Results 101 to 110 of about 317,448 (190)
Evaluating the use of taxonomy in the IUCN Red List
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Taxonomy defines the units that conservationists strive to preserve for future generations. However, the discovery of new species and the taxonomic revision of existing species affect conservation efforts. Despite the importance of taxonomy for a species’ conservation, there is currently no overview of how those leading species extinction risk
Stephen T. Garnett +8 more
wiley +1 more source
野生动物学报, 2009 通过问卷调查和样地调查方法,分析极端天气气候对宁夏野生动物种群安全产生的影响。极端天气气候对优势物种数量影响严重。雀形目种群安全主要受到沙尘暴、冰雹和暴雨的影响较大;迁徙鸟类种群安全主要受到沙尘暴、冰雹和暴雨的影响较大;啮齿类种群安全主要受到暴雨的影响较大;岩羊种群安全受到沙尘暴、冰雹、暴雨和降雪的影响。
刘晓红
doaj
海南重楼(Paris dunniana Lévl.)种群的生存状况
, 2004 对海南岛尖峰岭林区海南重楼(ParisdunnianaL啨vl.)种群的生存状况进行了调查,并分析了其生存环境条件及种群结构特征与发展趋势。结果表明:在尖峰岭林区,只有35%的被调查沟谷生境存有海南重楼个体,大多数生境个体不足3株,平均种群密度仅为3.2株·km-2,小群聚株间距大(3～30m),种群联系程度低,呈孤立的分散状态。81%的调查个体株高低于100cm,而低于80cm的个体占75%以上;87.5%的个体未开花;平均根茎长10.5cm,变幅在4～20cm之间。植株小叶片数为3～9,只有34.3%
王丽, 包维楷
core
Habitat and spatial trends of U.K. wintering waterbird populations over 50 years
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract The United Kingdom is an important wintering ground for millions of waterbirds. Most U.K. wintering waterbird populations increased between 1970 and the mid‐1990s, but declined thereafter. We examined U.K. population indices in 46 wintering waterbird species in two 25‐year periods, 1970–1994 and 1995–2019, to identify which waterbird groups ...
Blaise Martay +8 more
wiley +1 more source
野生动物学报, 2015 对中国白头鹤圈养种群的统计学和遗传学结果进行了相关分析,并对种群数量、年龄结构、性比情况、基因多样性、近交系数以及未来100 a种群的发展趋势进行了重点研究。结果表明:截止到2013年12月31日,中国圈养白头鹤种群共有存活个体76只,分别饲养于15家单位,其中建立者的数量为16只,潜在建立者的数量为41只。圈养白头鹤种群中育龄个体充足,但幼龄个体数量不足,种群年龄结构不是很合理。白头鹤种群保留了野生个体92.9%的基因多样性,平均近亲系数为0,是一个没有任何近亲繁殖的优质种群。通过分析发现 ...
何相宝 田秀华 李晓敏 周军英 尹惠媛
doaj
, 2010 通过样地调查和数据统计,以种群生命表和生存分析理论为基础,编制了胡杨种群的静态生命表,绘制了存活曲线、生存率曲线、累计死亡率曲线、种群死亡密度曲线和危险率曲线,分析了种群数量特征。同时,结合种群动态量化方法及时间序列预测,分析了种群数量的动态变化。结果表明:塔里木河下游河岸胡杨种群幼龄级和老龄级所占比例较小,存活曲线接近偏正态分布,表现为衰退型种群;胡杨种群的死亡密度曲线和危险率曲线变化趋势基本一致,都在30年后出现峰值;动态指数小于0,说明下游胡杨种群幼苗资源匮乏,结构不合理 ...
阎海龙 +4 more
core
Scientists’ warning on the global destruction of rock outcrop ecosystems
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Rock outcrops are geological formations that harbor a highly specialized biota adapted to harsh environmental conditions that differ from their surrounding landscapes. They are globally distributed, especially in old, highly weathered landscapes, and can function as habitat islands containing high levels of endemism and distinct evolutionary ...
Luiza F. A. de Paula +19 more
wiley +1 more source
基于种群生存力分析的陕西铜川朱鹮再引入种群的可持续性及保护对策
野生动物学报种群生存力分析（population viability analysis，PVA）虽然已经在濒危物种的保护管理中得到广泛应用，但目前面临的严峻挑战是如何采用PVA分析影响濒危物种种群长期维持的内外因子。经过数十年的保护，朱鹮（Nipponia nippon）野生种群的数量已经从7只增长到约4 400只，若干再引入计划也分别在中国、日本和韩国相继实施。过去的研究表明，种群统计随机性、灾害和种群性比等因素是影响朱鹮野生种群稳定增长的主要因素，然而，对影响朱鹮再引入种群长期稳定维持的因素却知之甚少 ...
王华强 +3 more
doaj
, 2009 在20℃、25℃下,将大型溞和老年低额溞分别按7+3(B组),5+5(C组),3+7(D组)的组合进行混合培养,以及用单种培养(10+0(A组),0+10(E组))作为对照,研究了温度和种间竞争对大型溞种群动态和两性生殖的影响笛榻峁砻?在混合培养时,大型溞对老年低额溞产生明显的竞争优势。20℃、25℃下,单种培养的老年低额溞最大种群密度分别为大型溞的2.31和1.97,而在混合培养下老年低额溞的种群密度明显低于大型溞,在实验25d后几乎全部死亡。25℃下两种溞的种群密度之间存在极显著的负相关性 ...
邓道贵 +5 more
core
Behavioral interventions to reduce demand for threatened freshwater turtles as pets
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Growing demand for freshwater turtles as pets has fueled illegal trade and accelerated wild population declines, underscoring the need for theory‐based demand‐reduction interventions. We conducted a three‐part randomized controlled trial with active turtle keepers (n = 1800) in China to test conservation‐ and legality‐framed messages by ...
Wuji Zheng +9 more
wiley +1 more source