A unified model of island biogeography sheds light on the zone of radiation.
A unified model of island biogeography sheds light on the zone of radiation.
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DOI：
10.1111/j.1461-0248.2011.01617.x
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发表时间：
2011-06
期刊：
影响因子：
8.8
通讯作者：
J. Rosindell;Albert B. Phillimore
中科院分区：
文献类型：
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作者：
J. Rosindell;Albert B. Phillimore
岛屿通过移民和物种形成获得物种。岛屿生物地理学的模型应该涵盖这两个过程；然而，定量的岛屿生物地理学理论要么忽视了物种形成，要么不切实际地对待它。我们引入了一个模型，在这个模型中，随着岛屿面积和与世隔绝的增加，移民在小岛屿和附近岛屿上的主导地位让位于物种形成的日益重要的作用。我们研究了移民和物种形成对35个群岛的鸟类区系的贡献，并发现，与我们的模型一致，辐射区包括两个区域：中等隔离的特有物种从大陆姐妹物种分化出来，以及较高隔离水平的岛屿姐妹物种分化出来。我们的模型还预测了与现有研究一致的物种-面积曲线，并对物种年龄和物种丰度做出了新的预测。我们认为，关于孤立岛屿物种丰富度的数据和理论的匮乏，突显了岛屿生物地理学与主流生态学重新联系的必要性。
Islands acquire species through immigration and speciation. Models of island biogeography should capture both processes; however quantitative island biogeography theory has either neglected speciation or treated it unrealistically. We introduce a model where the dominance of immigration on small and near islands gives way to an increasing role for speciation as island area and isolation increase. We examine the contribution of immigration and speciation to the avifauna of 35 archipelagoes and find, consistent with our model, that the zone of radiation comprises two regions: endemic species diverged from mainland sister-species at intermediate isolation and from insular sister-species at higher levels of isolation. Our model also predicts species-area curves in accord with existing research and makes new predictions about species ages and abundances. We argue that a paucity of data and theory on species abundances on isolated islands highlights the need for island biogeography to be reconnected with mainstream ecology.