Paleo-Drainage Basin Connectivity Predicts Evolutionary Relationships across Three Southeast Asian Biodiversity Hotspots
Paleo-Drainage Basin Connectivity Predicts Evolutionary Relationships across Three Southeast Asian Biodiversity Hotspots
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DOI：
10.1093/sysbio/syt007
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发表时间：
2013-05-01
影响因子：
6.5
通讯作者：
Carvalho, Gary R.
中科院分区：
文献类型：
--
作者：
de Bruyn, Mark;Rueber, Lukas;Carvalho, Gary R.
了解在生物多样性热点地区推动多样性的因素，对于在面临持续和不断加剧的环境恶化的情况下制定保护优先事项至关重要。虽然生物多样性热点只占地球陆地表面的一小部分，但世界上一半以上的植物和三分之二的陆生脊椎动物物种都是这些热点地区特有的。热带东南亚（SE）展示了非凡的物种丰富度，包括四个生物多样性热点，尽管该地区动态的地质和气候历史混淆了物种丰富度的多个潜在驱动因素。在这里，我们使用多位点的分子遗传数据，从密集的多物种采样的淡水鱼在三个生物多样性热点，测试第四纪气候变化和由此产生的排水重排水生动物多样化的影响。虽然新生代的地质过程已经清楚地塑造了东南亚半喙鱼的进化历史，我们表明，第四纪气候变化导致的古排水重新安排发挥了重要作用的时空演变的低地水生类群，并提供优先保护工作。
Understanding factors driving diversity across biodiversity hotspots is critical for formulating conservation priorities in the face of ongoing and escalating environmental deterioration. While biodiversity hotspots encompass a small fraction of Earth's land surface, more than half the world's plants and two-thirds of terrestrial vertebrate species are endemic to these hotspots. Tropical Southeast (SE) Asia displays extraordinary species richness, encompassing four biocliversity hotspots, though disentangling multiple potential drivers of species richness is confounded by the region's dynamic geological and climatic history. Here, we use multilocus molecular genetic data from dense multispecies sampling of freshwater fishes across three biodiversity hotspots, to test the effect of Quaternary climate change and resulting drainage rearrangements on aquatic faunal diversification. While Cenozoic geological processes have clearly shaped evolutionary history in SE Asian halfbeak fishes, we show that paleo-drainage re-arrangements resulting from Quaternary climate change played a significant role in the spatiotemporal evolution of lowland aquatic taxa, and provide priorities for conservation efforts.