Results 31 to 40 of about 13,778 (155)
Habitat and spatial trends of U.K. wintering waterbird populations over 50 years
Conservation Biology, EarlyView.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
Scientists’ warning on the global destruction of rock outcrop ecosystems
Conservation Biology, EarlyView.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
四川大学学报. 自然科学版, 2008 为了阐明杜松(Juniperus rigida)种群的年龄结构和未来发展趋势,合理保护现有资源,编制了该种群的静态生命表,绘制了存活曲线和死亡率曲线,以及4种生存函数曲线.结果表明:杜松种群数量少,幼苗更新不良,属于衰退型种群.杜松种群的存活曲线属于左偏正态型,该种群的死亡率与消失率变化趋势基本一致.龄级Ⅰ与Ⅱ的值为负,在Ⅵ龄级达到最大.导致种群衰退的原因有种子萌发和幼苗生长困难和比较严重的人为干扰.应当提高种子的萌发率,人工培育幼苗,形成不同龄级的种群更新体系,减少人为干扰,以达到保护杜松的目的 ...
褚胜利, 李登武, 李景侠
doaj
野生动物学报, 2022 为有效保护浙江长兴尹家边扬子鳄保护区扬子鳄(Alligator sinensis)种群,丰富野放扬子鳄的遗传多样性,利用13个微卫星标记分析了该种群的遗传多样性,比较核心区和野放区种群的遗传多样性差异。结果显示:保护区扬子鳄种群共检测到31个等位基因,其中含2个稀有等位基因。野放区种群的平均有效等位基因数量(1.82)、平均观测杂合度(0.49)、平均期望杂合度(0.43)、平均多态信息含量(0.34)和平均香农信息指数(0.64)均低于核心区(1.89、0.52、0.46、0.37和0.70 ...
方黎明 +8 more
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Institutional lessons from the Nordic management model
Conservation Biology, EarlyView.Abstract To improve wildlife management outcomes, in terms of reaching management goals and increasing legitimacy, Nordic countries have developed institutional systems involving stakeholders that aim for a more inclusive and participatory model.
Jens Nilsson +2 more
wiley +1 more source
野生动物学报, 2015 物种谱系是种群管理的必要前提,大猩猩被列为IUCN极危物种。中国动物园大猩猩圈养种群始于1973年,截至2013年12月31日,共有8只存活个体。为了更好地科学管理中国动物园大猩猩圈养种群,对收集到的大猩猩中国区谱系及其扩展谱系进行了统计学与遗传学分析。结果表明,种群平均增长率λ=0.968,呈下降趋势。种群奠基者共14只,潜在奠基者1只。种群保留了野生个体87.24%的基因多样性,无近亲繁殖情况。根据现状分析结果,中国动物园大猩猩圈养种群是一个极小的种群,该种群的发展壮大有待于加强国内自身繁殖 ...
廖 辉 袁 梨 殷毓中 张邓华 姚 勇 钟 灵 周 俊
doaj
Zhejiang Daxue xuebao. Lixue ban, 2003 以窝卵数、卵大小(长径和短径)、卵重量和窝卵重为指标,对7个北草蜥地理种群的繁殖特征进行聚类分析.结果表明:不同地理分布的北草蜥种群的繁殖特征可明显分为福建宁德、浙江洞头岛和浙江丽水类群,浙江北麂岛、安徽滁洲、浙江东阳和浙江杭州类群.其中,浙江北麂岛种群与安徽滁洲种群的繁殖特征尤为相似.
DUWei-guo(杜卫国) +2 more
doaj +1 more source
Effects of restoration practices on biodiversity in temperate and boreal forests
Conservation Biology, EarlyView.Abstract Several restoration practices are used to mitigate and compensate for the negative effects of large‐scale forestry on biodiversity in temperate and boreal forests. A comprehensive synthesis of the benefits of these practices across taxa is missing. We conducted a systematic review and meta‐analysis on this topic.
Malin Tälle +2 more
wiley +1 more source
野生动物学报, 2018 根据上海动物园斑嘴环企鹅(Spheniscus demersus)种群的谱系及相关数据,编制生命表,基于VERTEX10.2.5对该种群未来100年的动态进行模拟,进而为种群发展提出管理建议。结果显示在理想条件下,无近交、无灾害、无密度制约,种群呈持续增长状态,灭绝概率为0,种群数量将达到138只。而在实际情况下进行模拟,则不容乐观。种群衰退,100年后灭绝概率为95.8%,因此针对该种群现状有针对性地提出保护管理措施刻不容缓。
刘芳远 黄康宁 刘群秀 田秀华
doaj
Behavioral interventions to reduce demand for threatened freshwater turtles as pets
Conservation Biology, EarlyView.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