beta diversity 英[ˈbi:tə dɪˈvɜ:sɪti:] 美[ˈbetə dɪˈvəsɪti] 释义 β多样性 行业词典 生态学 β多样性又称“β丰富度(beta richness)”。在一个环境梯度上,从一个生境到另一个生境之间所发生的物种数目的变化,亦即群落间的物种多样性。
在宽泛的物种多样性的领域内有两个辛普森指数,虽然名字相似,但是本质不同,Simpson's diversity index 用于计算物种丰富度和相对丰度(alpha多样性),而Simpson similarity index 或 Simpson similarity index 用于计算不同的取样单位内的物种相似性(beta 多样性)。
Beta-diversity (unweighted).Mahnert, AlexanderVaishampayan, ParagJ. Probst, AlexanderAuerbach, AnnaMoisslEichinger, ChristineVenkateswaran, KasthuriBerg, Gabriele
在微生物组研究中，alpha diversity即“分析在单个样本中有多少种不同的序列”；beta diversity即“分析在一定范围内样本中，各种不同序列的分布情况”。网页链接 网页链接
辛普森多样性指数主要用于评估物种丰富度和相对丰度（alpha多样性），而辛普森相似性指数则侧重于测量不同取样单位内的物种相似性（beta多样性）。辛普森多样性指数由英国统计学家Edward Hugh Simpson于1949年提出，主要用于计算物种丰富度和相对丰度。此指数通过计算物种多样性，考虑了物种的丰富度（样本中不同...
6) Beta-spline function Beta样条函数 1. In this paper,image edge detection in video tracking is put forward based on Beta-spline function. 介绍了视频跟踪中图像边缘检测的基于Beta样条函数的边缘检测算子,该算法是利用Beta样条函数对原始图像进行拟合,然后求拟合曲面的二阶导数零交叉点来检测图像的边缘...
Beta diversity measures the change in diversity of species from one environment to another. In simpler terms, it calculates the number of species that are not the same in two different environments. There are also indices which measure beta diversity on
Our study aimed to evaluate how the physical and chemical characteristics of water, species dispersal, and land use affect the spatial beta diversity of phytoplankton (species composition and Morphology-Based Functional Groups鈥擬BFG) in 50 lakes connected to the Araguaia River over a distance of ...
Global beta-diversity (dissimilarity) decreased significantly with absolute latitude, which supports the general expectations of the LDG (Table1; Supplementary Fig.2). More generally, site comparisons between communities at higher latitudes were more similar to each other than site comparisons between com...
Local maximum of beta diversity is repeatedly calculated in 5 m extent observational windows shifted along the transect with 1 m lag, and the spatial variability of vegetation is visualized by the related beta-diversity profile. Using field example, we demonstrate that beta diversity, when applied ...