Relative importance of habitat use, range expansion, and speciation in local species diversity of Anolis lizards in Cuba
Relative importance of habitat use, range expansion, and speciation in local species diversity of Anolis lizards in Cuba
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DOI：
10.1890/es12-00383.1
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发表时间：
2013-07-01
期刊：
影响因子：
2.7
通讯作者：
Kawata, Masakado
中科院分区：
文献类型：
--
作者：
Cadiz, Antonio;Nagata, Nobuaki;Kawata, Masakado
当地群落物种丰富度的变化可以用当地的生态过程或大规模的进化和生物地理过程来解释。在Anolis蜥蜴中，不同生态形态的物种可以通过占据不同的生态位而共存。此外，具有相同生态形态(例如，树干-地面)的几个物种可以共存，并且树干-地面变态物种的数量在当地物种组合中有所不同。在这项研究中，我们评估了生态相互作用、物种形成事件的数量和范围扩展对这些蜥蜴本地和区域物种多样性的重要性。我们研究了古巴11个地方群落中12种树干-地面变态植物的物种丰富度和温度微生境划分(被认为是生态相互作用的衡量标准)。结果表明，躯干-地面变态蜥蜴群落的系统发育结构具有随机性。然而，对热微生境使用的偏好过度分散，这表明微生境使用的差异很可能发生在群落内。我们认为，区域内物种形成事件的数量和共生物种的数量增加了地方一级的物种丰富度。迁徙似乎是有限的，导致只有三个不同温度要求的物种的活动范围扩大。物种的热生态位在Anolis allogus分支内是保守的，而在Anolis homolecits和Anolis sgrei分支内的物种则倾向于改变其热生态位。我们的结果表明，物种组成和丰富度可以由进化历史(物种形成事件的数量和范围扩展的限制)和生态过程(栖息地划分)来解释。在生态因素中，温度(微生境使用)和结构生态位(例如植被)的数量可能限制当地群落内共存物种的潜在数量。
Variations in species richness of local assemblages may be explained by local ecological processes or large-scale evolutionary and biogeographical processes. In Anolis lizards, species with different ecomorphs can coexist by occupying different niches. In addition, several species with the same ecomorph (e. g., trunk-ground) can coexist, and the number of trunk-ground anole species varies among local species assemblages. In this study, we assessed the importance of ecological interactions, number of speciation events, and range expansion for local and regional species diversity of these lizards. We examined the species richness and thermal microhabitat partitioning (considered to be a measure of ecological interaction) of 12 trunk-ground anole species in 11 local assemblages in Cuba. The results indicated that the phylogenetic structure of trunk-ground anole lizard assemblages was random. However, there was an overdispersion of preferences for thermal microhabitat use, which indicates that differences in microhabitat use are likely to occur within assemblages. We suggest that the number of speciation events within regions and the number of sympatrically coexisting species increases species richness at the local level. Migration appeared to be limited, leading to the range expansion of only three species with different thermal requirements. The thermal niches of species were conserved within Anolis allogus clade, whereas species within the Anolis homolechis and Anolis sagrei clades tended to change their thermal niches. Our results suggest that the species composition and richness in local assemblages could be explained by evolutionary history (the number of speciation events and limits to range expansion) and ecological processes (habitat partitioning). Of the ecological factors, the number of thermal (microhabitat use) and structural niches (e.g., vegetation) could limit the potential number of coexisting species within a local assemblage.