Habitat history improves prediction of biodiversity in rainforest fauna
Habitat history improves prediction of biodiversity in rainforest fauna
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DOI：
10.1073/pnas.0505754103
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发表时间：
2006-01-17
影响因子：
11.1
通讯作者：
Williams, SE
中科院分区：
文献类型：
--
作者：
Graham, CH;Moritz, C;Williams, SE
生物多样性的模式应根据当代和历史的影响来解释;然而，迄今为止，大多数解释多样性模式的尝试在很大程度上忽视了历史，或者无法量化历史进程的影响。多样性格局的历史影响已被假设为最重要的分类群体与穷人的传播能力。我们量化的相对稳定的热带雨林在第四纪晚期的热带雨林扩张和收缩在澳大利亚东北部的21个地理分区在四个时间段的建模。我们表明，历史栖息地的稳定性可以是重要的，在特有的低分散类群甚至更重要，比目前的栖息地面积在解释物种丰富度的空间格局。与此相反，具有高扩散能力的类群的特有物种丰富度的模式是最好的预测使用当前的环境参数。我们还表明，整个地区的物种周转的当代模式是最好的解释栖息地连接的历史模式。这些结果清楚地表明，在空间上明确的分析的历史进程的持久性和殖民化是有效的和必要的了解观察到的生物多样性模式。
Patterns of biological diversity should be interpreted in light of both contemporary and historical influences; however, to date, most attempts to explain diversity patterns have largely ignored history or have been unable to quantify the influence of historical processes. The historical effects on patterns of diversity have been hypothesized to be most important for taxonomic groups with poor dispersal abilities. We quantified the relative stability of rainforests over the late Quaternary period by modeling rainforest expansion and contraction in 21 biogeographic subregions in northeast Australia across four time periods. We demonstrate that historical habitat stability can be as important, and in endemic low-dispersal taxa even more important, than current habitat area in explaining spatial patterns of species richness. In contrast, patterns of endemic species richness for taxa with high dispersal capacity are best predicted by using current environmental parameters. We also show that contemporary patterns of species turnover across the region are best explained by historical patterns of habitat connectivity. These results clearly demonstrate that spatially explicit analyses of the historical processes of persistence and colonization are both effective and necessary for understanding observed patterns of biodiversity.