在探讨生物多样性时，我们常常提到两个重要的辛普森指数：辛普森多样性指数（Simpson's diversity index）和辛普森相似性指数（Simpson similarity index），这两个指数在物种多样性评估中扮演着关键角色，但它们关注的焦点不同。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...
Beta銉緄versity patterns varied and no consistent patterns distinguished the total diversity, turnover or nestedness of subsurface compared to benthic communities. In response to increasing drying duration, beta diversity increased or remained stable for benthic communities, but remained stable or decreased...
之后计算Beta多样性 这里的代码使用的是官网上201802的,和之前2017的有一点点区别,主要是分组的时候 --m-metadata-category 要改为 --m-metadata-column qiime diversity beta-group-significance \--i-distance-matrix core-metrics-results/unweighted_unifrac_distance_matrix.qza \--m-metad...
Beta分解的相关研究群体主要是动植物,微生物组比较少。BAS方法主要基于Sørensen指数,将两两群落间总体beta多样性(βsor)分解为物种空间周转组分(βsim)嵌套组分(βsne)。 【图】Li等人在研究中分析了人类土地利用系统对不同功能群落相似性的效应大小,其中使用beta分解分析将群落相似性分解为总体beta多样性、空间周转...
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
Li, Z. et al. Colonization ability and uniformity of resources and environmental factors determine biological homogenization of soil protists in human land‐use systems. Global Change Biology 30, e17411 (2024). Si, X. et al. Beta-diversity partitioning: methods, applications and perspectives. Bio...
【图】Li等人在研究中分析了人类土地利用系统对不同功能群落相似性的效应大小,其中使用beta分解分析将群落相似性分解为总 03、zeta多样性分析 几乎所有的组成相似性或者相异性度量都是两两比较得出的,当涉及到三个或者更多的集合的比较时,使用成对相似度的平均值。zeta多样性(Zeta diversity)于2014年被首次提出,明确...
2014. Phylogenetic alpha and beta diversity in tropical tree assemblages along regional-scale environmental gradients in northwest South America. Journal of Plant Ecology 7: 145-153.Gonzalez-Caro S, Umana MN, Alvarez E, et al. (2014) Phylogenetic alpha and beta diversity in tropical tree ...
Our objective in this study was to experimentally determine the effect of high and low disturbance regimes, frequency and intensity combined, on marine benthic alpha and beta diversity. The experiment was conducted in a rock pool system of the St. Lawrence estuary, Canada. Rock pools were ...
Habitat-related beta diversity probably contributes to total richness in Yasun although abundant liana species in Yasun rarely show absolute restriction to one habitat or the other. A comparison of these data to other sampled sites in the neotropics highlights the problems inherent in comparisons among...