Molecular Phylogeny, Biogeography, and Habitat Preference Evolution of Marsupials
Molecular Phylogeny, Biogeography, and Habitat Preference Evolution of Marsupials
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DOI：
10.1093/molbev/msu176
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发表时间：
2014-09-01
影响因子：
10.7
通讯作者：
Cooper, Alan
中科院分区：
文献类型：
--
作者：
Mitchell, Kieren J.;Pratt, Renae C.;Cooper, Alan
有袋动物在生态和形态上表现出极大的多样性。然而，与它们的姐妹群体胎盘哺乳动物相比，我们对有袋动物进化的许多方面的理解仍然有限。我们使用101个线粒体基因组和26个核基因座的数据重建了一个过时的物种发生，包括97%的现存属和58%的现代有袋类物种。这棵树使我们能够分析有袋动物物种的栖息地偏好和地理分布随时间的演变。我们发现了一种适应中温环境的谱系模式，这种模式演变为使用更干旱和开放的栖息地，这与区域气候和环境变化大致一致。然而，与总的趋势相反，一些血统随后似乎已经从更干燥的梅西奇栖息地恢复。生物地理重建表明，在中新世和上新世期间，澳大利亚和新几内亚/Wallacea之间的连通性，目前的看法需要修改。几个地方性新几内亚分支的古老性强烈表明了一个可以追溯到中新世中期的更古老的连接时期，并意味着新几内亚在其主要形成后几乎立即被多个分支殖民。
Marsupials exhibit great diversity in ecology and morphology. However, compared with their sister group, the placental mammals, our understanding of many aspects of marsupial evolution remains limited. We use 101 mitochondrial genomes and data from 26 nuclear loci to reconstruct a dated phylogeny including 97% of extant genera and 58% of modern marsupial species. This tree allows us to analyze the evolution of habitat preference and geographic distributions of marsupial species through time. We found a pattern of mesic-adapted lineages evolving to use more arid and open habitats, which is broadly consistent with regional climate and environmental change. However, contrary to the general trend, several lineages subsequently appear to have reverted from drier to more mesic habitats. Biogeographic reconstructions suggest that current views on the connectivity between Australia and New Guinea/Wallacea during the Miocene and Pliocene need to be revised. The antiquity of several endemic New Guinean clades strongly suggests a substantially older period of connection stretching back to the Middle Miocene and implies that New Guinea was colonized by multiple clades almost immediately after its principal formation.