956 results on '"Simpson, E. H."'
Search Results
2. The nucleus accumbens shell: a neural hub at the interface of homeostatic and hedonic feeding.
- Author
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Marinescu, Alina-Măriuca and Labouesse, Marie A.
- Abstract
Feeding behavior is a complex physiological process regulated by the interplay between homeostatic and hedonic feeding circuits. Among the neural structures involved, the nucleus accumbens (NAc) has emerged as a pivotal region at the interface of these two circuits. The NAc comprises distinct subregions and in this review, we focus mainly on the NAc shell (NAcSh). Homeostatic feeding circuits, primarily found in the hypothalamus, ensure the organism's balance in energy and nutrient requirements. These circuits monitor peripheral signals, such as insulin, leptin, and ghrelin, and modulate satiety and hunger states. The NAcSh receives input from these homeostatic circuits, integrating information regarding the organism's metabolic needs. Conversely, so-called hedonic feeding circuits involve all other non-hunger and -satiety processes, i.e., the sensory information, associative learning, reward, motivation and pleasure associated with food consumption. The NAcSh is interconnected with hedonics-related structures like the ventral tegmental area and prefrontal cortex and plays a key role in encoding hedonic information related to palatable food seeking or consumption. In sum, the NAcSh acts as a crucial hub in feeding behavior, integrating signals from both homeostatic and hedonic circuits, to facilitate behavioral output via its downstream projections. Moreover, the NAcSh's involvement extends beyond simple integration, as it directly impacts actions related to food consumption. In this review, we first focus on delineating the inputs targeting the NAcSh; we then present NAcSh output projections to downstream structures. Finally we discuss how the NAcSh regulates feeding behavior and can be seen as a neural hub integrating homeostatic and hedonic feeding signals, via a functionally diverse set of projection neuron subpopulations. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
3. Increasing plant diversity enhances soil organic carbon storage in typical wetlands of northern China.
- Author
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Liu, Hua-Bing, Yang, Li-Ping, Gao, Jun-Qin, Li, Qian-Wei, Li, Xing-Li, Feng, Jiu-Ge, and Yu, Fei-Hai
- Abstract
Soil organic carbon plays an important role in climate change mitigation, and can be strongly affected by plant diversity. Although a positive effect of plant diversity on soil organic carbon storage has been confirmed in grasslands and forests, it remains unclear whether this effect exists in wetlands. In this study, we investigated plant diversity, soil properties and soil organic carbon across five typical wetlands of northern China, to test the effect of plant diversity on soil organic carbon and clarified the regulators. Increasing plant diversity significantly increased belowground biomass of wetland plant communities, and both soil organic carbon content and storage were significantly positively related to wetland plant diversity. The positive effect of plant diversity was influenced by belowground biomass of wetland plant communities, soil microbial biomass carbon, and soil properties, especially soil water content and bulk density. The structural equation model showed that soil organic carbon storage was dominantly affected by microbial biomass carbon, plant diversity and biomass, with standardized total effects of 0.66 and 0.47, respectively, and there was a significant positive relationship between soil organic carbon and microbial biomass carbon. These results suggest that increasing plant diversity can potentially promote the ability of wetlands to store organic carbon in soils. The findings highlight the importance of plant diversity on soil organic carbon in wetland ecosystems, and have implications for managing wetlands to increase carbon sinks and to mitigate global climate change. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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- View/download PDF
4. Research across disciplines: influence of human resource management practices.
- Author
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Martín-Alcázar, Fernando, Ruiz-Martínez, Marta, and Sánchez-Gardey, Gonzalo
- Subjects
PERSONNEL management ,INTERDISCIPLINARY research ,RESEARCH personnel ,MULTIDISCIPLINARY practices ,QUANTITATIVE research - Abstract
Purpose: This study aims to examine the connection between scholars' research performance and the multidisciplinary nature of their collaborative research. Furthermore, in response to mixed results regarding the effects of multidisciplinarity on research performance, this study explores how human resource management (HRM) practices may moderate this link. Design/methodology/approach: The authors built a model based on the theoretical arguments and empirical evidence found in the review of diversity and HRM literature. The authors also performed a quantitative study based on a sample of scholars in the field of management. Different econometric estimations were used to test the proposed model. Findings: The results of this empirical analysis suggest that multidisciplinary research has a non-linear effect on research performance. Certain HRM practices, such as development and collaboration, moderated the curvilinear relationship between multidisciplinarity and performance, displacing the optimum to allow higher performance at higher levels of multidisciplinary research. Originality/value: The paper provides advances on previous works studying the curvilinear relationship between multidisciplinarity and the researchers' performance, confirming that multidisciplinarity is beneficial up to a threshold beyond which these benefits are attenuated. In addition, the findings shed light on important issues related to team-oriented HRM practices associated with the outcomes of multidisciplinary research. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
5. Genetic evidence points to distinct paternal settlers of the Faroe Islands and Iceland.
- Author
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Mann, Allison E., Magnussen, Eyðfinn, and Tillquist, Christopher R.
- Subjects
CHROMOSOME analysis ,Y chromosome ,GENETIC drift ,HAPLOTYPES ,GENETIC variation - Abstract
Introduction: The Faroe Islands are a small archipelago located in the North Atlantic likely colonized by a small group of founders sometime between 50 and 300 CE. Post colonization, the Faroese people have been largely isolated from admixture with mainland and other island populations in the region. As such, the initial founder effect and subsequent genetic drift are likely major contributors to the modern genetic diversity found among the Faroese. Methods: In this study, we assess the utility of Y-chromosomal microsatellites to detect founder effect in the Faroe Islands through the construction of haplotype networks and a novel empirical method, mutational distance from modal haplotype histograms (MDM), for the visualization and evaluation of population bottlenecks. Results: We compared samples from the Faroe Islands and Iceland to possible regional source populations and documented a loss of diversity associated with founder events. Additionally, within-haplogroup diversity statistics reveal lower haplotype diversity and richness within both the Faroe Islands and Iceland, consistent with a small founder population colonizing both regions. However, in the within haplogroup networks, the Faroe Islands are found within the larger set of potential source populations while Iceland is consistently found on isolated branches. Moreover, comparisons of within-haplogroup MDM histograms document a clear founder signal in the Faroes and Iceland, but the strength of this signal is haplogroup-dependent which may be indicative of more recent admixture or other demographic processes. Discussion: The results of the current study and lack of conformity between Icelandic and Faroese haplotypes implies that the two populations were founded by different paternal gene pools and there is no detectable post-founder admixture between the two groups. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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- View/download PDF
6. Do newer drugs treat fewer diseases, controlling for time since launch? Evidence from France and the U.S.
- Author
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Lichtenberg, Frank R.
- Abstract
Background: More recently approved drugs have significantly fewer indications than drugs approved many years ago. One possible reason for this may be that, controlling for the number of years since approval or launch, more recently approved drugs have fewer indications (e.g. at the time of launch). The role of precision and personalised medicine has increased, and the goal of precision medicine is to provide a more precise approach for the prevention, diagnosis and treatment of disease. Drugs that have fewer indications may be 'more precise' than drugs that have many indications. Methods: We use different kinds of data from two countries – France and the U.S. – to analyze the relationship across many drugs between the number of indications of a drug, the drug's vintage – i.e. the year in which the drug was first marketed or approved – and its age – the number of years it has been marketed. Results: All the evidence from both countries indicates that, controlling for drug age, more recently approved drugs tend to have fewer indications than drugs approved many years ago. In the U.S., a 10-year increase in vintage is associated with a 10.7% decline in the effective number of indications of all drugs, and a 19.4% decline in the effective number of indications of drugs approved after 1989. In France, the positive effect on the number of indications of the increase in drug age was more than offset by the negative effect of the increase in drug vintage. Conclusions: More recently approved drugs are less likely to be 'general-purpose technologies' (or even multi-purpose technologies) than older drugs. The relative importance of 'precision medicine' has increased in recent decades. Drugs that have fewer indications may be 'more precise' than drugs that have many indications. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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7. Aggressivity in Schizophrenia: The Risk and Confounders in a Romanian Setting.
- Author
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Bonea, Maria, Kadar, Iulia-Larisa, Delcea, Cristian, Horgoș, Bianca Mălina, and Crișan, Cătălina Angela
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ALCOHOLISM ,AT-risk behavior ,SUBSTANCE abuse ,RISK of violence ,VIOLENCE - Abstract
There is an increased stigma in Romania regarding schizophrenia patients, who are thought to be violent and dangerous. However, there is little research on this topic that analyzes the exact risk of aggressive behavior, especially considering the high prevalence of alcohol and substance abuse, conditions also associated with a potential risk of violent behavior. The objectives of this study were to compare aggressivity levels between patients with schizophrenia admitted to an emergency hospital and healthy individuals and to find possible risk factors. This case-control study, matched for age and gender included 50 patients hospitalized for schizophrenia and 50 healthy participants from an emergency psychiatric facility in Romania. We collected demographic data and screened for major mental disorders using the Mini International Neuropsychiatric Interview (MINI). Aggressivity levels were measured with the Buss-Perry Aggression Questionnaire (BPAQ). The CAGE questionnaire and the Drug Abuse Screening Test (DAST-10) were used to screen for alcohol and substance use disorder. The results highlighted a 3.93 times increase in aggressivity in the schizophrenia group, with the involvement of specific violent domains. Younger men with alcohol abuse had a higher risk of violent acts. Schizophrenia patients appear to present an increased risk of violence, but this must be carefully assessed and confounders considered. Public health programs are needed to increase treatment compliance and decrease alcohol and other psychoactive substances consumption. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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8. Building an Empirical Body of Evidence: Developing Rapport With Reviewers and Overcoming Skepticism in Strategic Management Research.
- Author
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Quigley, Timothy J.
- Published
- 2024
- Full Text
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9. Patterns and drivers in the functional diversity decomposition of invaded stream fish communities.
- Author
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Feng, Kai, Takács, Péter, Czeglédi, István, and Erős, Tibor
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STRUCTURAL equation modeling ,BIOTIC communities ,FRESHWATER fishes ,NATIVE fishes ,FISHING villages ,FISH communities - Abstract
Aim: The assembly of real‐world ecological communities in human‐modified landscapes is influenced by a complex interplay of spatial, temporal, environmental and invasion gradients. However, understanding the relative importance of these drivers and their interactions in shaping functional assembly remains elusive. Our study aimed to investigate the relative influence of these drivers on the functional assembly of a stream fish metacommunity. Location: Streams of the Lake Balaton catchment, Hungary. Methods: We analysed a long‐term (18‐year) dataset of the stream fish metacommunity, focusing on changes in functional diversity (Q), redundancy (R) and species dominance (D). Ternary diagrams were utilized to decompose functional diversity into Q, R and D components and to visualize diversity patterns. Linear mixed‐effect regression and separate structural equation models were employed to identify significant drivers of Q, R and D. Results: Native fish communities exhibited low functional diversity (Q) but high redundancy (R) and dominance (D), indicating functional convergence and dominance. Stream habitat size, network position and associated spatial, physical and chemical gradients emerged as consistently significant drivers of D and R. Changes in Q were additionally linked to non‐native community properties and subtle shifts in land use and within‐stream habitat characteristics. Main Conclusions: Our findings suggest that both environmental filtering and interspecies interactions, particularly trait similarity between invaders and natives shape functional assembly of stream fish metacommunities. Despite minimal temporal directional changes, environmental drivers predominantly influence long‐term diversity patterns of native fish communities, overshadowing invasion effects. Our findings underscore the importance of considering both environmental filtering mechanisms and interspecies interactions in understanding functional assembly. Additionally, the joint application of diversity decomposition frameworks with predictive modelling provides comprehensive insight into patterns of functional diversity and assembly across ecological communities. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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10. Weed Flora Composition in Upland Direct Seeded Rice in Brahmaputra River Ecotones and Edges in Majuli District, Assam.
- Author
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Borah, Rashmi Rekha, Gogoi, Animesh, and Barua, Iswar Ch.
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CHANNELS (Hydraulic engineering) ,BRAIDED rivers ,WEED competition ,FARMS ,VEGETATION patterns - Abstract
Background: The River Brahmaputra is one of the largest braided rivers in the world, where the island and bars ("Chapories") are formed almost annually by erosion and deposition, which are good agricultural lands, as most of the depositions are extremely fertile and possess ready water source in close proximity. With an aim to depict the weed vegetation pattern in upland direct seeded rice ecosystem in such an ecotone zone, Chapories of Majuli district were surveyed during 2021 and 2022. Methods: One square meter quadrates were plotted in between 20 to 65 days after sowing (before flowering) of rice to study the weed status in the critical period of crop weed competition in four locations. Result: Study recorded altogether 55 species of weedy nature in four locations with as many as 39 broadleaved species belonging to 25 families, 3 sedges and 13 grasses, which represented a great diversity with several unusual species unique to chapori areas. Isolation of location - 4 by water channel has contributed in increasing dissimilarity with respect to weed flora, though river water might have had great role in distribution of weeds especially the stubble borne perennial species. The cumulative IVI of grass species was also 30.4 per cent higher in this isolated location than the non-grass species, unlike the locations that had land connectivity with shore areas. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
11. Distribution pattern of soil nematode communities along an elevational gradient in arid and semi-arid mountains of Northwest China.
- Author
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Chen, Jingliang, Zhang, Yafeng, Liu, Chao, and Huang, Lei
- Subjects
SOIL ecology ,SOIL nematodes ,SPATIAL ecology ,MOUNTAIN ecology ,SOIL depth ,POTASSIUM - Abstract
Soil nematodes are the most abundant soil metazoans, occupying multiple trophic levels in the soil food web and playing an important role in soil function. Research on the biogeographic distribution patterns of soil nematode communities and their drivers has received greater attention. However, the distribution characteristics of soil nematode communities along the elevational gradient in the arid and semi-arid regions of Northwest China remain unclear. In this study, four elevational gradients (1750–1900, 1900–2100, 2100–2350 and 2350–2560 m) were established on Luoshan Mountain, Ningxia, an arid and semi-arid region in Northwest China, and soil nematodes in the soil layers of 0–10, 10–20 and 20–40 cm were investigated using the improved Baermann funnel method. The results revealed a monotonically decreasing trend in the total number of soil nematodes along the elevational gradient and soil layer depth, decreasing by 63.32% to 79.94% and 73.59% to 86.90%, respectively, while the interactions were not obvious. A total of 1487 soil nematodes belonging to 27 families and 32 genera were identified across the elevational gradient, with Helicotylenchus as the dominant genus, accounting for 10.43% of the total number of nematodes, and bacterivore nematodes as the main trophic groups, accounting for 32.39% to 52.55% of the relative abundance at each elevation, which increased with increasing elevation. Soil nematode community diversity, richness and maturity indices were relatively low at high elevation and decreased by 44.62%, 48% and 54.74%, respectively, with increasing soil layer depth at high elevations. Compared to low elevations, high-elevation soils experienced greater disturbance, reduced structural complexity and nutrient enrichment of the soil food web, and a shift in soil organic matter decomposition from bacterial to fungal pathways as elevation increased. Finally, redundancy analysis showed that soil pH, bulk density, soil moisture, soil organic carbon, available nitrogen, available phosphorus and available potassium were the main soil factors affecting the composition of soil nematode communities, which well explained the differences in nematode communities at different elevations and soil depths. This study can be used as basic information for further research on soil biota in this mountainous region, expanding our further understanding of the spatial ecology of soil nematodes in the arid and semi-arid mountain ecosystems. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
12. Distribution and diversity of cultured endophytic fungi in Gentiana straminea Maxim. at different altitudes on the northeastern Qinghai-Tibetan Plateau.
- Author
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Cheng, Tingfeng, Lin, Pengcheng, Zhou, Dangwei, Wang, Huan, Zheng, Kun, Shen, Jianwei, Shi, Shengbo, Hu, Xingqiang, Ye, Xing, and Cao, Xueye
- Subjects
FISHER discriminant analysis ,ENDOPHYTIC fungi ,FUNGAL colonies ,COLONIZATION (Ecology) ,HOST plants - Abstract
Endophytic fungi are a crucial microbial resource that can influence plant growth and development through their interactions with host plants. Gentiana straminea Maxim. is an important traditional Tibetan herb used to treat a range of diseases in the Qinghai-Tibetan region. However, the diversity and community structure of endophytic fungi in the species remain poorly understood. In this study, a total of 944 strains of endophytic fungi were isolated from the roots, stems, and leaves of G. straminea from four different altitudes. A total of 87 OTUs were identified through sequence alignment, comprising 6 classes, 15 orders, 25 families, and 44 genera. The colonization rate and diversity of endophytic fungi were affected by tissue type and altitude. With the exception of Xining, the endophytic fungi colonization rate of tissues was roots>leaves>stems. Moreover, the α -diversity of endophytic fungi among different tissues was leaves>stems>roots. Notably, the phylogenetic diversity index in leaves was significantly higher than that in roots. In addition, the colonization rate and diversity of endophytic fungi in leaves and stems demonstrated a decline with the increasing altitude. The β -diversity analysis revealed significant differences in the endophytic fungi of G. straminea at varying altitudes. In roots, geographical factors, such as latitude and longitude, were the primary drivers of variation, whereas environmental factors, including temperature and precipitation, had a greater influence on endophytes in leaves and stems. In addition, the results of the endophytic fungi association preference, linear discriminant analysis effect size (LEfSe), and co-network analysis indicated that these differential endophytic fungi may play a significant role in the authenticity and stress resistance of G. straminea. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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13. Abundance and diversity of diatoms and dinoflagellates in an embayment off Central Chile (30°S): evidence of an optimal environmental window driven by low and high frequency winds.
- Author
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Jacob, Barbara Gianella, Astudillo, Orlando, Dewitte, Boris, Valladares, María, Alvarez Vergara, Gonzalo, Medel, Carolina, Crawford, David W., Uribe, Eduardo, and Yanicelli, Beatriz
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VERTICAL mixing (Earth sciences) ,ALGAL blooms ,WIND pressure ,SPECIES diversity ,BIOMASS - Abstract
The relationship between phytoplankton abundances and wind forcing in upwelling systems involves a number of processes that make the relationship nonlinear in nature. In particular, although upwelling-favorable winds tend to provide nutrients for phytoplankton growth, they can also induce export of both biomass and nutrients to the open ocean through Ekman and eddy-induced transport, or dilution of populations through vertical mixing, which negatively impacts increase in biomass. These processes are essentially nonlinear and can interact antagonistically or synergistically on the overall coastal accumulation of biomass. Consequently, producers and consumers tend to decline above a certain wind threshold despite input of nutrient-enriched water. We have observed this phenomenon in an embayment off Central Chile (30°S), where almost 10 years (2000-2009) of microphytoplankton data were analyzed together with environmental variables and wind phenology. Our findings showed that abundance, species diversity and evenness of diatoms and dinoflagellates all increased post-2005 when the mean of the alongshore surface wind stress reached a maximum threshold value of 0.026 N m
-2 , observed at the decadal temporal variability scale. The increased abundances of diatoms and dinoflagellates post-2005 was associated with the changing phase of the Pacific Decadal Oscillation (PDO) from positive (warm) to negative (cold) phases, which was also associated with a decrease in the intra-seasonal wind activity. Both abundance and diversity of the microphytoplankton community peaked during the post-2005 period whereas higher abundances and frequency of harmful algal blooms (e.g. Pseudo-nitzschia australis) were observed prior to 2005. We suggest that the low-frequency (decadal) variations of mean wind stress during a transition phase of the PDO combined with the reduction in intra-seasonal (periods shorter than 2 months) wind variability after 2005 provided an "optimal environmental window" for the ecosystem. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
14. One Size Doesn't Fit All: An Exploratory Typological Approach to Understanding Criminal Career Heterogeneity in Intimate Partner Homicide.
- Author
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Péloquin, Olivier, Chopin, Julien, Fortin, Francis, Guay, Jean-Pierre, Chartrand, Eric, and Paquette, Sarah
- Subjects
RECIDIVISTS ,LAW enforcement ,CRIMINAL records ,JUSTICE administration ,CRIMINOLOGY - Abstract
Approximately one in seven homicides globally is committed by a partner within an intimate relationship. While criminology research on intimate partner homicide (IPH) perpetrators is extensive, their interactions with law enforcement remain underexplored. This study examines the criminal trajectories of IPH perpetrators to ascertain whether they exhibit common or diverse patterns. Utilizing data from Quebec's official criminal events database, the study analyzes variables concerning the criminal histories of 1,780 individuals involved in attempted or completed IPH through latent profile analysis. Findings indicate five distinct profiles among IPH perpetrators: one-time, low-volume intimate partner violence (IPV), moderate-volume IPV, high-volume violence, and high-volume polymorphous perpetrators. The external validity of these profiles is assessed using additional criminal career, contextual, and situational variables. Implications for the justice system's practices and challenges are also discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
15. Insights into the Diversity and Distribution of Gastropods in River Kana Damodar (Kaushiki), West Bengal, India: A Spatial Perspective.
- Author
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Ghosh, Pratyush
- Subjects
HIERARCHICAL clustering (Cluster analysis) ,CLUSTER analysis (Statistics) ,GASTROPODA ,SAMPLING methods - Abstract
Copyright of Egyptian Journal of Aquatic Biology & Fisheries is the property of Egyptian Society for Fisheries Development & Human Health 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
- Full Text
- View/download PDF
16. Community detection on elite mathematicians' collaboration network.
- Author
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Huang, Yurui, Wang, Zimo, Tian, Chaolin, and Ma, Yifang
- Subjects
MATHEMATICIANS ,MATHEMATICS ,COMPARATIVE studies ,ALGORITHMS ,ANGLES - Abstract
This study focuses on understanding the collaboration relationships among mathematicians, particularly those esteemed as elites, to reveal the structures of their communities and evaluate their impact on the field of mathematics. Two community detection algorithms, namely Greedy Modularity Maximization and Infomap, are utilized to examine collaboration patterns among mathematicians. We conduct a comparative analysis of mathematicians' centrality, emphasizing the influence of award-winning individuals in connecting network roles such as Betweenness, Closeness, and Harmonic centrality. Additionally, we investigate the distribution of elite mathematicians across communities and their relationships within different mathematical sub-fields. The study identifies the substantial influence exerted by award-winning mathematicians in connecting network roles. The elite distribution across the network is uneven, with a concentration within specific communities rather than being evenly dispersed. Secondly, the research identifies a positive correlation between distinct mathematical sub-fields and the communities, indicating collaborative tendencies among scientists engaged in related domains. Lastly, the study suggests that reduced research diversity within a community might lead to a higher concentration of elite scientists within that specific community. The study's limitations include its narrow focus on mathematicians, which may limit the applicability of the findings to broader scientific fields. Issues with manually collected data affect the reliability of conclusions about collaborative networks. This study offers valuable insights into how elite mathematicians collaborate and how knowledge is disseminated within mathematical circles. Understanding these collaborative behaviors could aid in fostering better collaboration strategies among mathematicians and institutions, potentially enhancing scientific progress in mathematics. The study adds value to understanding collaborative dynamics within the realm of mathematics, offering a unique angle for further exploration and research. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
17. A Forecast of the HIV Clinician Workforce Need in the United States: Results of a Quantitative National Survey.
- Author
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Norberg, Andrea, Nelson, John, Haiqun Lin, Lazo, Elizabeth, Stanislaus, Dominic, Chu, Carolyn, and Bolduc, Philip
- Published
- 2024
- Full Text
- View/download PDF
18. Distribution pattern of soil nematode communities along an elevational gradient in arid and semi-arid mountains of Northwest China.
- Author
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Jingliang Chen, Yafeng Zhang, Chao Liu, and Lei Huang
- Subjects
SOIL ecology ,SOIL nematodes ,SPATIAL ecology ,MOUNTAIN ecology ,SOIL depth ,POTASSIUM - Abstract
Soil nematodes are the most abundant soil metazoans, occupying multiple trophic levels in the soil food web and playing an important role in soil function. Research on the biogeographic distribution patterns of soil nematode communities and their drivers has received greater attention. However, the distribution characteristics of soil nematode communities along the elevational gradient in the arid and semi-arid regions of Northwest China remain unclear. In this study, four elevational gradients (1750-1900, 1900-2100, 2100-2350 and 2350-2560 m) were established on Luoshan Mountain, Ningxia, an arid and semi-arid region in Northwest China, and soil nematodes in the soil layers of 0-10, 10-20 and 20-40 cm were investigated using the improved Baermann funnel method. The results revealed a monotonically decreasing trend in the total number of soil nematodes along the elevational gradient and soil layer depth, decreasing by 63.32% to 79.94% and 73.59% to 86.90%, respectively, while the interactions were not obvious. A total of 1487 soil nematodes belonging to 27 families and 32 genera were identified across the elevational gradient, with Helicotylenchus as the dominant genus, accounting for 10.43% of the total number of nematodes, and bacterivore nematodes as the main trophic groups, accounting for 32.39% to 52.55% of the relative abundance at each elevation, which increased with increasing elevation. Soil nematode community diversity, richness and maturity indices were relatively low at high elevation and decreased by 44.62%, 48% and 54.74%, respectively, with increasing soil layer depth at high elevations. Compared to low elevations, high-elevation soils experienced greater disturbance, reduced structural complexity and nutrient enrichment of the soil food web, and a shift in soil organic matter decomposition from bacterial to fungal pathways as elevation increased. Finally, redundancy analysis showed that soil pH, bulk density, soil moisture, soil organic carbon, available nitrogen, available phosphorus and available potassium were the main soil factors affecting the composition of soil nematode communities, which well explained the differences in nematode communities at different elevations and soil depths. This study can be used as basic information for further research on soil biota in this mountainous region, expanding our further understanding of the spatial ecology of soil nematodes in the arid and semi-arid mountain ecosystems. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
19. Important fish diversity maintenance status of the tributaries in a hotspot fish conservation area in the upper Yangtze River revealed by eDNA metabarcoding.
- Author
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Shen, Yanjun, Zhou, Xinxin, Zhang, Yufeng, Zhang, Jiaming, Li, Qinghua, Chen, Qiliang, Liu, Zhihao, Li, Yingwen, Cheng, Ruli, and Luo, Yang
- Abstract
This study employed Environmental DNA (eDNA) barcoding technology to delve into the influence of the tributaries and mainstem on fish diversity and spatiotemporal distribution in a hotspot fish conservation area in the upper Yangtze River. A total of 123 fish species were detected, belonging to 7 orders, 19 families, and 77 genera. The composition of fish species in tributaries is similar to that in mainstem, with higher fish community diversity in tributaries during the spring and summer. Exploration of fish ecotypes revealed significant differences between mainstem and tributaries. The fish community is mainly influenced by key environmental factors such as water temperature, dissolved oxygen, electrical conductivity, and ammonia nitrogen, with a higher impact of these factors on tributaries than on mainstem. In conclusion, while tributaries and mainstem in the Jiangjin section exhibit similarities in fish community composition, there are notable differences in community structure and diversity. Therefore, the protection of not only mainstem but also tributaries and their associated fish habitats is crucial for promoting the overall health and sustainability. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
20. Ornamental Fish Diversity in Some Selected Water Bodies of the Upper Brahmaputra Basin in Assam, India.
- Author
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Deb, Shatabdi, Sonowal, Jyotirmoy, and Biswas, Shyama Prasad
- Published
- 2024
- Full Text
- View/download PDF
21. Advancement in Carbon Nanotubes Optoelectronic Devices for Terahertz and Infrared Applications.
- Author
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Wang, Yue, Sun, Guangcheng, Zhang, Xiaoju, Zhang, Xiang, and cui, Zijian
- Abstract
Benefiting from the outstanding optical, thermal, electrical, and mechanical properties, carbon nanotubes (CNTs) hold significant potential in the fields of materials, physics, chemistry, biology, as well as emerging disciplines such as electronics and optoelectronics. This paper provides a comprehensive review of the latest developments of CNTs optoelectronic devices operating in the terahertz (THz) and infrared (IR) wave range. At the beginning of this review, the unique structural characteristics of CNTs are introduced, overviewing their fundamental electronic structure, and emphasizing their impact on optoelectronics behavior. Further, on various synthesis techniques are discussion employed for the growth of single nanotube and the preparation of CNTs films. The penultimate section, the optical properties of CNTs are analyzed within the THz and IR spectral region and overview the application of THz time‐domain spectroscopy in extracting key material parameters of CNTs, and further discuss the theoretical models describing THz conductivity in CNTs. In the end, the most promising CNTs‐based device concepts are highlighted for sources, detectors, modulators, absorbers, and sensors within in THz and IR frequency band. This comprehensive review provides a valuable insight into the utilization of CNTs across various aspects of THz and IR optoelectronic devices. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
22. Household Attributes and Agro Diversity Across Different Land Holdings : A Case Study from Sihphir Village in Mizoram, India.
- Author
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LALCHUNGNUNGI, R., NONGTRI, A., LYNGDOH, N., and UPADHYAYA, K.
- Abstract
Land holding is a strong driver of household attribute, crop diversity and farm management. Present study explores its influence in Sihphir village, Aizawl district of Mizoram by considering three land holding categories viz. marginal land holding (MLH; < 1ha), small land holding (SLH; 1-2ha) and semi medium land holding (SMLH; 2-4ha). Household attributes and farm management were surveyed using a questionnaire on thirty households, while for farm diversity by laying plots in 15 farms under each category. Agriculture is the main occupation across land holding with education skewed to the lower levels among marginal land holders. The percentage of household members involved in agriculture and land allocated for agriculture decreased with larger land holdings. Piggery is the main livestock reared by all land holders with average number of pigs per household ranging from 1.96 ± 1.95 in MLH to 2.46 ± 1.97 in SLH. Total household income increased with land holding, but there was large variation in income from agriculture and livestock within each category with co-efficient of variation values above 50 per cent. A total of 55 food plant species were reported in all farms out of which 28 were trees and 27 herbs. The survey reports 17 species primarily used as source of fruits, 11 as a vegetable and 2 as spices. Tree density was highest in farms of the SLH category. Cleodendrum infortunatumis the most common species in all farms. Tree diversity and dominance indices across farms in various categories of land holding differed marginally in contrast to herbaceous crop species which showed the highest diversity in SMLH. Among the herbaceous crops, Brassica nigra had highest density in all categories. The management practices followed by different land holders did not vary significantly except for the tendency of saving seeds for the next season. [ABSTRACT FROM AUTHOR]
- Published
- 2024
23. Impact of Shifting Cultivation on Phyto-diversity (Vegetation) under Different Land use Systems in Serchhip District, Mizoram, India.
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Lalnungrenga, R., Chandra, Girish, Sankar, M., Lalruatsangi, Esther, and Premkumar, Kangujam
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SHIFTING cultivation ,SOIL fertility ,PLANT diversity ,LAND use - Abstract
The article focuses on the impact of shifting cultivation on phyto-diversity under various land use systems in Serchhip District, Mizoram, India, highlighting its effects on vegetation regeneration, soil fertility, and forest cover. It examines the dynamic socio-ecological system of shifting cultivation, site selection processes, vegetation sampling, and the associated changes in plant diversity across different fallow periods.
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- 2024
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24. Avian Richness, Assemblages and Migration Connectivity of Geese Species with Habitat Suitability in Wetlands of the Punjab, Pakistan.
- Author
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Rasool, Ghulam, Aihetasham, Ayesha, Ali, Zulfiqar, and Ahmad, Rida
- Abstract
Understanding the species assemblages and migration connectivity of geese species is crucial for their conservation and management. It helps identify important stopover sites, breeding grounds, and wintering areas, allowing for targeted conservation efforts and the preservation of key habitats along their migratory routes. This study was designed to investigate the avian richness and habitat suitability of geese species at wetlands of Punjab, Pakistan. The surveys were conducted from October 2020 to March 2021 and October 2021 to March 2022 on monthly basis using point count method. Five species of geese were recorded at the wetlands including bar-headed goose Anser indicus, with the highest number of individuals (2,701 at eleven sites) followed by greylag goose Anser anser (1,224 at nine sites), cotton pygmy-goose Nettapus coromandelianus (74 at eleven sites), greater white-fronted goose Anser albifrons (46 at five sites) and lesser white-fronted goose Anser erythropus (seven at three sites). Overall, 175 species were recorded at the study sites belonging to 13 orders and 39 families. According to the IUCN red list, 148 species were least concern, 16 were near threatened and 11 were threatened (vulnerable (06), endangered (04) and critically endangered (01)). Habitat suitability index was used to rank the suitability of geese species at various sites from highly suitable to least suitable. Marala Headworks was found to be at the top as per habitat suitability score for all geese species, followed by Chashma, Taunsa and Bajwat. Even if these sites are suitable, they fall short of being highly suitable. Thus, maintenance of these locations must be given top priority in order to conserve the goose species that rely on them. [ABSTRACT FROM AUTHOR]
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- 2024
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25. Contingency inferences from base rates: A parsimonious strategy?
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Pivecka, Niklas, Ingendahl, Moritz, McCaughey, Linda, and Vogel, Tobias
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BEHAVIOR modification ,STATISTICAL sampling ,DECISION making ,LEARNING ,DESCRIPTIVE statistics ,REWARD (Psychology) ,ATTENTION ,MEMORY ,ONE-way analysis of variance ,JUDGMENT (Psychology) ,COGNITION - Abstract
The pseudocontingency framework provides a parsimonious strategy for inferring the contingency between two variables by assessing the base rates. Frequently occurring levels are associated, as are rarely occurring levels. However, this strategy can lead to different contingency inferences in different contexts, depending on how the base rates vary across contexts. Here, we examine how base-rate consistency influences base-rate learning and reliance by contrasting consistent with inconsistent base rates. We hypothesized that base-rate learning is facilitated, and that people rely more on base rates if base rates are consistent. In Experiment 1, the base rates across four contexts implied the same (consistent) or different (inconsistent) contingencies. Base rates were learned equally accurately, and participants inferred contingencies that followed the base rates but deviated from the genuine contingencies within contexts, regardless of consistency. In Experiment 2, we additionally manipulated whether the context was a plausible moderator of the contingency. While we replicated the first experiment's results when the context was a plausible moderator, base-rate inferences were stronger for consistent base rates when the context was an implausible moderator. Possibly, when a moderation-by-context was implausible, participants also relied on the base-rate correlation across contexts, which implied the same contingency when base rates were consistent but was zero when the base rates were inconsistent. Thus, our findings suggest that contingency inferences from base rates involve top-down processes in which people decide how to use base-rate information. [ABSTRACT FROM AUTHOR]
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- 2024
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26. Gastrointestinal microbiota and metabolites responses to dietary cereal grains in an adult pig model.
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Ganyi Feng, Menglong Deng, Rui Li, Gaifeng Hou, Qing Ouyang, Xianji Jiang, Xiaojie Liu, Hui Tang, Fengming Chen, Shihua Pu, Dan Wan, and Yulong Yin
- Subjects
SHORT-chain fatty acids ,COLONIZATION (Ecology) ,MICROBIAL communities ,AEROBIC bacteria ,MICROBIAL diversity - Abstract
Corn (C), wheat (W), and paddy rice (PR) are important energy sources and are commonly used in feed production for swine. This study mainly focuses on the variation and regularities of microbiota and metabolites in the gastrointestinal tract (GIT) of pigs in response to C, W, and PR. A total of 18 pigs were allotted into three dietary groups with six replicated pigs and received diets containing C, W, or PR as the sole energy source, respectively. The results showed that digestive parts significantly affected the diversity of microbial communities. Cereal grain sources significantly influenced the β-diversity of microbial communities in the colon and rectum. Campylobacterota and Proteobacteria are mainly distributed in the duodenum, Lactobacillus in the jejunum, and Bacteroidota in the colon and rectum. The W diet increased the Bacteroidota, Spirochaetota, and Prevotellaceae_NK3B31_group abundances and showed the highest concentrations of all short-chain fatty acids (SCFAs) in the hindgut. Fibrobacterota, Bacteroidota, Spirochaetota, Prevotellaceae_NK3B31_group, Prevotella, and Treponema in the colon or rectum were positively correlated with acetate, propionate, butyrate, and total SCFAs. These findings suggested that aerobic bacteria and facultative anaerobes in the foregut will gradually be replaced by anaerobes in the hindgut. The W diet had the best fermentability and was beneficial to the colonization of microbial communities that mainly used carbohydrates. The hindgut flora of the PR diet group may be more balanced with fewer potential pathogenic bacteria. Many microbial communities have been identified to contribute positively to the SCFA production of the hindgut. Collectively, our study revealed the spatial variation regularities of GIT microbial communities in an adult pig model and provided new insights into GIT microbiota and responses of metabolites to cereal grain diets. [ABSTRACT FROM AUTHOR]
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- 2024
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27. Diversity and Relative Abundance of Insect Pollinators on Pigeon Pea (Cajanus cajan L.) in Gajapati District of Odisha.
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Padhy, Deepayan, Satapathy, Chitta Ranjan, Borkataki, Shimantini, Shankar, Tanmoy, and Ray, Soumik
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INSECT pollinators ,LEGUMES ,ANGIOSPERMS ,POLLEN ,NECTAR ,POLLINATORS ,POLLINATION ,PIGEON pea - Abstract
Background: Many cross pollinated flowering plants rely on pollinators for reproduction and survival. The pigeon pea (arhar), Cajanus cajan L., is the India's most important pulse crop. It attracts pollinators because to its cross pollination nature, possible nectar and pollen source, attractive colour and scent of the seeds and timing of blossoming. As a result, a complete research of pigeon pea insect pollinator fauna shall be used to conserve those fauna for increasing pigeon pea pollination effectiveness. Methods: Diversity of different pollinating agents associated with the crop pigeon pea by observing their abundance, diversity, percentage contribution, dominance status and diversity following the statistical diversity indexes were recorded during Kharif, 2021-22 in the state of Odisha where the insect pollinators' fauna was recorded through fixed plot survey. Result: Megachille lanata (Fabricius) was found to be the most dominant pollinator throughout the flowering period among seven different pollinators of order Hymenoptera. M. lanata and Megachille disjuncta (Fabricius) shown higher foraging activity i.e. 6.02 bees/5 min/m2 and 4.25 bees/5 min/m2 respectively. Subdominant class represented maximum species among different dominant status classes exhibited. Very less diversity was observed throughout the season but still more diversity has been observed at mid flowering stags during 10:00-11:00 AM. [ABSTRACT FROM AUTHOR]
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- 2024
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28. Sal-dominated Forests Influence the Floristic Composition, Diversity and Distribution Pattern with Special Focus on the Associated Trees in the Eastern Ghats of Odisha.
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BEHERA, MADHAB CHANDRA, SAHOO, UTTAM KUMAR, MOHANTY, TANMAY LALITENDU, and NAYAK, SASWAT
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- 2024
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29. Hydrology and trophic flexibility structure alpine stream food webs in the Teton Range, Wyoming, USA.
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Jorgenson, Karen L., Hotaling, Scott, Tronstad, Lusha M., Finn, Debra S., and Collins, Sarah M.
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RESOURCE availability (Ecology) ,CLIMATE change ,FOOD chains ,WATER temperature ,STABLE isotopes - Abstract
Understanding biotic interactions and how they vary across habitats is important for assessing the vulnerability of communities to climate change. Receding glaciers in high mountain areas can lead to the hydrologic homogenization of streams and reduce habitat heterogeneity, which are predicted to drive declines in regional diversity and imperil endemic species. However, little is known about food web structure in alpine stream habitats, particularly among streams fed by different hydrologic sources (e.g., glaciers or snowfields). We used gut content and stable isotope analyses to characterize food web structure of alpine macroinvertebrate communities in streams fed by glaciers, subterranean ice, and seasonal snowpack in the Teton Range, Wyoming, USA. Specifically, we sought to (1) assess community resource use among streams fed by different hydrologic sources, (2) explore how variability in resource use relates to feeding strategies, and (3) identify which environmental variables influenced resource use within communities. Average taxa diet differed among all hydrologic sources, and food webs in subterranean ice‐fed streams were largely supported by the gold alga Hydrurus. This finding bolsters a hypothesis that streams fed by subterranean ice may provide key habitat for cold‐water species under climate change by maintaining a longer growing season for this high‐quality food resource. While a range of environmental variables associated with hydrologic source (e.g., stream temperature) were related to diet composition, hydrologic source categories explained the most variation in diet composition models. Less variable diets within versus among streams suggest high trophic flexibility, which was further supported by high levels of omnivory. This inherent trophic flexibility may bolster alpine stream communities against future changes in resource availability as the mountain cryosphere fades. Ultimately, our results expand understanding of the habitat requirements for imperiled alpine taxa while empowering predictions of their vulnerability under climate change. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
30. School (socie)ties: individual and school level differences in the association between ethnic/racial victimization and academic functioning.
- Author
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da Cunha, Josafá M. and Santo, Jonathan B.
- Subjects
DISCRIMINATION in education ,BRAZILIANS ,SCHOOL environment ,DIVERSITY in education ,CULTURAL pluralism - Abstract
Introduction: The current study aimed to expand on the existing literature by examining the effect of race-based victimization on academic functioning in a nation-wide sample of Brazilian youth. Methods: The ENEM 2009 dataset contained academic functioning scores of 795,924 Brazilian students from 25,488 schools. Results: Above and beyond the effect of general victimization, ethnic/racial victimization was significantly negatively related to academic functioning with differences across ethnic/racial groups in the effects. More interesting is that diversity climate at the school level buffered the association between ethnic/racial victimization and academic functioning. The effects were further qualified by school level ethnic/racial diversity and victimization. Discussion: The current findings illustrate the pernicious effects of ethnic/racial victimization even after controlling for other forms of victimization. Moreover, differences in these associations across schools were accounted for using a combination of school level racial diversity and victimization with school level diversity climate emerging as a buffer of the effects of ethnic/racial victimization. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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- View/download PDF
31. Understanding Mosquito Faunal Diversity: An Approach to Assess the Burden of Vector‐Borne Diseases in Three Representative Topographies (Rural, Urban, and Peri‐Urban) of Ganjam District in Odisha State, India.
- Author
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Panda, Deepika, Pandit, Rabi Sankar, Sahu, Bijayalaxmi, Kamaraju, Raghavendra, Barik, Tapan Kumar, and Chowdhury, Rajib
- Subjects
ANIMAL diversity ,AEDES aegypti ,ANOPHELES stephensi ,SPECIES diversity ,CULEX quinquefasciatus - Abstract
Mosquitoes are the best‐known disease vectors for most vector‐borne diseases that significantly impact global health in terms of morbidity and mortality. In a geographical area, mosquito faunal diversity often alters with changing climatic factors and variable breeding habitats that differ across seasons. Using biodiversity indicators as tools, a study was conducted in rural, peri‐urban, and urban areas of district Ganjam, Odisha state, to determine mosquito faunal diversity as an approach to forecast the possible risk of disease transmission in the three representative topographies. A two‐year study was undertaken to assess the alpha diversity of mosquito species by the numerical strength of the species using various eco‐diversity indices. Species richness and abundance of mosquito species are significantly higher in peri‐urban areas compared to urban and rural areas. The species dominance of Culex quinquefasciatus was observed in all three topographies, while Aedes aegypti, Aedes albopictus, and Anopheles stephensi were in urban areas. Species richness may dilute the risk of disease in an area, but increased species dominance, mostly vector species, in a new habitat often allows pathogens to infect newer communities at risk, leading to the emergence of new diseases. The current study indicates the possible risk of lymphatic filariasis (LF) infection in all three topographies. On the other hand, the risk of malaria and dengue/chikungunya transmission is higher in urban areas. With routine entomological monitoring, including vector incrimination, the biodiversity indicators will be the best tool to forecast the risk of vector‐borne diseases in an area; accordingly, judicious vector control strategies can be adopted. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
32. Envirotyping helps in better understanding the root cause of success and limitations of rainfed production systems.
- Author
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Sawargaonkar, Gajanan L., Davala, Moses Shyam, Rakesh, S., Kamdi, Prasad J., Khopade, Rohan Y., Nune, Rajesh, Pasumarthi, Rajesh, Choudhari, Pushpajeet, Datta, Aviraj, Akuraju, Venkata Radha, Dixit, Sreenath, Singh, Ramesh, and Jat, Mangi Lal
- Subjects
CARBON in soils ,SOIL degradation ,AGRICULTURE ,ROOT cause analysis ,CROP yields - Abstract
The current diagnostic agronomy study of the Bankura region of West Bengal, India, examined the variations in crop yields through a socio-ecological analysis of multiple production systemcomponents. Envirotyping for root cause analysis was employed to delve into the variables that affect the performance of rainfed production systems. Mother Earth, man, machine, management, andmaterials (5Ms concept) were the five indicators under which the variables were grouped. Findings demonstrated the fragility of the region's soils due to its undulating terrain, unpredictable rainfall patterns, and frequent drought scenarios. The LULC's NDVI showed that the agricultural area is about 60% and 43% of the total geographical area in the Hirbandh and Ranibandh blocks, respectively. Soils are acidic and diagnosed with deficiency of both macro and micronutrients (phosphorous, sulfur, and boron) having poor water holding capacity (35 to 55 mm for a 50 cm soil depth). The sand and soil organic carbon contents ranged between 43.04%-82.32% and 0.17%-1.01%, respectively with a low bacterial population. These factors are the root cause for low cropping intensity (106%) and low paddy productivity (3,021 kg/ha). Overall, the study contributes to designing and scaling-up of sustainable landscape management practices that could ensure higher cropping intensity and system productivity in similar agro-ecologies with limited evidence. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
33. New insights into the structure and function of microbial communities in Maxwell Bay, Antarctica.
- Author
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Zheng Wang, Zhiwei Gao, Yong Yu, Huirong Li, Wei Luo, Zhongqiang Ji, and Haitao Ding
- Subjects
ECOLOGICAL disturbances ,MICROBIAL communities ,ECOSYSTEM dynamics ,MICROBIAL diversity ,NUCLEOTIDE sequencing - Abstract
The microbial communities inhabiting polar ecosystems, particularly in Maxwell Bay, Antarctica, play a pivotal role in nutrient cycling and ecosystem dynamics. However, the diversity of these microbial communities remains underexplored. In this study, we aim to address this gap by investigating the distribution, environmental drivers, and metabolic potential of microorganisms in Maxwell Bay. We analyzed the prokaryotic and eukaryotic microbiota at 11 stations, revealing distinctive community structures and diverse phylum dominance by using high-throughput sequencing. Spatial analysis revealed a significant impact of longitude on microbial communities, with microeukaryotes exhibiting greater sensitivity to spatial factors than microprokaryotes. We constructed cooccurrence networks to explore the stability of microbial communities, indicating the complexity and stability of microprokaryotic communities compared with those of microeukaryotes. Our findings suggest that the microeukaryotic communities in Maxwell Bay are more susceptible to disturbances. Additionally, this study revealed the spatial correlations between microbial communities, diversity, and environmental variables. Redundancy analysis highlighted the significance of pH and dissolved oxygen in shaping microprokaryotic and microeukaryotic communities, indicating the anthropogenic influence near the scientific research stations. Functional predictions using Tax4Fun2 and FUNGuild revealed the metabolic potential and trophic modes of the microprokaryotic and microeukaryotic communities, respectively. Finally, this study provides novel insights into the microbial ecology of Maxwell Bay, expanding the understanding of polar microbiomes and their responses to environmental factors. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
34. The skin microbiome as a new potential biomarker in the domestication and health status of Octopus vulgaris.
- Author
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Costas-Imbernón, Daniel, Costas-Prado, Carolina, Sequeiro, Teresa, Touriñán, Pablo, García-Fernández, Pablo, Tur, Ricardo, Chavarrías, David, Saura, María, and Rotllant, Josep
- Subjects
COMMON octopus ,ANIMAL communities ,SUSTAINABLE aquaculture ,BIOTIC communities ,ANIMAL welfare - Abstract
Over the past decade, there has been a growing interest in common octopus aquaculture, prompted by several factors such as the increase in market demand, the decline in overall fisheries and the search for more sustainable food resources. Nevertheless, this interest has raised concerns about the potential impact of largescale production and intensified farming practices in the future. This study aims to establish a baseline understanding of the natural microbial communities that inhabit skin mucus of the common octopus, describe its core microbiota, and assess the impact of captive rearing on these communities and animal welfare. The skin microbiome of wild-captured octopuses was compared with that of reared in aquaculture using 16S ribosomal RNA metabarcoding. The findings show that the core microbiota of octopus mucosal skin is dominated by the phyla Bacteroidota and Pseudomonadota, with Aurantivirga, Pseudofulvibacter, and Rubritalea being the most abundant genera. Despite differences in abundance, the microbiota composition and diversity between wild and aquaculture octopuses were similar. Wild samples had an enrichment of Gammaproteobacteria, including potentially pathogenic species such as Vibrio spp., Photobacteriumswingsii, and Lactococcus garvieae, which were less prevalent or absent in aquaculture samples. KEGG functional pathways predictions indicated a higher enrichment in functional pathways related to xenobiotic remediation in wild samples, reflecting their need to adapt to a more variable and potentially contaminated environment. This is the first study to characterize the mucosal skin microbiome of the common octopus and to compare wild and aquaculture specimens. The results suggest that current aquaculture practices support animal welfare through the use of controlled hatchery environments and high-quality water conditions. These insights are valuable for the development of sustainable and responsible aquaculture practices, with the octopus microbiome serving as a potential biomarker for health status and animal welfare. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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- View/download PDF
35. Are the males of Dendropsophus minutus (Peters, 1872) spider devourers?
- Author
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Pereira Ferreira, João Lucas, de Castro Araújo, Kássio, Barroso de Andrade, Etielle, and Vinícius Mira-Mendes, Caio
- Abstract
In this study, we described the diet composition of males of the treefrog Dendropsophus minutus from the region of the Chapada das Mesas National Park, Maranhão, Northeastern Brazil. We collected 19 males, of which 17 had stomach contents. Of that, five prey categories were registered, with spiders being the most consumed prey item. We also observed that the snout-vent length of each male had a weak influence on prey selection. Notably, D. minutus consumed a substantial quantity of spiders. Nonetheless, further studies considering temporal variation, reproductive period, and prey availability, among others, are still needed to elucidate the role of spiders on the diet of D. minutus. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
36. Mineralisation controls for the diverse Cape manganese occurrences, South Africa.
- Author
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von der Heyden, B. P., La Cock, R. A., Ferreira, D. R., Conradie, T. A., van Rooyen, J. D., and Palcsu, L.
- Subjects
HOT springs ,OROGENIC belts ,ORE deposits ,WATER springs ,GEOCHEMICAL cycles - Abstract
The Cape Fold Belt, comprising folded sedimentary sequences from predominantly the Palaeozoic Cape Supergroup, hosts a multitude of manganese occurrences and mineral deposits, many of which were subject to historical mining activity. Although size, grade and quality issues negate their modern-day exploitation for the steel-making process, the mechanisms by which Mn has enriched at these sites holds scientific value for our understanding of lowtemperature Mn (bio-)geochemical cycling. Deposits located within the Cape Fold Belt comprise structure-hosted Mn deposits and a little described class of Mn mound deposits associated with chalybeate thermal springs (temperature = 41 to 48°C). Although the relationships between the two remain tenuous, detailed study of both classes provides insight into the conditions that favour Mn accumulation in the near-surface and sub-aerial environments. Comparisons between the physicochemistry of manganiferous- and non-manganiferous thermal springs suggest that manganese solubility is favoured by warm, acidic and slightly reducing fluids with elevated salinity. Transport, and associated fluid focusing typically within highly permeable sandstone units, serves to locate Mn mineralisation in near-surface structurally-complex trap sites that provide both accommodation space and conditions that are sufficiently oxidising. Where manganiferous spring waters spill out at surface, oxidation is caused by contact with atmospheric O2 to form Mn mound deposits, and ambient Mn-oxidising microbiota (e.g., genus Ramlibacter, and members of Burkholderiales, Rhodocyclaceae, and Oxalobacteraceae) are likely to play a role in enhancing the kinetics of this process. Relative to the structure-hosted deposits, these Mn mound deposits are typically lower grade (higher iron content) and relatively friable (high porosity and fine grain sizes). Supergene and diagenetic processes can lead to localised upgrade of the Mn mound material, although typically not to ore grade. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
37. Diversity analysis: Richness versus evenness.
- Author
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Kvålseth, Tarald O.
- Subjects
SPECIES distribution ,STATISTICAL sampling ,BIODIVERSITY - Abstract
Richness and evenness, two important components of diversity, have been the subject of numerous studies exploring their potential dependence or lack thereof. The results have been contradictory and inconclusive, but tending to indicate only a low (positive or negative) correlation. While such reported studies have been based on particular data sets and species abundance distributions, the present article provides the results of a study using randomly generated abundance distributions and hence more generalizable findings and valid statistical results. The results reveal no statistically significant correlation between richness and evenness based on such random sample of abundance distributions and on four well‐known measures of diversity, including Simpson's indices and the entropy index. Of the two diversity components, evenness is found to have the strongest influence on diversity, but for numbers‐equivalent or effective‐number formulations, richness tends to be the most influential diversity component. For analyzing the tradeoff between richness and evenness for any given diversity measure and abundance distribution, the richness‐evenness curve is introduced as a new tool for diversity analysis. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
38. Zebrafish (Danio rerio) behavioral phenotypes are not underscored by different gut microbiomes.
- Author
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Ayayee, Paul A. and Wong, Ryan Y.
- Subjects
ANIMAL behavior ,ZEBRA danio ,MICROBIAL diversity ,NORMATIVITY (Ethics) ,PHENOTYPES ,GUT microbiome - Abstract
Although bold and shy behavioral phenotypes in zebrafish (Danio rerio) have been selectively bred and maintained over multiple generations, it is unclear if they are underscored by different gut microbiota. Using the microbiota–gut–brain concept, we examined the relationship between gut microbiota and the behavioral phenotypes within this model animal system to assess possible gut microbe‐mediated effects on host behavior. To this end, we amplified and sequenced 16S rRNA gene amplicons from the guts of bold and shy zebrafish individuals using the Illumina Miseq platform. We did not record any significant differences in within‐group microbial diversity nor between‐group community composition of the two behavioral phenotypes. Interestingly, though not statistically different, we determined that the gut microbial community of the bold phenotype was dominated by Burkholderiaceae, Micropepsaceae, and Propionibacteriaceae. In contrast, the shy phenotype was dominated by Beijerinckaceae, Pirelullacaeae, Rhizobiales_Incertis_Sedis, and Rubinishaeraceae. The absence of any significant difference in gut microbiome profiles between the two phenotypes would suggest that in this species, there might exist a stable core gut microbiome, regardless of behavioral phenotypes, and possibly, a limited role for the gut microbiota in modulating this selected‐for host behavior. This study characterized the gut microbiomes of distinct innate behavioral phenotypes of the zebrafish (that are not considered dysbiotic states) and did not rely on antibiotic or probiotic treatments to induce changes in behavior. Such studies are crucial to our understanding of the modulating impacts of the gut microbiome on normative animal behavior. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
39. Fisheries Bycatch in a Tropical Mangrove Forest, with a Focus on Gobies: a Case Study in Xuan Thuy National Park, Vietnam.
- Author
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Long Van Pham, Linh Manh Ha, Hai Hong Nguyen, Nguyen Xuan Huan, Anh Ngoc Thi Do, and Hau Duc Tran
- Subjects
SIZE of fishes ,TROPICAL forests ,GOBIIDAE ,VALUE (Economics) ,NATIONAL parks & reserves ,MANGROVE forests - Abstract
The goby fish is dominant in tropical mangrove estuaries like Xuan Thuy National Park in Vietnam, where fishing is allowed in the core area, but the lack of regulations targeting specific species and landing sizes contributes to bycatch issues. To address this, we conducted a one-year survey to investigate non-target and undersized fish bycatch. Based on collections using a series trap nets from March 2018 to February 2019, it revealed a relatively diverse goby community consisting of 28 species, with the most abundant being Glossogobius olivaceus and Bostrychus sinensis in the study site. Among the captured species, 16 (57.14%) had no economic value and were bycatch. Additionally, between 5.46% and 92.31% of individuals from each species had a standard length below the optimum length, including the three primary target species, B. sinensis, G. olivaceus, and G. giuris, with 88.81%, 90.95%, and 92.31% of individuals being smaller than the optimum length. The goby community in the study area faces severe bycatch issues concerning both non-target species and undesired size. As the body depth - standard length relation model estimated the optimum body depth of target species to be larger than 15 mm when the optimum length is used, we propose using fishing gear with a mesh size of 15 mm for sustainable fishing. [ABSTRACT FROM AUTHOR]
- Published
- 2024
40. Avian Species Diversity in Terrestrial and Aquatic Habitats in Certain Areas of Egypt.
- Author
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Semida, Fayez, Orabi, Gamal, Medany, Doaa, Kamel, Mohamed, and Issa, Mohamed
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MIGRATORY animals ,ECOLOGICAL impact ,NUMBERS of species ,ENGLISH sparrow ,BIRD diversity ,MIGRATORY birds - Abstract
Ecologically, the presence of avifauna is a crucial indicator of ecosystem equilibrium. The diversity of bird species and their community structure serves as an essential tool for assessing ecological impacts. This study aimed to evaluate the species composition, evenness, and diversity of wild bird species across different habitats in Egypt from May 2023 to February 2024. The study identified 17,387 individuals from 40 resident bird species belonging to 25 families and 10 orders. The house sparrow exhibited the highest relative abundance among resident bird species, followed by the western cattle egret, barn swallow, house crow, rock pigeon, little egret, hooded crow, laughing dove, and common myna. In terms of migratory birds, 6,050 individuals from 39 species across 22 families and 11 orders were observed. The slender-billed gull, little stint, great cormorant, common ringed plover, the European beeeater, black-winged stilt, and white wagtail had the highest relative abundances among migratory species. The distribution of bird species across different sites revealed that the coastal area (CA) and the Suez Canal & Gulf Suez (SCGS) each harbored 25% of the total number of resident species, followed by the Nile Delta (ND) with 21%, the Nile Valley (NV) with 16%, and the Faiyum (F) area with 13%. For migratory birds, the CA accounted for 48% of all migratory species, followed by the F area at 23%, ND at 13%, SCGS at 11%, and NV at 5%. The highest species richness was recorded in the CA, followed by SCGS, ND, F, and NV. The highest values for the Shannon and Simpson indices were found in the CA, NV, ND, SCGS, and F areas, respectively. It can be concluded that the Egyptian environment, especially aquatic habitats, is a valuable resource for the Egyptian avifauna by providing food sources and nesting sites. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
41. Habitat Inventory, Diversity and Structural Modification of Hill-Stream Fishes of Noa Dihing River, Eastern Himalayan Hotspot, Arunachal Pradesh, Northeast India.
- Author
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Gogoi, Simi, Dutta, Manash Pratim, and Singh, Moirangthem Kameshwor
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FISH diversity ,FISH adaptation ,ECOSYSTEM dynamics ,PRINCIPAL components analysis ,SPECIES diversity ,HABITAT modification - Abstract
This study monitored the spatial and temporal fluctuations in the riverine ecosystem of Noa Dihing, Arunachal Pradesh, over three years (October 2020 to December 2023). The habitat quality of the riparian ecosystem, along with key physicochemical parameters (such as temperature, pH, dissolved oxygen, and others), organic matter composition (OMC), substrate composition, and fish species diversity, was assessed seasonally. The habscore and riverine habitat quality index (RHQI) were recorded the highest in the upstream regions (8.00 and 0.85, respectively), while OMC was the highest in the downstream (7.51). Fish biodiversity was evaluated through indices like the Shannon-Wiener diversity index, which peaked at 3.60 in the post-monsoon, and the Margalef richness index, which reached 6.61 in the same season. Simpson's dominance index showed its highest value in winter (0.7), while the evenness index was the greatest in the post-monsoon (0.90). Altogether, 46 fish species from 5 orders were recorded, with Cyprinids being the dominant group. The study utilized Duncan's multiple range test (DMRT) (P≤ 0.05) to confirm the importance of water quality in shaping fish assemblages. Principal component analysis (PCA) on physicochemical parameters explained over 60% of the total variance, with eigenvalues greater than 1.0. Species such as those from the genera Balitora, Garra, Sisor, and Oreichthys exhibited notable structural adaptations to their environment, while species like Pseudoecheneis and Glyptothorax showed thoracic modifications, and Chagunius, Garra, and Paracanthocobitis bore suctorial discs for adhesion. This comprehensive study illustrates the diverse ecological dynamics of the Noa Dihing River, emphasizing the critical role of habitat quality and physicochemical factors in influencing fish diversity and adaptation. [ABSTRACT FROM AUTHOR]
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- 2024
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42. Environmental Driving Mechanism and Response of Soil's Fungal Functional Structure to Near-Naturalization in a Warm Temperate Plantation.
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Qiu, Zhenlu, Liu, Huan, Chen, Chunli, Liu, Congcong, and Shu, Jing
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PLANT succession ,SECONDARY forests ,ECOSYSTEMS ,PLANT communities ,ECTOMYCORRHIZAL fungi - Abstract
In this study, the near-naturalization process of Pinus tabulaeformis plantations in Baxianshan National Nature Reserve was divided into three stages depending on the proportion of P. tabulaeformis present, resulting in the following categories: the P. tabulaeformis forest stage, the mixed forest stage, and the near-natural forest stage. Natural secondary forests were selected as a control. We assessed alterations in the soil's fungal functional structures from three aspects: functional mode, vegetative mode, and growth mode, and their responses to vegetation and soil factors were also explored. The results showed that ectomycorrhizal, saprophytic, and plant pathogen types were dominant in the functional mode, and plant pathogens were most abundant in the P. tabulaeformis forest stage. Meanwhile, ectomycorrhizal fungi were the least abundant in the near-natural forest stage. In the vegetative mode, saprophytic, pathophysiological, and symbiotic types were dominant, and pathophysiological types were the most abundant in the P. tabulaeformis forest stage. In the growth mode, microfungi dominated, and the abundance of clavarioid decreased with near-naturalization. The degree of variation in functional structure in the three dimensions increased with near-naturalization, but the structure of natural secondary forests converged. The species composition of tree layer obviously affected the abundance and functional structure of fungi in the three modes, among which Quercus mongolia and Carpinus hornbeam were the most significant. The soil's pH and nitrate content significantly affected the structure of the functional mode, and the soil's dry matter content and C/N ratio significantly affected the structure of the vegetative mode. In this study, we explored the interaction between the plant community and soil ecological system during the near-naturalization process of plantations in terms of soil fungi functions, further clarifying the role of soil functions in the succession of plant communities and providing a new perspective on the in-depth exploration of ecosystem interactions during the succession of plantations. [ABSTRACT FROM AUTHOR]
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- 2024
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43. 不同田边植草带对地表节肢动物群落结构的影响.
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刘仟龙, 罗林华, 孙傲, 张海芳, 王慧, 张艳军, 杨殿林, 张成龙, and 赵建宁
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BIOLOGICAL pest control ,WOOD lice (Crustaceans) ,INDUCTIVE effect ,ARTHROPOD diversity ,ARABLE land - Abstract
Copyright of Journal of Agricultural Resources & Environment / Nongye Ziyuan yu Huanjing Xuebao is the property of Journal of Agricultural Resources & Environment Editorial Board 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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44. 间伐措施对松材线虫病疫区马尾松林土壤微生物多样性的影响.
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李留彬, 方文, 马玲, 安一博, 潘超, 鲜李虹, 董智, 韦丹, and 熊兴政
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CONIFER wilt ,FOREST soils ,ENVIRONMENTAL security ,FOREST thinning ,LOGGING - Abstract
Copyright of Forest Engineering is the property of Forest Engineering Editorial Office 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
- Full Text
- View/download PDF
45. Measuring metrics: what diversity indicators are most appropriate for different forms of data bias?
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Qiao, Huijie, Orr, Michael C., and Hughes, Alice C.
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BIRD diversity ,STANDARDIZED tests ,VIRTUAL reality ,CITIZEN science ,MACROECOLOGY - Abstract
Biodiversity metrics have become a ubiquitous component of conservation assessments across scales. However, whilst indices have become increasingly widely used, their ability to perform in the face of different biases has remained largely untested under realistic conditions. Citizen science data are increasingly available, but present new challenges and biases, thus understanding how to use them effectively is essential. Here, we built a virtual world incorporating BirdLife data and accounting for their biases, then explored how well commonly‐used diversity metrics could estimate known values across a suite of representative scenarios. We used predictive modelling to model bird diversity globally and overcome biases using the approaches found most accurate in prior assessments. Performance was highly variable across the different types of biases, but in many instances Simpson's index performed best, followed by Hill numbers, whereas Pielou's index was almost universally worst. From standardised tests, we then applied these metrics to eBird data using 611 520 112 samples of 10 359 species of bird (around 88% of known species), to reconstruct global diversity patterns at five and ten km resolutions. However, when we mapped out diversity using Maxent based on these indices, Simpson's index generally over‐predicted diversity, whereas Hill numbers were more conservative. Based on an average of the better projected indices, one can map out diversity across resolutions and overcome biases accurately predicting diversity patterns even for data‐poor areas, but if a single metric is used, Hill numbers are most robust to bias. Going forward, this workflow will enable standardized best practices for diversity mapping based on a clear understanding of the performance of different metrics. [ABSTRACT FROM AUTHOR]
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- 2024
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46. How Two Megatrends Affect Each Other: Studying the Interplay of Remote Work and Workplace Inclusion with a Random Intercept Cross-Lagged Panel Model.
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Schertler, Magdalena, Glumann, Nicola V., and Boehm, Stephan A.
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TELECOMMUTING ,LABOR supply ,DIVERSITY in the workplace ,GENDER ,HETEROGENEITY - Abstract
Two megatrends characterize the modern working world. First, remote work has become the "new normal" for many employees. Second, the increasing heterogeneity of the workforce has made a case for inclusion—that is, belongingness and the opportunity for authenticity—that employees must perceive to reap the benefits of diversity. However, it is unclear whether the relationship between remote work and inclusion is positive or negative, and whether these two factors cause a unidirectional or reciprocal impact on each other. Furthermore, it is unresolved whether diversity dimensions, such as gender, have a moderating impact on the relationship. To address these questions, we collect a large-scale longitudinal dataset (n = 2,380) and use an advanced methodology (random intercept cross-lagged panel model) to separate the between-person from the within-person variances, thereby allowing for causal conclusions from the within-person effect. Our results show opposing effects at the between-person and within-person levels: although the employees who worked remotely more experienced more opportunity for authenticity and belongingness in general (between-person variance), an increase in remote work led to lower belongingness and authenticity within a single employee (within-person variance). A gender effect was observed for the opportunity for authenticity, with only negative within-person effects being shown for women. [ABSTRACT FROM AUTHOR]
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- 2024
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47. Phyto-sociological changes in the Goima Forest, Gujarat due to human disturbances and their implications for conservation.
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Malek, S. S., Patel, M. H., Rathod, K. R., Jha, S. K., Desai, B. S., and Tandel, M. B.
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- 2024
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48. Diversity, Abundance, and Foraging Behaviour of Insect Pollinators in Litchi (Litchi chinensis Sonn.) under Hot and Subhumid Conditions.
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Kumari, Pooja, Choudhary, Jaipal Singh, Dey, Debjani, Dhakar, Mahesh Kumar, and Mahdavi, Vahid
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INSECT pollinators ,POLLINATORS ,POLLINATION by insects ,HONEYBEES ,LITCHI ,POLLINATION by bees - Abstract
Insect pollinators and flowering plants have a long‐standing, coevolutionary, mutualistic relationship. One such example is the litchi tree (Litchi chinensis Sonn.), a fruit crop that relies on insect pollination. Litchi flowers are hermaphroditic, but they cannot self‐pollinate due to self‐sterility, unlike self‐pollinating plants. Therefore, insect pollinators are crucial to successful fruit development. To understand the pollinator's foraging behaviour and diversity associated with litchi under hot and subhumid conditions, the present study was conducted on the Shahi variety of litchi at the ICAR‐Research Complex for Eastern Region, Farming System Research Centre for Hill and Plateau, Ranchi (Jharkhand), India. During the flowering period, a total of 19 species of insect pollinators from the orders Hymenoptera, Diptera, Lepidoptera, and Coleoptera were observed visiting litchi inflorescences. Apis mellifera and Apis dorsata were the most dominant pollinator species. Each species displayed distinct characteristics in terms of abundance and diversity. Varied foraging speeds (stay times) were also noted, with A. dorsata (6.94 s) being the fastest and Musca domestica (2.88 s) being the slowest. Pollinator activity was highest in the eastern direction, between 8:00 a.m. and 10:00 a.m. Apis florea had the highest foraging rate (visitation rate) (14.02 flowers visited per minute), followed by Apis mellifera, while Episyrphus taeniops had the lowest. Apis species were identified as the most abundant and frequent visitors in litchi orchards. [ABSTRACT FROM AUTHOR]
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- 2024
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49. Why and when does multitasking impair flow and subjective performance? A daily diary study on the role of task appraisals and work engagement.
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Pluut, Helen, Darouei, Maral, and Zeijen, Marijn Eveline Lidewij
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EMPLOYEE reviews ,JOB performance ,JOB involvement ,PSYCHOLOGICAL stress ,STRESS management - Abstract
In this diary study, we contribute to research on day-level multitasking in organizations by investigating why and when multitasking impairs employees' work-related flow and subjective job performance on a daily basis. Drawing on Lazarus and Folkman's transactional model of stress and coping, we propose that employees' appraisal of their daily tasks (i.e., less challenging and more hindering) may explain why multitasking has negative implications for flow and job performance. Moreover, we expect that daily work engagement can buffer the detrimental effects of multitasking on flow and job performance. A total of 33 professional workers in the food industry participated in our study and were asked to respond to 10 daily surveys at work across 4 weeks. In line with our expectations, results showed that on days when employees' working time was highly fragmented across a high number of tasks, they experienced less flow and, in turn, their job performance was lower on that particular day. Moreover, appraisal of daily tasks as less challenging - though not more hindering - explained why multitasking impairs flow. Finally, daily work engagement buffered the detrimental impact of multitasking on flow. The results presented in this paper offer novel and ecologically valid insights into why and when multitasking may backfire for employees. [ABSTRACT FROM AUTHOR]
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- 2024
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- View/download PDF
50. Convergent direct and indirect cortical streams shape avoidance decisions in mice via the midline thalamus.
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Ma, Jun, O'Malley, John J., Kreiker, Malaz, Leng, Yan, Khan, Isbah, Kindel, Morgan, and Penzo, Mario A.
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THALAMUS ,UNCERTAIN systems ,MICE ,THALAMIC nuclei ,SIGNALS & signaling - Abstract
Current concepts of corticothalamic organization in the mammalian brain are mainly based on sensory systems, with less focus on circuits for higher-order cognitive functions. In sensory systems, first-order thalamic relays are driven by subcortical inputs and modulated by cortical feedback, while higher-order relays receive strong excitatory cortical inputs. The applicability of these principles beyond sensory systems is uncertain. We investigated mouse prefronto-thalamic projections to the midline thalamus, revealing distinct top-down control. Unlike sensory systems, this pathway relies on indirect modulation via the thalamic reticular nucleus (TRN). Specifically, the prelimbic area, which influences emotional and motivated behaviors, impacts instrumental avoidance responses through direct and indirect projections to the paraventricular thalamus. Both pathways promote defensive states, but the indirect pathway via the TRN is essential for organizing avoidance decisions through disinhibition. Our findings highlight intra-thalamic circuit dynamics that integrate cortical cognitive signals and their role in shaping complex behaviors. How prefronto-thalamic circuits shape emotional and motivated behaviors are not fully understood. Here authors report a top-down modulation in mouse prefronto-thalamic projections. The prelimbic area influences avoidance via direct and indirect pathways, revealing distinctive intrathalamic dynamics essential for complex behavior integration. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
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