Results 31 to 40 of about 20,496 (171)
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
Study on the distribution and diversity of nanoflagellate in the Yangtze estuary and continental shelf of East China Sea [PDF]
, 2015 本研究应用荧光显微技术、荧光标记颗粒示踪法以及Illumina高通量测序技术，分别于2013年春季、2013年夏季和2013年秋季开展了对长江口及东海陆架区微型鞭毛虫的丰度分布、异养细菌的摄食和群落多样性的研究，并初步探讨了影响微型鞭毛虫分布、摄食和群落多样性的因素。主要结果如下： （1）长江口及东海陆架区微型鞭毛虫的丰度变化范围为0.41-7.15×103cellsml-1，微型鞭毛虫丰度的最高值出现在夏季，最低值出现在秋季，表现出明显的季节变化特征 ...
吴林南
core
Representation of obligate groundwater‐dwelling copepod diversity in European protected areas
Conservation Biology, EarlyView.Abstract Groundwaters sustain diverse surface ecosystems and are populated by metazoan species, mostly invertebrates, that provide fundamental ecological functions and are often of prominent conservation value due to narrow endemism and high phylogenetic rarity.
Francesco Cerasoli +7 more
wiley +1 more source
野生动物学报, 2007 通过对代表厦门5种不同生境类型的8个样地进行鸟类调查,共记录到鸟类17目49科242种,占全国鸟类总种数的19.5%,占福建省鸟类总种数的44.7%。与全国鸟类组成相比,厦门鸣禽和涉禽的物种多样性相对比较丰富;比较5种代表性的生境鸟类多样性,农田物种多样性最丰富（Shannon-Wiener指数H′=5.549 63）,但是其科属多样性却最低(G-F指数DFG=0.53568);森林生境中科属多样性最高（G-F指数D（FG）=0.872282）,特别是科多样性显著高于其他生境（F指数DF=15.8911）
邱春荣
doaj
, 2010 区域尺度物种多样性评价不仅是生物多样性研究的一个重要内容,对于保护区的建设也具有指导意义.选取全国具有代表性的57处自然保护区,构建大尺度陆栖脊椎动物物种多样性数据库,在物种水平上,探讨了一个用于区域物种多样性综合评价的E指数,即给予每个类群相同的权重,由陆栖脊椎动物四大类群综合计算而得.通过对物种丰富度的变形P指数和E指数进行比较,得到以下结论:E指数与物种丰富度有着极显著的相关性,二者都能用来评价物种多样性,但E指数比物种丰富度更能无偏颇地评价区域物种多样性,包含的信息更多 ...
斯琴高娃 +4 more
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Conservation Biology, EarlyView.Abstract Despite the crucial role of human impacts on biodiversity loss, many assessments of this loss focus on single metrics, such as species richness, and overlook the multidimensional effects of human activities. Because of its importance to ecosystem functioning, we investigated the functional diversity of medium‐ and large‐sized mammal ...
Xueyou Li +8 more
wiley +1 more source
野生动物学报, 2022 2019年和2020年的4—9月,采用样带调查法对江西南矶湿地国家级自然保护区爬行动物开展了资源调查,系统分析了南矶保护区爬行动物群落结构、丰富度及空间分布格局。结果表明:区内共记录爬行动物2目6科11种,其中灰鼠蛇(Ptyas korros)和台湾小头蛇(Oligodon formosanus)为保护区物种新纪录; 短尾蝮(Gloydius brevicaudus)为优势种,种群数量占总数的44.07%。从分布型构成上划分,季风型(E)4种、南中国型(S)4种和东洋型(W)3种。多样性分析表明 ...
缪泸君 +5 more
doaj
The impacts of coastal defense structures on rocky intertidal community in Yangtze River Delta [PDF]
, 2016 长江三角洲是长江、黄河以及在此区域的其他河流的活动形成的冲积平原。末次冰期（LastGlacialMaximum，LGM）以后的一万年以来，长江三角洲在海陆交互作用的影响下逐渐扩展。位于长江三角洲地带的近900km的江苏沿岸海岸线除约40km的基岩海岸以外，均为不适宜岩相潮间带生物大量聚集的淤泥质平原海岸。近年来随着中国沿海经济的飞速发展，对土地需求的不断增加，越来越多的沿岸防护建筑正在被修建，成为我国沿岸的“海上长城”。这些沿岸防护建筑显著改变了江苏沿岸的滩涂景观，可能对潮间带群落造成严重影响 ...
黄雄伟
core
Geographic risks to functional groups of mammals and birds from habitat loss in Mexico
Conservation Biology, EarlyView.Abstract There is a need to quantify the impact of habitat loss due to anthropogenic factors on different aspects of biodiversity, such as functional trait diversity represented by functional groups (FGs). We developed a metric to assess the weighted risk of loss of habitat for 33 FGs of mammals and 36 FGs of birds in Mexico based on potential ...
Fernando Mayani‐Parás +4 more
wiley +1 more source
Conservation Biology, EarlyView.Abstract The design of experiments to investigate the combined effects of multiple stressors requires exposing target organisms to multiple combinations of stressor doses. Concurrent manipulation of stressors is often infeasible with wildlife, but long‐lasting health effects allow individual health to be used as an integrator of prior stressor exposure.
Enrico Pirotta +24 more
wiley +1 more source