期刊
ECOLOGY
卷 94, 期 11, 页码 2426-2435出版社
WILEY
DOI: 10.1890/12-1577.1
关键词
Arecaceae; historical legacies; macroecology; Neogene; nonequilibrium dynamics; paleoclimate; Palmae; past climate change; refugia; species richness; tropics
类别
资金
- Danish Council for Independent Research- Natural Sciences [11-106163, 10-083348, 12-125079]
- Villum Kann Rasmussen Foundation [VKR09b-141]
- European Research Council [ERC-2012-StG-310886-HISTFUNC]
- Aarhus University
- Aarhus University Research Foundation under the AU IDEAS program (via Center for Informatics Research on Complexity in Ecology, CIRCE)
Past climatic changes have caused extinction, speciation, and range dynamics, but assessing the influence of past multimillion-year climatic imprints on present-day biodiversity patterns remains challenging. We analyzed a new continental-scale data set to examine the importance of paleoclimatic effects on current gradients in African palm richness patterns. Using climate reconstructions from the late Miocene (approximate to 10 mya), the Pliocene (approximate to 3 mya), and the Last Glacial Maximum (0.021 mya), we found that African palm diversity patterns exhibit pronounced historical legacies related to long-term climate change. Notably, pre-Pleistocene paleoprecipitation variables differentially affected current diversity patterns of palms grouped by contrasting habitat requirements. Accounting for present-day environment, rain forest palms exhibit greater species richness in localities where Pliocene precipitation was relatively high, whereas open-habitat palms show higher species richness in areas of relatively low precipitation during the Miocene Epoch. Our results demonstrate that diversity-climate relationships among African palm species include multimillion-year lagged dynamics, i.e., with historical legacies persisting across much longer time periods than commonly recognized.
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