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...
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
We compared subsurface and benthic invertebrate responses to drying, to identify common and context銉緀pendent spatial patterns. We characterized community composition, alpha diversity and beta diversity across a gradient of drying duration. Subsurface communities responded to drying, but these responses ...
beta and alpha diversity of the shallow littoral fish communities present in the Andalusian CMSESs and explored how they relate to socioeconomic and marine environmental variables. We used underwater visual surveys to estimate the fish abundance data needed to calculate the alpha and beta diversity ...
Rock pools were disturbed by (1) nutrient enrichment and (2) draining according to three disturbance regimes (none, low, high). Disturbance regimes had little or no effect on alpha diversity of benthic algae and sessile animals. However, the low regime of nutrient enrichment induced greater ...
Distance-related diversity (i.e., beta) is low across both spatially adjacent and distant plots. Floodplain habitats show a slightly higher decay of similarity with distance than either terra firme habitats or cross-habitat comparisons. Cross-habitat comparisons are significantly less similar than ...
这一步主要做Alpha 和beta 多样性分析 还是中文版和英文版 一次参考一下 先上代码-计算多样性 qiime diversity core-metrics-phylogenetic \ --i-phylogeny rooted-tree.qza \ --i-table table.qza \ --p-sampling-depth 1109 \ --m-metadata-file sample-metadata.tsv \ ...
zeta多样性(Zeta diversity)于2014年被首次提出,明确考虑到物种的稀有性和共性,量化所有潜在物种在多个样点中的重叠程度,即zeta多样性描述在多个地点共享的类群数量。Zeta多样性可以通过R包“Zetadiv”来实现便捷计算与分解。Zeta多样性在微生物、昆虫、小型哺乳动物等领域已经有所应用。Bay等人在研究中指出,zeta随样本...
zeta多样性(Zeta diversity)于2014年被首次提出,明确考虑到物种的稀有性和共性,量化所有潜在物种在多个样点中的重叠程度,即zeta多样性描述在多个地点共享的类群数量。Zeta多样性可以通过R包“Zetadiv”来实现便捷计算与分解。Zeta多样性在微生物、昆虫、小型哺乳动物等领域已经有所应用。Bay等人在研究中指出,zeta随样本...
Proposing a resolution to debates on diversity partitioning (1) What is the precise meaning of the "independence" or "statistical independence" of alpha diversity and beta diversity? (2) Which partitioning (... A Chao,CH Chiu,TC Hsieh - 《Ecology》 被引量: 278发表: 2012年 Independence of ...