Search

Simple Summary: Understanding the ecological processes involved in establishing a metacommunity, a collection of small communities linked by species dispersal, could help with biodiversity conservation. In this work, we examine how local community connectivity affects the distributional patterns of various bird species across metacommunities in the strikingly different Altai landscapes. We discovered that connectivity was most important for determining community composition in metacommunities. High beta diversity and a high turnover component in the research region showed that regional-scale conservation efforts should consider overall biodiversity. Although they are not part of the Altai-Sayan biodiversity ecoregion, the riparian and desert landscapes are essential to the birds that reside in the mountain ranges and should be regarded as integral parts of the ecoregion, and high connectivity stepping-stone habitats in these landscapes should be protected. Located on the southwest slope and plain areas of the Altai Mountains in China, this study aims to explore bird composition variation (beta diversity) in mountain landscape (metacommunity M), riparian landscape (metacommunity R), desert landscape (metacommunity D) and across the three landscapes (metacommunity A), and to assess how patch connectivity with environmental and spatial factors influence species distributional patterns across multiple metacommunities. In 78 transect lines over the study area, 9724 detections of 139 bird species were detected. We calculated the beta diversity, its turnover and nestedness components in four metacommunities. We used the variation partitioning method to investigate the relative importance between the environment, spatial variation and locality connectivity in driving bird community composition variation. We found high beta diversities with a small contribution of nestedness components in all four metacommunities. When only a single set of predictors is contained in the model, the predictor that best explains the variation of bird community composition is connectivity in metacommunity M, R and D and spatial predictor in metacommunity A. In all three sets of predictors, 73.8~85.4% of variations of community composition can be explained in the four metacommunities, and connectivity always contributed the most. High beta diversity and a high turnover component imply that regional-scale conservation efforts should be thought of as preserving overall biodiversity. A conservation strategy is to keep stepping-stone habitats with good connectivity in the middle of the riparian landscape. Along with the Altai-Sayan biodiversity ecoregion, the desert and riparian environments are essential for birds residing in the mountainous terrain. Furthermore, they should be regarded as integral parts of the ecoregion. [ABSTRACT FROM AUTHOR]

Extreme weather events are likely to increase in the coming decades which may have severe consequences on biodiversity. As conservation funding is limited, identifying priority areas for conservation of species prone to climatic impacts may improve the benefit of conservation investments. As part of its Biodiversity Action Plan, China is carrying out an initiative to evaluate new threats from climatic impacts by 2030 in Priority Areas for Biodiversity Conservation (PABCs). Focusing on floods, which are exhibiting an increasing trend in recent decades in the country, we generated information for such an initiative. We investigated contemporary flood exposure and species internal refugia for all amphibians, birds, and mammals within the 32 terrestrial PABCs of China. Amphibians comprised the greatest number of species at significant flood exposure followed by mammals and birds (~ 90%, ~ 81%, ~ 52% of the total species richness in the country, respectively). However, availability of flood-free internal refugia > 10% and ≤ 25% was found for ~ 15% mammals, ~ 29% birds and ~ 1% amphibians. Large areas within PABCs are highly exposed to floods. Species in these areas possessing traits that contribute sensitivity and low adaptability to flood disturbance are the ones expected to face negative delayed effects from past exposure, or to possess less resilience to future impacts, including human activities. In the face of multiple threats we call for implementation of cost-effective strategies that strengthen ongoing conservation actions in flood-prone areas and refugia (e.g., landscape connectivity, habitat restoration, afforestation) to better assist in the allocation of limited resources for protecting vulnerable species. [ABSTRACT FROM AUTHOR]

Background:Habitat fragmentation, associated with human population expansion, impedes dispersal, reduces gene flow and aggravates inbreeding in species on the brink of extinction. Both scientific and conservation communities increasingly realize that maintaining and restoring landscape connectivity is of vital importance in biodiversity conservation. Prior to any conservation initiatives, it is helpful to present conservation practitioners with a spatially explicit model of functional connectivity for the target species or landscape. Methodology/Principal Findings:Using Przewalski’s gazelle (Procapra przewalskii) as a model of endangered ungulate species in highly fragmented landscape, we present a model providing spatially explicit information to inform the long-term preservation of well-connected metapopulations. We employed a Geographic Information System (GIS) and expert-literature method to create a habitat suitability map, to identify potential habitats and to delineate a functional connectivity network (least-cost movement corridors and paths) for the gazelle. Results indicated that there were limited suitable habitats for the gazelle, mainly found to the north and northwest of the Qinghai Lake where four of five potential habitat patches were identified. Fifteen pairs of least-cost corridors and paths were mapped connecting eleven extant populations and two neighboring potential patches. The least-cost paths ranged from 0.2 km to 26.8 km in length (averaging 12.4 km) and were all longer than corresponding Euclidean distances. Conclusions/Significance:The model outputs were validated and supported by the latest findings in landscape genetics of the species, and may provide impetus for connectivity conservation programs. Dispersal barriers were examined and appropriate mitigation strategies were suggested. This study provides conservation practitioners with thorough and visualized information to reserve the landscape connectivity for Przewalski’s gazelle. In a general sense, we proposed a heuristic framework for species with similar biological and ecological characteristics. [ABSTRACT FROM AUTHOR]

The past 40 years witnessed a boom of protected areas (PAs) in China. To date, China has established 11 types of PAs, whose conservation objectives vary from protecting biodiversity and geological features, preserving scenic landscapes and seascapes, to restoring and maintaining ecosystem services. Covering over 17% of the land and 3.5% of the marine territory of China, the PAs have had beneficial effects on conservation in this country. However, the success of these PAs is largely restricted by ecological gaps in PA structure, defects of the management system, and is also negatively influenced by local development and urbanization driven by a growing economy. To improve the conservation efficiency of China's PAs, we suggest structural adjustment based on integrative research, practical strategies to alleviate administrative conflicts, increased engagement of local communities, transparent allocation of conservation funding, strengthened supervision and penalty mechanisms for destructive activities, and improved large-scale designation to coordinate demands of conservation and socioeconomic development. [ABSTRACT FROM AUTHOR]

We present the results of our eighth annual horizon scan of emerging issues likely to affect global biological diversity, the environment, and conservation efforts in the future. The potential effects of these novel issues might not yet be fully recognized or understood by the global conservation community, and the issues can be regarded as both opportunities and risks. A diverse international team with collective expertise in horizon scanning, science communication, and conservation research, practice, and policy reviewed 100 potential issues and identified 15 that qualified as emerging, with potential substantial global effects. These issues include new developments in energy storage and fuel production, sand extraction, potential solutions to combat coral bleaching and invasive marine species, and blockchain technology. [ABSTRACT FROM AUTHOR]