Ancient River Inference Explains Exceptional Oriental Freshwater Mussel Radiations.
Ancient River Inference Explains Exceptional Oriental Freshwater Mussel Radiations.
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DOI：
10.1038/s41598-017-02312-z
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发表时间：
2017-05-18
影响因子：
4.6
通讯作者：
Tumpeesuwan S
中科院分区：
文献类型：
--
作者：
Bolotov IN;Kondakov AV;Vikhrev IV;Aksenova OV;Bespalaya YV;Gofarov MY;Kolosova YS;Konopleva ES;Spitsyn VM;Tanmuangpak K;Tumpeesuwan S
长寿（古）湖泊的概念对进化地理学的发展产生了很大的影响。根据这一观点，地球上的一些湖泊已经存在了几百万年（例如，贝加尔湖和坦噶尼喀），并代表独特的演化热点与多个盆地内的辐射。相比之下，河流通常被认为是可变的系统，它们在地质时代长期存在的可能性从未得到过检验。在这项研究中，我们重建的淡水流域的历史相互作用的基础上，跨大陆的多位点的化石校准淡水贻贝（蚌科）的发育。这些贻贝最有可能起源于侏罗纪的东南亚和东亚，最早的扩张到北美和非洲（自白垩纪中期以来），之后是欧洲和印度的殖民化（自古新世以来）。我们在古湄公河流域发现了两个古老的单系贻贝辐射（平均年龄~51-55 Ma）（即，湄公河、暹罗和马六甲海峡古河流流域）。我们的研究结果表明，湄公河可以被认为是一个长寿的河流，已经存在于整个新生代时代。
The concept of long-lived (ancient) lakes has had a great influence on the development of evolutionary biogeography. According to this insight, a number of lakes on Earth have existed for several million years (e.g., Baikal and Tanganyika) and represent unique evolutionary hotspots with multiple intra-basin radiations. In contrast, rivers are usually considered to be variable systems, and the possibility of their long-term existence during geological epochs has never been tested. In this study, we reconstruct the history of freshwater basin interactions across continents based on the multi-locus fossil-calibrated phylogeny of freshwater mussels (Unionidae). These mussels most likely originated in Southeast and East Asia in the Jurassic, with the earliest expansions into North America and Africa (since the mid-Cretaceous) following the colonization of Europe and India (since the Paleocene). We discovered two ancient monophyletic mussel radiations (mean age ~51–55 Ma) within the paleo-Mekong catchment (i.e., the Mekong, Siam, and Malacca Straits paleo-river drainage basins). Our findings reveal that the Mekong may be considered a long-lived river that has existed throughout the entire Cenozoic epoch.