Results 21 to 30 of about 4,340 (165)
Methods in Ecology and Evolution, EarlyView.Abstract DNA barcode‐based species identification has become pivotal in biodiversity research. Current barcoding‐based deep learning methods have advantages in species identification but exhibit significant limitations. By using COI barcoding alone, previous studies were unable to fully capture species identification features. Prior methods showed that
Bin Ye +4 more
wiley +1 more source
野生动物学报, 2008 根据扎龙湿地实际情况,将其划分为3种人为干扰强度地区,并进行了鸟类群落结构调查。统计3种干扰地区的物种丰富度,用Shannon-Winener指数计算物种多样性指数,用Pielou指数式计算物种均匀度指数,并用数量数据的β多样性测度公式分析人为干扰强度对扎龙湿地鸟类群落结构的影响。结果表明扎龙湿地鸟类的物种丰富度、物种多样性和物种均匀度与人为干扰强度成紧密的负相关关系。
杨敏, 吴庆明, 齐锐, 孔维尧
doaj
Study on latitudinal gradient of species diversity in forest communities [PDF]
, 2015 森林群落结构和物种多样性的空间分异规律一直是生态学研究的热点问题。近年来，关于森林群落结构的描述与物种多样性的测定方法等研究也都有所发展，但这些研究大多是对森林生态系统的定性描述，而且方法不一，数据之间也缺乏可比性。 群落的组成结构是群落的重要标志，研究群落结构是研究群落物种多样性意义的理论基础，所以从群落组成结构的角度来探讨生物群落的物种多样性具有重要的意义，为进一步深入研究生物多样性功能及确定功能群提供理论基础 ...
孙影
core
Conservation Biology, EarlyView.Abstract Measuring area‐based conservation outcomes in tropical forests is challenging due to cryptic human disturbances (e.g., hunting). As a result, comparative studies of management strategies providing quantitative outcomes remain scarce, especially in the Neotropics.
Lucy Perera‐Romero +5 more
wiley +1 more source
牛山湖两种优势小型鱼类空间分布与沉水植被的关系! [PDF]
, 2012 运用8种网目规格的成套浮性刺网作为鱼类采样工具,于2005年夏季在长江中游浅水草型湖泊牛山湖进行鱼类定量采样,通过比较不同茂密程度黄丝草生境中的小型鱼类组成、数量和大小结构,探讨此类湖泊小型鱼类的空间分布特征及其与沉水植被的关系.采样期间共捕获13种1124尾鱼,依据其等级丰度和出现频次,和红鳍原!为该湖优势上层小型鱼类.在调查的沉水植物生物量范围内,鱼类物种丰富度和Shannon多样性指数与沉水植物生物量之间呈现倒抛物线关系;两种优势小型鱼类的种群丰度均与沉水植物生物量有着显著的线性正相关关系 ...
刘家寿 +3 more
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Traceability of Geographic Origin Using Human Skin and Oral Microbiota [PDF]
, 2023 Objective To explore the possibility of using human skin and oral microorganisms to estimate the geographic origin of an individual through the sequencing analysis of bacterial 16S rRNA gene.
Xin-yu DONG, Ru-xin ZHU, Yin-lei LEI, Rui-yang TAO, Cheng-tao LI
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Success of restoration strategies in preventing extirpation of 2 critically endangered coral species
Conservation Biology, EarlyView.Abstract An unprecedented marine heatwave in 2023 caused widespread coral bleaching and mortality throughout the Caribbean. In the Florida Keys (USA), 2 foundation species, elkhorn coral (Acropora palmata) and staghorn coral (Acropora cervicornis), were severely affected.
Erinn M. Muller +29 more
wiley +1 more source
野生动物学报, 2009 基于现有的安徽省两栖爬行动物分布资料,系统整理物种分布数据,建立两栖爬行动物地理分布原始数据库。运用GIS技术,以县级行政区为地理单元,分析物种丰富度格局,通过多元统计分析,研究物种多样性的区域分异。结果表明,皖南山地丘陵和大别山山地丘陵地带物种丰富度最高:淮北平原、江淮丘陵的物种丰富度相对较低;但淮北平原和江淮丘陵的部分山地丘陵物种丰富度相对较高。根据各县的分布型物种数量分布,当聚为2组（Jaccard系数大于7.612）时,安徽省物种分布型区域分异基本上呈现山区系组（皖南山区和大别山区 ...
李中文, 周立志
doaj
Study on phytoplankton community similarity and ecological connectivity in northern Beibu Gulf [PDF]
, 2015 浮游植物是海洋生态系统中主要的初级生产者，是构成海洋生态系统食物网的基础环节，其种类变化和群落结构直接影响海洋生态系统的结构和功能，在海洋生态系统的物质循环和能量流动过程中起着重要作用。本文以2006~2007年于北部湾进行的四个航次的调查数据，分析了北部湾北部浮游植物的种类组成、数量变化、群落结构以及生物多样性，探讨了浮游植物的群落演替和群落相似性及生态连通性的调控机制，获得主要结果如下： （1）北部湾北部浮游植物四季共鉴定273种（含变种和变型），隶属于5门78属，种类组成以广温类和暖水类为主 ...
王符菁
core
Biodiversity characteristics of large forest plots in Qinghai area of Qilian Mountain National Park [PDF]
[Objective] Long-term monitoring of plant community dynamics in large forest plots helps reveal the spatial patterns and underlying mechanisms that sustain species diversity.
DU Yangong +3 more
core +1 more source