Biotic colonization of subtropical East Asian caves through time

2023-01-17

  作  者:Li XQ, Xiang XG, Jabbour F, Hagen O, Ortiz RD, Soltis PS, Soltis DE, Wang W*

  影响因子:12.779

  刊物名称:Proceedings of the National Academy of Sciences of the United States of America

  出版年份:2022

  卷:19 期:34 页码:e2207199119

  论文摘要:

  Caves are home to unique and fragile biotas with high levels of endemism. However, little is known about how the biotic colonization of caves has developed over time, especially in caves from middle and low latitudes. Subtropical East Asia holds the world's largest karst landform with numerous ancient caves, which harbor a high diversity of cave-dwelling organisms and are regarded as a biodiversity hotspot. Here, we assess the temporal dynamics of biotic colonization of subtropical East Asian caves through a multi-taxon analysis with representatives of green plants, animals, and fungi. We then investigate the consequences of paleonviromental changes on the colonization dynamics of these caves in combination with reconstructions of vegetation, temperature, and precipitation. We discover that 88% of cave colonization events occurred after the Oligocene-Miocene boundary, and organisms from the surrounding forest were a major source for subtropical East Asian cave biodiversity. Biotic colonization of subtropical East Asian caves during the Neogene was subject to periods of acceleration and decrease, in conjunction with large-scale, seasonal climatic changes and evolution of local forests. This study highlights the long-term evolutionary interaction between surface and cave biotas; our climate-vegetation-relict model proposed for the subtropical East Asian cave biota may help explain the evolutionary origins of other mid-latitude subterranean biotas.

  全文链接:https://www.pnas.org/doi/full/10.1073/pnas.2207199119


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