Results 1 to 10 of about 618 (118)
Environmental racism and air pollution: Pre and post the COVID‐19 economic shutdown
Review of Policy Research, EarlyView., 2023 Abstract Decades of research demonstrates that minoritized groups are disproportionately affected by swathes of harmful pollutants, including air pollution, even controlling for low income. Would significantly reducing individual car traffic help reduce the EJ gap?
Heather E. Campbell +3 more
wiley +1 more source
野生动物学报, 2021 为了掌握内蒙古贺兰山国家级自然保护区内马鹿（Cervus elaphus）的种群数量和种群结构，维护内蒙古贺兰山的生态平衡。于2017年11—12月，2018年4—6月、11—12月，2019年4—6月，在内蒙古贺兰山国家级自然保护区内，利用样线法对保护区内的马鹿进行调查，采用Distance R进行数据分析，估测种群数量和种群密度，并对种群结构进行探讨。研究发现，马鹿在2018年冬季种群数量最高约为2452（1678—3578）只，种群密度为3705（2539—5048）只/km2，遇见率为1 ...
孙萍黄师梅苏云孟德怀张致荣滕丽微刘振生
doaj
Zhejiang Daxue xuebao. Lixue ban, 2005 园林鸟类是城市环境质量的重要指标，也是城市自然保护和生态建设的重要组成部分.1997年10月至1998年12月，通过选取杭州市区20个主要园林，根据季节每月一至两次调查园林鸟类的物种和数量，对杭州市园林鸟类的群落结构及其季节变化进行了分析探讨，结果显示：全部园林中共记录到鸟类82种，其中迁徙鸟类50种，占61%，留鸟32种，占39% ；园林鸟类群落呈现出较强的季节性，从全部园林总体上看，物种数和总数量呈现春秋两个高峰，夏季最低；从单个园林来看，多数园林鸟类群落物种数的最高峰集中在冬季 ...
WANGYu-jun(王玉军) +2 more
doaj +1 more source
野生动物学报, 2023 调查物种种群数量及适宜生境分布是合理保护野生动物和制定管理对策的基础。为了解鹅喉羚（Gazella subgutturosa）在哈密市的种群数量与适宜生境，2022年 7—9月，采用样线法对哈密市鹅喉羚种群数量和地理分布开展调查，采用Distance软件和MaxEnt模型对鹅喉羚的种群数量及适宜生境进行计算。结果表明：调查中发现鹅喉羚303群，共1 029只。鹅喉羚适宜生境主要位于天山南侧的荒漠地区，面积为1.725 9万 km2，占哈密市面积的12.15%，估算哈密市的种群密度为（2.013±0.
董培培 +7 more
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野生动物学报, 2021 2016年11月—2019年3月，采用“点样带法”对云南异龙湖冬季水鸟群落进行研究，共记录冬季水鸟8目14科59种，其中，2016—2017年调查到6目10科41种；2017—2018年调查到8目14科56种；2018—2019年调查到8目14科59种。从水鸟群落组成的年度动态图上看，物种数呈增加趋势，最多出现在2018—2019年，记录59种；从水鸟物种数量的年度动态图上看，物种数呈先增加后减少趋势，最多出现在2017—2018年。冬季水鸟物种数及个体数呈逐年增加，2016 ...
马国强 1 +1 more
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Opportunities, research gaps, and risks in allogenic ecosystem engineer mimicry
Conservation Biology, EarlyView.Abstract In an age of anthropogenically driven species loss and increasingly novel ecosystems, ecosystem engineer restoration is a process‐based approach to supporting ecosystem function. Many ecosystem engineers have low or declining population sizes.
Brandi Goss +2 more
wiley +1 more source
Exploring gaps, biases, and research priorities in the evidence for reptile conservation actions
Conservation Biology, EarlyView.Abstract With over 21% of reptile species threatened with extinction, there is an urgent need to ensure conservation actions to protect and restore populations are informed by relevant, reliable evidence. We examined the geographic and taxonomic distribution of 707 studies that tested the effects of actions to conserve reptiles synthesized in ...
Oliver Speight +9 more
wiley +1 more source
Assessing limits of sustainable seed harvest in wild plant populations
Conservation Biology, EarlyView.Abstract Seed harvesting from wild plant populations is key for ecological restoration, but it may threaten the persistence of the source populations. Consequently, several countries have set guidelines limiting the proportions of harvestable seeds. However, these guidelines are inconsistent and lack a solid empirical basis.
Anna Bucharova +3 more
wiley +1 more source
A global indicator of species recovery
Conservation Biology, EarlyView.Abstract Monitoring progress toward meeting global biodiversity goals involves several indicators, including, at the species level, the International Union for Conservation of Nature (IUCN) Red List Index (RLI) and the Living Planet Index (LPI). However, at present, there is no indicator specifically for tracking species recovery, despite this being ...
H. Resit Akçakaya +4 more
wiley +1 more source
Finding floral and faunal species richness optima among active fire regimes
Conservation Biology, EarlyView.Abstract Changing fire regimes have important implications for biodiversity and challenge traditional conservation approaches that rely on historical conditions as proxies for ecological integrity. This historical‐centric approach becomes increasingly tenuous under climate change, necessitating direct tests of environmental impacts on biodiversity.
Zachary L. Steel +8 more
wiley +1 more source