (50% favourable/45% unfavourable/5% undecided). These ratios are similar among the different professional activities of respondents. Improving the feedback and success of translocations should improve its perception. [ABSTRACT FROM AUTHOR]
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- 2024
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42. Currents in Conservation: Navigating Tragic Conflict with Justice and Compassion.
- Author
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Cantens, Kristian
- Abstract
Breaking with the orthodoxy, Compassionate Conservationists have taken issue with the way that individual wild animals are routinely sacrificed for the sake of species preservation or for the good of the ecosystem. Though explicitly aligning themselves with virtue ethics, there has been some confusion about what this means in practice. How is the perfectly compassionate person to act when the choice is between intentionally harming animals and protecting biodiversity? And what if the choice is between direct and indirect harm to animals? Some critics suggest that when faced with these kinds of conflicts of value, Compassionate Conservationists will invariably base their choices either on the arbitrary feelings an action elicits in them, or else revert back to the decision-making procedures that characterize Traditional Conservation. In response, I argue (first) that these critics fail to appreciate that compassion often plays an essential role in moral deliberation. Second, that being compassionate matters even if it does not end up having a discernable effect on what one chooses to do. When one is faced with a tragic predicament in which harming individual animals is unavoidable, for instance, it matters here that one respond with an appropriate compassion. Third, that even when a situation’s difficulty requires one to appeal to the impersonal norms of justice, here too it is required that one proceed with compassion. I end by illustrating these points through the close consideration of a case study: New Zealand’s controversial predator extermination campaign. [ABSTRACT FROM AUTHOR]
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- 2024
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- View/download PDF
43. Assessment of genetic diversity in a locally endangered tern species suggests population connection instead of isolation.
- Author
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Schnelle, Anna, Rollins, Robert E., Cecere, Jacopo G., Serra, Lorenzo, Gutiérrez, Jorge S., Masero, Jose A., Risch, Markus, Bouwhuis, Sandra, and Liedvogel, Miriam
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BIRD declines ,POPULATION differentiation ,GENETIC variation ,WHOLE genome sequencing ,CONSERVATION biology ,GULLS ,WATER birds - Abstract
Many bird populations are declining globally, with migratory sea- and waterbirds among the most threatened groups. Increased isolation between populations, due to habitat loss leading to limited connectivity and reduced gene flow, may accelerate population declines or even cause local extinctions. To address this threat and inform conservation efforts, assessment of the genetic diversity of endangered populations is required. In Central Europe, gull-billed terns (Gelochelidon nilotica) have experienced a severe population decline in the past century, with only one last population of c. 40 breeding pairs remaining. Here, we aimed to characterise the genetic diversity of this population, and to compare it to that of two separate Mediterranean colonies to assess potential population connectivity. To achieve this, we developed a PCR protocol to amplify and sequence the complete mitochondrial genome (mtDNA). We found high genetic diversity in all three populations, and no population structure based on breeding location, as well as moderate population differentiation between Germany and Italy, and low differentiation between Germany and Spain, and between Italy and Spain. The German population, however, showed signs of population restriction, while both Mediterranean colonies showed evidence for population expansion. These results indicate that the last population of gull-billed terns in Central Europe is not acutely threatened by loss of genetic diversity, but instead shows signs of connectivity with other European colonies, which in turn suggests that conservation efforts should best focus on habitat and predation management. [ABSTRACT FROM AUTHOR]
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- 2024
- Full Text
- View/download PDF
44. The structure and connectivity of an archipelagic population of black bears.
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Cooper, Monica R., Edwards, Andrew, Van Stappen, Julie, Nordin Jr., Ronald, Jennings, Dylan, and Pauli, Jonathan N.
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BEAR populations ,MICROSATELLITE repeats ,GENE flow ,CONSERVATION biology ,POPULATION genetics ,BLACK bear - Abstract
Understanding factors that influence the viability of populations is central to conservation biology. Small and isolated populations have elevated risk of extinction due to demographic and genetic stochasticity. The Apostle Islands National Lakeshore features a genetically unique and culturally important population of archipelagic black bears (Makwa; Ursus americanus). While dispersal is central to population viability, previous studies of this population did not sample the adjacent mainland black bear population on the Red Cliff Reservation (Gaa-miskwaabikaang). Therefore, we lack robust estimates of dispersal, gene flow and overall connectivity among the islands and with the mainland population. In partnership with Red Cliff Band of Lake Superior Chippewa and the National Park Service, we non-invasively collected black bear hair, and used 17 microsatellite markers to genotype 141 black bears. We then estimated genetic diversity, population structure, dispersal, and conducted a pedigree network analysis to identify areas of the archipelago important for connectivity and reproduction. We found evidence of a well-connected archipelagic bear population structured into five clusters and characterized by moderate dispersal between islands and mainland. We found that three of the islands are disproportionately important for genetically connecting the archipelago, but the islands were nevertheless reliant upon the mainland for gene flow and genetic diversity. The high connectivity between islands and the mainland demonstrates a potential metapopulation dynamic, where islands may serve as a reservoir of individuals for the mainland and the mainland supplying individuals likely important for maintaining genetic diversity of island populations. Given the importance of island–mainland connectivity, future tribal and federal collaboration will be important to maintain a genetically and demographically viable population of black bears. [ABSTRACT FROM AUTHOR]
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- 2024
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45. DNA-based studies and genetic diversity indicator assessments are complementary approaches to conserving evolutionary potential.
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Hoban, Sean, Paz-Vinas, Ivan, Shaw, Robyn E., Castillo-Reina, Luis, da Silva, Jessica M., DeWoody, J. Andrew, Ekblom, Robert, Fedorca, Ancuta, Forester, Brenna R., Funk, W. Chris, Geue, Julia C., Heuertz, Myriam, Hollingsworth, Peter M., Hughes, Alice C., Hunter, Margaret E., Hvilsom, Christina, Ishihama, Fumiko, Jordan, Rebecca, Kalamujić Stroil, Belma, and Kershaw, Francine
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GENETIC variation ,POPULATION genetics ,BIODIVERSITY monitoring ,GENE flow ,CONSERVATION biology - Abstract
Genetic diversity is essential for maintaining healthy populations and ecosystems. Several approaches have recently been developed to evaluate population genetic trends without necessarily collecting new genetic data. Such "genetic diversity indicators" enable rapid, large-scale evaluation across dozens to thousands of species. Empirical genetic studies, when available, provide detailed information that is important for management, such as estimates of gene flow, inbreeding, genetic erosion and adaptation. In this article, we argue that the development and advancement of genetic diversity indicators is a complementary approach to genetic studies in conservation biology, but not a substitute. Genetic diversity indicators and empirical genetic data can provide different information for conserving genetic diversity. Genetic diversity indicators enable affordable tracking, reporting, prioritization and communication, although, being proxies, do not provide comprehensive evaluation of the genetic status of a species. Conversely, genetic methods offer detailed analysis of the genetic status of a given species or population, although they remain challenging to implement for most species globally, given current capacity and resourcing. We conclude that indicators and genetic studies are both important for genetic conservation actions and recommend they be used in combination for conserving and monitoring genetic diversity. [ABSTRACT FROM AUTHOR]
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- 2024
- Full Text
- View/download PDF
46. The complete chloroplast genome of Syzygium zeylanicum (Myrtaceae, Myrtales) and its phylogenetic analysis.
- Author
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Thi Huynh, Thu-Thao, Quang, Minh Trong, and Nguyen, Hoang Danh
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CHLOROPLAST DNA ,COMPARATIVE genomics ,NUCLEOTIDE sequencing ,CONSERVATION biology ,PHYLOGENY - Abstract
The complete chloroplast genome of Syzygium zeylanicum (L.) DC. 1828 has been sequenced and analyzed for the first time. The S. zeylanicum chloroplast genome is 159,445 bp in length, comprised of a large single-copy region (88,034 bp), a small single-copy region (18,455 bp), and a pair of inverted repeat regions (26,478 bp each). The genome encoded 85 protein-coding genes, 37 tRNA genes, and eight rRNA genes. Phylogenetic analysis indicated that S. zeylanicum is closely related to S. acuminatissimum. This research provides essential genomic data for S. zeylanicum, offering valuable resources for future comparative genomics, phylogenetics, and conservation biology studies. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
47. Eyes on nature: Embedded vision cameras for terrestrial biodiversity monitoring.
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Darras, Kevin F. A., Balle, Marcel, Xu, Wenxiu, Yan, Yang, Zakka, Vincent G., Toledo‐Hernández, Manuel, Sheng, Dong, Lin, Wei, Zhang, Boyu, Lan, Zhenzhong, Fupeng, Li, and Wanger, Thomas C.
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AGRICULTURE ,LANDSCAPE ecology ,OBJECT recognition (Computer vision) ,BIODIVERSITY monitoring ,CONSERVATION biology - Abstract
Copyright of Methods in Ecology & Evolution is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
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48. The urban in ecology: a quantitative textual analysis of the scientific literature over a century.
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Flaminio, Silvia, Salomon Cavin, Joëlle, Guex, Guillaume, and Moretti, Marco
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URBAN ecology ,URBAN research ,SCIENTIFIC literature ,CONTENT analysis ,CONSERVATION biology - Abstract
Many authors have described 'urban ecology' as a subfield of ecology that emerged in the 1990s and has expanded exponentially. We propose to take a step further and analyse the expansion of the 'urban' in ecology with a novel quantitative approach, with the aim to better understand the relationship between ecology and the urban. Previous quantitative assessments of the urban in ecology have focused on short to medium time spans (5 to 40 years) and on research coined as 'urban ecology', and have rarely considered the content of publications (e.g., vocabulary and topics) using quantitative methods. In this paper, we conduct a bibliometric assessment and an in-depth quantitative textual data analysis of a corpus of 960 articles published from 1922 to 2018 in 10 leading English-language journals in ecology and conservation biology. We address the following questions: (1) When and how have urban environments been integrated into ecological research during the past century? (2) What urban research topics have been investigated in ecology during the same period? (3) How have these research topics changed through time? Our results show that the urban was never entirely absent from publications in ecology. The quantitative analyses highlight three turning points (1970s, 1990s and 2000s) in the relationship between ecology and the urban. Moreover, they help visualize the shift from particularly scattered publications at the beginning of the period to publications characterized by a more homogeneous vocabulary, reflecting the stabilization of a research field focused on the urban in ecology. [ABSTRACT FROM AUTHOR]
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- 2024
- Full Text
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49. Latitudinal gradients of biodiversity and ecosystem services in protected and non-protected oak forest areas can inform climate smart conservation
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Anders Forsman, Johanna Sunde, Romana Salis, and Markus Franzén
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Biological diversity ,Conservation biology ,Decision making ,Forest ecosystems ,Global warming ,Species-richness gradients ,Geography (General) ,G1-922 ,Environmental sciences ,GE1-350 - Abstract
Adaptive governance of areas set aside for future protection of biodiversity, sustainable production, and recreation requires knowledge about whether and how effects of area protection are modulated by climate change and redistribution of species. To investigate this, we compare biodiversity of plants (assessed using vegetation plots) and arthropods (collected with Malaise traps, analyzed using metabarcoding) and productivity (tree growth, determined using dendrochronology) in protected and non-protected oak (Quercus spp.) forests along a latitudinal gradient (55.6 °N – 60.8 °N) in Sweden. We also compare historical, recent and projected future climate in the region. In contrast to established global latitudinal diversity gradients, species richness of plants and arthropods increased northwards, possibly reflecting recent climate-induced community redistributions, but neither was higher in protected than in non-protected areas, nor associated with contemporary ground temperature. Species composition of arthropods also did not differ between protected and non-protected areas. Arthropod biomass increased with latitude, suggesting that the magnitude of cascading effects mediated via their roles as pollinators, herbivores, and prey for other trophic levels, varies geographically and will change with a moving climate. Annual growth rate of oaks (an ecosystem service in the form of biomass increase and carbon sequestration) was independent of latitude and did not differ between protected and non-protected areas. Our findings question the efficacy of contemporary designation and management of protected oak forests, and emphasize that development and implementation of modified climate smart conservation strategies is needed to safeguard ecosystem functioning, biodiversity, and recreational values of protected forest areas against future challenges.
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- 2024
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- View/download PDF
50. Strangled by tree huggers
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Davidson, Saxon
- Published
- 2024
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