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Effect of lack of continental ice sheet on speciation in Palaearctic birds.

大陆冰盖缺乏对古北界鸟类物种形成的影响。

基本信息

批准号：
21770093
负责人：
SAITOH Takema
金额：
$ 2.91万
依托单位：
Yamashina Institute for Ornithology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Young Scientists (B)
财政年份：
2009
资助国家：
日本
起止时间：
2009 至 2011
项目状态：
已结题

项目摘要

Unlike northern Europe and most of northern North America, the Eastern Palearctic is believed to have been almost unglaciated during the Quarternary glacial periods. Under such geological history condition, how it affects speciation and genetic characteristic of Palaearcitc birds? To evaluate this, I studied the phylogeography in east Eurasia of various breeding passerine birds. As a result, I found several species that have deep DNA divergence within species in Japan and/or surrounding area. Such species are Arctic Warbler, Oriental Greenfinch, Pale-legged Leaf Warbler, Ijima's Leaf Warbler, Black-faced Bunting, Skylark, Narcissus Flycatcher and Black Paradise Flycatcher. These results indicate that lineages have maintained their integrity through several successive glaciations. Remaining lineages caused by the isolation mechanism without the ice sheet may explain the new way of speciation.

与北方欧洲和北美北方的大部分地区不同，东部古北界被认为在第四纪冰期几乎没有冰川作用。在这样的地质历史条件下，它对古北鸟类的物种形成和遗传特征有何影响？为了评估这一点，我研究了欧亚大陆东部各种雀形目鸟类的繁殖地理。结果，我发现了几个物种在日本和/或周边地区的物种中有很深的DNA分歧。这些物种是北极柳莺，东方绿雀，浅腿叶莺，伊岛叶莺，黑面彩旗，云雀，水仙和黑天堂。这些结果表明，谱系通过几次连续的冰川作用保持了其完整性。没有冰盖的隔离机制所造成的残余谱系可能解释了新的物种形成方式。