Results 51 to 60 of about 20,124 (185)
Zhejiang Daxue xuebao. Lixue ban, 2006 在对凤阳山白豆杉种群进行野外调查的基础上，分析了其群落的区系及物种多样性.结果表明：凤阳山白豆杉群落中共有维管植物59科104属160种（含变种），其中蕨类植物5科6属8种，裸子植物4科7属8种，被子植物49科88属142种.区系成分复杂，大部分属于温带和热带分布类型，其中温带类型占总属数的58.
DINGBing-yang(丁炳扬“) +3 more
doaj +1 more source
The Synecological Studies on Castanopsis Forest in Fujian Province [PDF]
, 2017 锥属植物往往是亚热带常绿阔叶林的建群种，锥林研究可以为植被分类研究提供许多重要数据。本文在对福建省自然保护区内保护良好的锥林样地调查的基础上，结合收集的全省已有的多个锥林调查数据资料，对其进行群落结构、区系特征、生物多样性等群落生态学特征以及优势种种间关系研究。分析整个福建锥林群系组整体特征以及各锥林群系特征，并探讨不同锥属种群在群落中所处的作用与地位。主要结论如下： 1、锥属树种为建群种的常绿阔叶林（锥林）的乔木层常由多个种群共建，灌木层上下两层组成略有不同。由于乔灌层的郁闭度较高，草本层相对空旷 ...
江昕怡
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Evaluating past and future contributions of conservation programs to species recovery
Conservation Biology, EarlyView.Abstract Impact evaluation of conservation actions is a crucial step in global efforts to curb the biodiversity crisis. Through robust impact evaluation, practitioners can assess the effectiveness of conservation strategies and optimize the use of limited resources.
Rebeca E. Young +10 more
wiley +1 more source
Genetic diversity of Noctiluca scintillans [PDF]
, 2016 夜光藻是一种常见的赤潮藻，在世界大部分近海海域均有分布。目前普遍认为夜光藻只有一个种，但还没有研究探索不同地理种群的夜光藻是否产生了种内变异。本研究通过单细胞PCR以及单细胞克隆文库的方法，比较了中国黄海、东海、南海，墨西哥湾以及阿拉伯海5个海域夜光藻核糖体基因的遗传多样性。主要研究结果如下： 1、发现22种ITS单倍型(n=103)，12种28S单倍型(n=25)，6种18S单倍型(n=31)；这3个基因的单倍型多样度(Hd)分别为0.824、0.670、0.557，核苷酸多样度(π)分别为0 ...
潘永柏
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Lessons from an eradication under multiple constraints of an island rat population of record density
Conservation Biology, EarlyView.Abstract Invasive rats threaten island biodiversity, disrupting ecosystems and endangering native species. Although rat eradication has succeeded on many islands, tropical islands present unique management challenges. Strict regulations and financial constraints on some tropical islands further limit proven eradication methods, complicating rodent ...
Tatiane Micheletti +7 more
wiley +1 more source
, 2003 本文为武夷山自然保护区生物多样性GEF项目内容之一,调查了保护区内不同海拔高度的代表性森林生态系统的物种多样性。亮叶水青冈林是山地的代表性森林生态系统之一。应用Shannon—Wiener多样性指数、Pielou均匀度、Simpson指数和PIE对武夷山亮叶水青冈群落高等植物进行了物种多样性研究。结果表明该群落的Shannon—Wiener指数值为1.2973,Pielou均匀度为34.71％,Simpson指数为2.4777,PIE为0.5964,群落的乔木层物种多样性较高,各项多样性指数分别为2 ...
何建源 +8 more
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A link between increased temperature and avian body condition in a logged tropical forest
Conservation Biology, EarlyView.Abstract The combined effects of anthropogenic disturbances, such as logging and climate change, remain poorly understood; yet, they are the main threats to tropical biodiversity. Most tropical African countries lack long‐term climate data, so climate impacts on biodiversity cannot be assessed.
Moreen Uwimbabazi +7 more
wiley +1 more source
Shuitu Baochi Xuebao, 2007 原生植被优势种及生物多样性的空间分布特征对于青藏铁路沿线植被恢复和重建具有重要的理论指导意义。在对青藏铁路沿线1142 km设置27个样带、248个样地、2242个样方进行系统调查的基础上,系统研究了青藏铁路沿线植物群落优势种组成及生物多样性空间分布规律。在铁路沿线样方中共出现种子植物305个种与变种,22个灌木种,283个草本种和亚种,分别隶属于40科、134属;优势种种类相对较少,共40种,灌木4种;物种丰富度（S）沿铁路呈南多北少趋势,在高平原地段丰富度相对较高,且随海拔的升降而升降 ...
周金星 +3 more
doaj
The comparison of the ecological characters of the zooplankton between the coastal waters off Cangnan and the waters off Feiyun River estuary [PDF]
, 2015 为了研究我国亚热带北部边缘浮游动物区系和生态类群，从而为分析我国亚热带海域浮游动物群落特征形成的成因提供科学依据。本研究根据2010年~2011年在飞云江口外水域(27°46'~27°75'N,120°66'~121°01'E)冬、春、秋3个季节和2011年在苍南近岸水域(26°94'~27°27'N,120°41'~120°76'E)冬、春、夏季3个季节的海洋综合调查资料，在分析了我国亚热带北部边界的飞云江口外水域和苍南近岸水域这两个不同水域浮游动物的种类组成、区系适应性、优势种、物种多样性 ...
董开兴
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How much biotic nativeness matters across human demographic groups
Conservation Biology, EarlyView.Abstract Many central concepts of conservation biology—such as nativeness—are structured by ecological and social factors. However, the social consequences of using these concepts to make conservation decisions remain inadequately understood. Some researchers argue that nativeness, rather than acting as an objective proxy for important ecological ...
Harold N. Eyster, Rachelle K. Gould
wiley +1 more source