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
Therefore despite of similar alpha diversity value, two different samples may have very different community compositions. Beta-diversity is particularly useful in this aspect. Beta-diversity connects biodiversity at the local and regional scale (Barwell, Isaac, & Kunin, 2015; de Miranda, Pereira, ...
As with measures of beta diversity, differences in alpha diversity in relation to maternal obesity were seen predominately in the higher SES group.Jeffrey D. GalleyMichael BaileyClaire Kamp DushSarah SchoppeSullivanLisa M. Christian
Yasun is one of the richest areas sampled for liana diversity in the neotropics. A relatively small group of species (38) comprise the dominants in this forest, as defined by species contributing consistently to 50% of all stems to samples from either habitat. Distance-related diversity (i.e...
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 ...
Alpha testing is only performed by the internal QAs who are well aware of the software codebase. This could limit the diversity of perspectives and skill sets, potentially overlooking specific issues that users with different backgrounds might encounter. It may cause discrepancies between the tester’...
Thus, across a global range of temperate grasslands, plant diversity can predict patterns in the composition of soil microbial communities, but not patterns in alpha diversity. 展开 关键词: Aboveground-belowground interactions archaea bacteria fungi grasslands microbial biogeography soil biodiversity ...
Species diversity may be additively partitioned within and among samples (alpha and beta diversity) from hierarchically scaled studies to assess the proportion of the total diversity (gamma) found in different habitats, landscapes, or regions. We developed a statistical approach for testing null hypoth...
The optimal goal of con- servation is to protect the maximum number of species and habitats with limited funds; hence, unique communities are important for optimizing conservation efforts and beta diversity may be as important as alpha diversity42. The spatial component represents the role of ...