2010 Fiscal Year Final Research Report
Effect of lack of continental ice sheet on speciation in Palaearctic birds.
| Project/Area Number |
21770093
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | Yamashina Institute for Ornithology |
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Principal Investigator |
SAITOH Takema Yamashina Institute for Ornithology, 自然誌研究室, 研究員 (40521761)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 種分化 / 大陸氷河 / 旧北区 / 北方系鳥類 / ミトコンドリアDNA |
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| Research Abstract |
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.
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