New Guinea highland origin of a widespread arthropod supertramp
New Guinea highland origin of a widespread arthropod supertramp
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DOI：
10.1098/rspb.2009.0015
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发表时间：
2009-07-07
影响因子：
4.7
通讯作者：
Meier, Rudolf
中科院分区：
文献类型：
--
作者：
Balke, Michael;Ribera, Ignacio;Meier, Rudolf
生物和地质上极其多样的Wallacea，澳大拉西亚和大洋洲群岛长期以来一直激励着生态学家和进化生物学家。然而，很少有分子系统发育分析的陆生动物进行了了解的进化模式。我们使用密集的分类群和字符采样超过7000 bp的DNA序列数据的一组潜水甲虫，从泛北极地区在整个亚洲的远东法属波利尼西亚。我们在这里表明，一个生态多样性，共同的和广泛的（葡萄牙到新西兰）节肢动物supertramp物种起源于新几内亚的高地，约6.0-2.7百万年前。大约25个密切相关的物种是澳大拉西亚/大洋洲的狭窄特有种。这个分支的祖先在大约9-7百万年前从欧亚大陆殖民到那个地区。我们的发现与当地特有性作为进化死胡同的广泛观点相矛盾，因为我们发现更新世内的多个周域物种形成事件和东方和澳大利亚动物地理区域之间的复杂殖民模式，包括欧亚大陆的扩张，跨越华莱士线和新几内亚的澳大利亚大陆的殖民化。我们的研究强烈强调了水隙上的扩散在塑造地理格局中的重要性。
The biologically and geologically extremely diverse archipelagos of Wallacea, Australasia and Oceania have long stimulated ecologists and evolutionary biologists. Yet, few molecular phylogenetic analyses of the terrestrial fauna have been carried out to understand the evolutionary patterns. We use dense taxon and character sampling of more than 7000 bp DNA sequence data for a group of diving beetles ranging from the Holarctic throughout Asia to as far east as French Polynesia. We here show that an ecologically diverse, common and widespread (Portugal to New Zealand) arthropod supertramp species originated in the highlands of New Guinea, ca 6.0-2.7 Myr ago. The approximately 25 closely related species are narrow endemics in Australasia/Oceania. The ancestor of this clade colonized that region from Eurasia ca 9-7 Myr ago. Our finding contradicts the widely held view of local endemism as an evolutionary dead end, as we find multiple peripatric speciation events within the Pleistocene and complex colonization patterns between the Oriental and Australian zoogeographic regions, including the recolonization of Eurasia, jumping across Wallace's line and colonization of continental Australia out of New Guinea. Our study strongly highlights the importance of dispersal over water gaps in shaping biogeographic patterns.