An assessment of the dependence of evenness indices on species richness
An assessment of the dependence of evenness indices on species richness
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DOI：
10.1016/j.jtbi.2006.04.017
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发表时间：
2006-10-07
影响因子：
2
通讯作者：
Gosselin, Ferderic
中科院分区：
文献类型：
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作者：
Gosselin, Ferderic
均匀度是物种多样性的组成部分，在数学上与物种丰富度无关。然而，早期的工作质疑这种独立性的普遍性。然而，这项早期的工作只涉及一些相对丰度分布（RAD），非常有限的物种丰富度梯度，或均匀度指数，如皮埃卢指数，没有定义的一个精确的，连贯的公理集。我们发现，对于非常不同的理论RAD，均匀度指数和物种丰富度之间的关系确实存在，并且是强的，至少对于一些RAD和/或当物种丰富度低于20。此外，这种关系大多是负面的，这与以前的一些研究相矛盾。我们还表明，对于我们测试的非常不均匀的RAD，均匀度指数更依赖于物种丰富度比多样性指数。最后，我们讨论了背后的哲学分析均匀度丰富度的关系内和之间的RAD，以及物种丰富度变化时，物种丰富度校正均匀度指数的兴趣，特别是许多值低于20。(c)2006爱思唯尔有限公司版权所有。
Evenness is the component of species diversity that was built to be mathematically independent from species richness. Yet, earlier work questioned the generality of this independence. However, this earlier work involved only a few relative abundance distributions (RADs), very limited gradients of species richness, or evenness indices, such as Pielou's index, that were not defined in relation to a precise, coherent set of axioms. We show that for very different theoretical RADs, a relationship between evenness indices and species richness does exist and is strong-at least for some RADs and/or when species richness is under 20. Furthermore, this relationship is mostly negative, which contradicts some previous studies. We also show that, for the very uneven RADs we tested, evenness indices depend even more on species richness than diversity indices do. Finally, we discuss the philosophy behind the analysis of evenness-richness relationships within and between RADs, as well as the interest of correcting evenness indices for species richness when species richness varies, especially with many values under 20. (c) 2006 Elsevier Ltd. All rights reserved.