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1. An analysis of threats to endangered animal taxa in California's freshwater systems

   https://doi.org/10.1002/aqc.4057  

   Qin, Gary ; Anderson, Kurt_E ; Cassady, Anna ; Rodriguez, Leonardo ; Syed, Eeman ; Regan, Helen_M ( December 2023 , Aquatic Conservation: Marine and Freshwater Ecosystems)

   This study analysed threats to federally and State‐listed endangered and threatened animal taxa in California, United States, and how threats varied by taxa, habitat use, spatial extent, severity, geographical region and endemic status using threat categories from the International Union for Conservation of Nature (IUCN) Red List Threats Classification Scheme and information from scientific literature and reports.

   A majority of the taxa evaluated were associated with freshwater habitats and were endemic to California. The most threatened taxonomic groups were fish, followed by mammals and birds. The number of threats was mostly evenly distributed across the State's three geographical regions (i.e., North, Central and South), and no single region had a disproportionately high number of endangered animal taxa.

   Freshwater taxa were the most affected in nearly every threat category, suggesting that freshwater taxa are more threatened than their terrestrial and marine counterparts. In descending order, the most prominent threats across all taxa were habitat loss, invasive species, climate change and altered hydrology. Threats identified as high severity also tended to have a high spatial extent and vice versa.

   This study shows that the numerous freshwater faunas in California are disproportionately affected by threats also found in other freshwater systems and Mediterranean‐climate regions, highlighting the scope of the freshwater biodiversity crisis in California. Managing priorities to target the most pervasive threats to endangered freshwater taxa documented in this study will help safeguard freshwater biodiversity against human threats in California and beyond.

    

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2. The role of sand lances ( Ammodytes sp.) in the Northwest Atlantic Ecosystem: A synthesis of current knowledge with implications for conservation and management

   https://doi.org/10.1111/faf.12445  

   Staudinger, Michelle D. ; Goyert, Holly ; Suca, Justin J. ; Coleman, Kaycee ; Welch, Linda ; Llopiz, Joel K. ; Wiley, David ; Altman, Irit ; Applegate, Andew ; Auster, Peter ; et al ( March 2020 , Fish and Fisheries)

   The American sand lance (Ammodytes americanus, Ammodytidae) and the Northern sand lance (A. dubius, Ammodytidae) are small forage fishes that play an important functional role in the Northwest Atlantic Ocean (NWA). The NWA is a highly dynamic ecosystem currently facing increased risks from climate change, fishing and energy development. We need a better understanding of the biology, population dynamics and ecosystem role ofAmmodytesto inform relevant management, climate adaptation and conservation efforts. To meet this need, we synthesized available data on the (a) life history, behaviour and distribution; (b) trophic ecology; (c) threats and vulnerabilities; and (d) ecosystem services role ofAmmodytesin the NWA. Overall, 72 regional predators including 45 species of fishes, two squids, 16 seabirds and nine marine mammals were found to consumeAmmodytes. Priority research needs identified during this effort include basic information on the patterns and drivers in abundance and distribution ofAmmodytes, improved assessments of reproductive biology schedules and investigations of regional sensitivity and resilience to climate change, fishing and habitat disturbance. Food web studies are also needed to evaluate trophic linkages and to assess the consequences of inconsistent zooplankton prey and predator fields on energy flow within the NWA ecosystem. Synthesis results represent the first comprehensive assessment ofAmmodytesin the NWA and are intended to inform new research and support regional ecosystem‐based management approaches.

    

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3. Biogeographic survey of soil bacterial communities across Antarctica

   https://doi.org/10.1186/s40168-023-01719-3  

   Varliero, Gilda ; Lebre, Pedro H. ; Adams, Byron ; Chown, Steven L. ; Convey, Peter ; Dennis, Paul G. ; Fan, Dandan ; Ferrari, Belinda ; Frey, Beat ; Hogg, Ian D. ; et al ( December 2024 , Microbiome)

   Antarctica and its unique biodiversity are increasingly at risk from the effects of global climate change and other human influences. A significant recent element underpinning strategies for Antarctic conservation has been the development of a system of Antarctic Conservation Biogeographic Regions (ACBRs). The datasets supporting this classification are, however, dominated by eukaryotic taxa, with contributions from the bacterial domain restricted to Actinomycetota and Cyanobacteriota. Nevertheless, the ice-free areas of the Antarctic continent and the sub-Antarctic islands are dominated in terms of diversity by bacteria. Our study aims to generate a comprehensive phylogenetic dataset of Antarctic bacteria with wide geographical coverage on the continent and sub-Antarctic islands, to investigate whether bacterial diversity and distribution is reflected in the current ACBRs.

   Soil bacterial diversity and community composition did not fully conform with the ACBR classification. Although 19% of the variability was explained by this classification, the largest differences in bacterial community composition were between the broader continental and maritime Antarctic regions, where a degree of structural overlapping within continental and maritime bacterial communities was apparent, not fully reflecting the division into separate ACBRs. Strong divergence in soil bacterial community composition was also apparent between the Antarctic/sub-Antarctic islands and the Antarctic mainland. Bacterial communities were partially shaped by bioclimatic conditions, with 28% of dominant genera showing habitat preferences connected to at least one of the bioclimatic variables included in our analyses. These genera were also reported as indicator taxa for the ACBRs.

   Overall, our data indicate that the current ACBR subdivision of the Antarctic continent does not fully reflect bacterial distribution and diversity in Antarctica. We observed considerable overlap in the structure of soil bacterial communities within the maritime Antarctic region and within the continental Antarctic region. Our results also suggest that bacterial communities might be impacted by regional climatic and other environmental changes. The dataset developed in this study provides a comprehensive baseline that will provide a valuable tool for biodiversity conservation efforts on the continent. Further studies are clearly required, and we emphasize the need for more extensive campaigns to systematically sample and characterize Antarctic and sub-Antarctic soil microbial communities.

    

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4. Global progress in incorporating climate adaptation into land protection for biodiversity since Aichi targets

   https://doi.org/10.1111/gcb.15511  

   Carrasco, Luis ; Papeş, Monica ; Sheldon, Kimberly S. ; Giam, Xingli ( February 2021 , Global Change Biology)

   Climate adaptation strategies are being developed and implemented to protect biodiversity from the impacts of climate change. A well‐established strategy involves the identification and addition of new areas for conservation, and most countries agreed in 2010 to expand the global protected area (PA) network to 17% by 2020 (Aichi Biodiversity Target 11). Although great efforts to expand the global PA network have been made, the potential of newly established PAs to conserve biodiversity under future climate change remains unclear at the global scale. Here, we conducted the first global‐extent, country‐level assessment of the contribution of PA network expansion toward three key land prioritization approaches for biodiversity persistence under climate change: protecting climate refugia, protecting abiotic diversity, and increasing connectivity. These approaches avoid uncertainties of biodiversity predictions under climate change as well as the issue of undescribed species. We found that 51% of the countries created new PAs in locations with lower mean climate velocity (representing better climate refugia) and 58% added PAs in areas with higher mean abiotic diversity compared to the available, non‐human‐dominated lands not chosen for protection. However, connectivity among PAs declined in 53% of the countries, indicating that many new PAs were located far from existing PAs. Lastly, we identified potential improvements for climate adaptation, showing that 94% of the countries have the opportunity to improve in executing one or more approaches to conserve biodiversity. Most countries (60%) were associated with multiple opportunities, highlighting the need for integrative strategies that target multiple land protection approaches. Our results demonstrate that a global improvement in the protection of climate refugia, abiotic diversity, and connectivity of reserves is needed to complement land protection informed by existing and projected species distributions. Our study also provides a framework for countries to prioritize land protection for climate adaptation using publicly available data.

    

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5. Private Woodland Owner Perceptions of Threat and Efficacy Shape Management Responses for Climate Change Adaptation

   https://doi.org/10.1093/jofore/fvae017  

   Breigenzer, Peter ; Leahy, Jessica ; Rogers, Nicole_Suzanne ; Wason, Jay_W ( June 2024 , Journal of Forestry)

   Private woodland owners (PWOs) face an increasing number of considerations for climate change adaptation and mitigation activities in their forest management. Evidence suggests there may be a disconnect between PWOs’ climate change perceptions and behaviors, which can limit implementation. We conducted seventeen semistructured interviews in Maine to develop a typological framework of PWOs based on their perceptions of climate-induced threats and efficacy. Our results produced three types of PWOs: the steady-as-they-go landowner (low perceived threat), the science-driven landowner (high perceived threat; high efficacy), and the seeking-support landowner (high perceived threat; low efficacy). Although all three types of PWOs regularly implemented resistance and resilience practices, their attitudes toward transition practices (i.e., assisted migration) diverged based on their perceptions of threat and efficacy. This typological framework can be used when targeting communications to PWOs regarding the overlap between climate adaptive management and traditional best management practices.

   Study Implications: PWOs in our study recognized climate-related impacts while implementing diverse forest management practices to meet both climate-related and non-climate-related objectives. The divergent attitudes toward transition practices exhibited by our three PWO types highlight the notion that adaptive practices can be both intentional and incidental. Our findings suggest that outreach efforts should understand PWO perceptions of climate change threats and their feelings of efficacy in responding to such threats. When combined with knowledge about the overlap between traditional best management practices and new climate-adaptive strategies, extension and outreach efforts can tailor their messaging to fit the appropriate audience.

    

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