Phylogeny, niches, and relative abundance in natural communities
Phylogeny, niches, and relative abundance in natural communities
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DOI：
10.1890/07-0322.1
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发表时间：
2008-04-01
期刊：
影响因子：
4.8
通讯作者：
Harvey, Paul H.
中科院分区：
文献类型：
--
作者：
Kelly, Colleen K.;Bowler, Michael G.;Harvey, Paul H.
群落结构是指群落中物种的数量以及个体在这些物种中的分布模式。我们使用一种表示群落结构的新颖方法来表明，在高度多样化的墨西哥森林中，密切相关的共生树种对的丰度比关系较远的树种对的丰度更加公平。这一观察结果与群落结构中性模型的基本假设（即物种是可互换的）不一致。观察到的模式表明生态位分配，其中相互作用集中在同系物之间成对地集中，但远离属水平以上的系统发育结构。因此，生态位过程可能通过调节相当大比例的物种的相对丰度来显着影响群落结构，从而可能增强群落稳定性。一种这样的稳定共存机制已被证明在这片森林中很活跃。
Community structure refers to the number of species in a community and the pattern of distribution of individuals among those species. We use a novel way of representing community structure to show that abundance within closely related pairs of co-occurring tree species in a highly diverse Mexican forest is more equitable than is abundance within more distantly related pairs. This observation is at odds with the fundamental assumption of neutral models of community structure, i.e., that species are interchangeable. The observed patterns suggest niche apportionment, in which interaction is focused pairwise between congeners but falls away from the phylogenetic structure above the genus level. Thus niche processes may significantly affect community structure through regulating relative abundance in a substantial proportion of species, which in turn potentially enhances community stability. One such mechanism of stable coexistence has already been shown to be active in this forest.