Results 41 to 50 of about 13,778 (155)
野生动物学报, 2018 筛选了10个微卫星位点对长白山北部地区的7个西伯利亚狍的局域种群进行遗传多样性和遗传结构分析。研究结果表明,7个西伯利亚种群遗传多样性水平均较高。等位基因数在7.3～11.1之间,平均等位基因数为8.95。等位基因丰富度整体水平较高,为7.5。观测杂合度和期望杂合度变化范围在0.7～0.76之间,种群遗传一致性较低,种群遗传多样性丰富、变异程度较高。7个种群中,仅黄泥河种群的Fis值为负值(-0.01),其余6个种群的Fis值均大于0,在0.021～0.061之间,表明种群内部可能存在一定程度的近交 ...
盛清宇 孙铁铎 张崇颖 罗理杨 姜广顺
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Conservation Biology, EarlyView.Abstract Site fidelity is the tendency for animals to repeatedly return to the same locations, either within or between years. Site fidelity enables animals to utilize knowledge of previously visited locations, including assessments of seasonal variations in health and mortality risks (e.g., predation), resource availability, and social benefits such ...
Tobias A. Ross +13 more
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四川大学学报. 自然科学版, 2010 在九寨沟国家级自然保护区6类森林群落中设置样方对华西箭竹(Fargesia nitida)种群进行了取样,对2002年和2007年同一群落中华西箭竹的种群密度、平均高度和平均生物量的差异进行了统计检验.发现5年中,青杄林群落中箭竹平均高度增加,巴山冷杉林群落中箭竹平均生物量增加,白桦林群落中箭竹种群密度下降,而油松-红桦林、铁杉-糙皮桦林和红桦林群落内华西箭竹的种群密度、平均高度和平均生物量没有显著变化.这些结果说明九寨沟自然保护区内华西箭竹种群生长基本处于停滞状态.华西箭竹具有一个下降种群的年龄结构 ...
张聪 +5 more
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Conservation Biology, EarlyView.Abstract The International Union for Conservation of Nature (IUCN) Red List of Threatened Species is a critical measure of global aquatic and terrestrial biodiversity status. It is also the basis for the Red List Index, which tracks extinction risk over time.
Brittany Finucci +10 more
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Zhongshan Daxue xuebao. Yixue kexue ban, 1984 中华按蚊孳生广泛,种群数量大,是我国重要传疟媒介。深入研究其种群动力学,无论对流行病学或者媒介防制都有重要意义。有关中华按蚊的种群动力学研究,国内目前仅限于实验种群的观察(曲传智,1981,苏寿(氵氏)等,1982)。对现场自然种群的观察,尚未见报道。本文通过现场观察中华按蚊各龄期幼虫存活率的结果,作为研究中华按蚊自然种群动力学的一个组成部分,比较各龄期幼虫的变动情况,分析种群增殖与死亡的相互关系,反映自然界中华按蚊种群变动,为寻找更有效的防制提供依据。
潘实清
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Structured decision‐making as a framework to incorporate social equity into conservation decisions
Conservation Biology, EarlyView.Abstract Many conservation challenges require negotiating trade‐offs between the needs of different actors. Global frameworks such as the Kunming–Montreal Global Biodiversity Framework explicitly call for diverse participation and social equity in conservation decision‐making.
Emily Massingham +2 more
wiley +1 more source
野生动物学报, 2015 非洲企鹅(Spheniscus demersus)是一种濒危海鸟,也是动物园展出的重要物种。上海动物园从日本和荷兰引进非洲企鹅,种群不断扩大,并成为国内种群发展的基础。但对其遗传多样性和结构了解很少,无法开展有效的遗传管理。本研究分析了上海动物园39只非洲企鹅的mtDNA D-loop区430 bp序列,并与已发表的日本种群的数据进行比较。结果表明,该片段存在15个变异位点,占分析位点的3.5%; 共定义了10个单倍型,其遗传距离为0.002～0.019。日本种群包含A、B两个mtDNA D ...
耿广耀 袁耀华 刘群秀 李 波 王爱善 毕延台 徐艳春 杨淑慧
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Intact coastal nursery rearing amid climate‐driven phenological shifts in threatened salmon
Conservation Biology, EarlyView.Abstract Literature linking phenology to climate has proliferated in recent decades and shows that climate change has reorganized seasonal opportunities worldwide. However, this literature often quantifies changes in point measures of timing (e.g., beginnings and peaks) without context about duration (e.g., rearing season length) or performance (e.g ...
Stuart H. Munsch +8 more
wiley +1 more source
Shuitu Baochi Xuebao, 2004 以荒草坡为对照,对黄土丘陵区封禁8年、20年和30年的狼牙刺群落的狼牙刺种群结构及群落土壤水分和养分的特征进行了系统研究,分析了群落恢复与环境因子的关系。在黄土丘陵区,狼牙刺群落通过封禁能够恢复,经过20年恢复种群可达到相对稳定的状态;不同恢复阶段的狼牙刺种群密度、个体平均基径、高度和生物量差异明显:30年>20年>8年>荒草坡。随着狼牙刺群落恢复,种群幼龄个体减少,中老龄个体增加,但种群仍保持扩展趋势,具有进一步发展潜力。不同恢复阶段狼牙刺群落内土壤水分出现了微弱干层,并随根系延伸下移 ...
张文辉 郭连金 徐学华 李登武 刘国彬
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Subspecies taxonomy reflects social and geographic patterns of taxonomic effort in tetrapods
Conservation Biology, EarlyView.Abstract Subspecies have been used in conservation biology to account for intraspecific patterns in genetic diversity, which is crucial to long‐term population viability. Although over 3200 subspecies are currently assessed by the International Union for Conservation of Nature Red List, their biological relevance remains controversial.
Jhonny J. M. Guedes +3 more
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