Niche incumbency, dispersal limitation and climate shape geographical distributions in a species-rich island adaptive radiation
Niche incumbency, dispersal limitation and climate shape geographical distributions in a species-rich island adaptive radiation
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DOI：
10.1111/geb.12003
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发表时间：
2013-04-01
影响因子：
6.4
通讯作者：
Losos, Jonathan B.
中科院分区：
文献类型：
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作者：
Algar, Adam C.;Mahler, D. Luke;Losos, Jonathan B.
目的通过将物种特征、繁殖力和扩散成本的估算整合到基于气候的物种分布模型中，检验气候、扩散限制和生物相互作用在岛屿适应性辐射中对物种分布的限制作用。位置伊斯帕尼奥拉岛。方法以26种阿诺利斯蜥蜴为研究对象，采用多元自适应回归样条函数分析气候、物种间相互作用、系统发育历史和扩散限制对物种分布限制的影响。对于每一个物种，我们映射的形态相似性的同源使用已知的生态进口的特征，并预测物种将不太可能发生在气候适宜的地区，如果他们居住的生态相似的物种。扩散限制纳入空间上明确的传播成本的估计，推断栖息地的适宜性的基础上。我们比较了模型，包括形态相似性，传播成本，繁殖和气候与气候的唯一模型。结果进行了评价，对一个空模型，保存物种发生的空间结构。结果气候对物种的分布起主导作用。然而，对于超过三分之一的物种，我们也发现了与物种相互作用的补充效应一致的证据，即生态位占有。这些物种不太可能出现在气候适宜的地区居住的形态相似的物种。扩散限制也补充了大多数物种的气候限制。这些结果是强大的协变与遗传和我们的空模型比较。结论这些结果表明，而不是作为相互排斥的替代品，多个维度的生态位，包括气候限制，生物相互作用和扩散能力，相互作用，以塑造物种分布和当地的相互作用可以影响广泛的地理物种在一个可预测的方式。
Aim To test the role of climate, dispersal limitation and biotic interactions in limiting species' distributions within an island adaptive radiation by integrating species traits, phylogeny and estimates of dispersal cost into climate-based species distribution models. Location Hispaniola. Methods Focusing on 26 species of Anolis lizards, we used multivariate adaptive regression splines to evaluate the contribution of climate, species interactions, phylogenetic history and dispersal limitation to species distributional limits. For each species, we mapped the morphological similarity of congenerics using traits of known ecological import and predicted that species would be less likely to occur in climatically suitable areas if they were inhabited by ecologically similar species. Dispersal limitation was incorporated by generating spatially explicit estimates of dispersal cost, based on inferred habitat suitability. We compared models including morphological similarity, dispersal cost, phylogeny and climate with climate-only models. Results were evaluated against a null model that conserved the spatial structure of species occurrences. Results Climate had a dominant role in shaping species distributions. However, for over one-third of species we also found evidence consistent with supplemental effects of species interactions, i.e. ecological niche incumbency. These species were less likely to occur in climatically suitable areas inhabited by a morphologically similar species. Dispersal limitation also supplemented climatic limits in most species. These results were robust to co-variation with phylogeny and to comparison with our null model. Conclusions These results suggest that, rather than act as mutually exclusive alternatives, multiple dimensions of the ecological niche, including climatic limits, biotic interactions and dispersal capacity, interact to shape species distributions and that local interactions can influence the broad-scale geography of species in a predictable way.