Different phylogeographic patterns in two Japanese Silpha species (Coleoptera: Silphidae) affected by climatic gradients and topography
Different phylogeographic patterns in two Japanese Silpha species (Coleoptera: Silphidae) affected by climatic gradients and topography
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DOI：
10.1111/j.1095-8312.2009.01283.x
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发表时间：
2009-10-01
影响因子：
1.9
通讯作者：
Sota, Teiji
中科院分区：
文献类型：
--
作者：
Ikeda, Hiroshi;Kubota, Kohei;Sota, Teiji
为了揭示日本不同地区无飞行昆虫物种的系统地理模式差异，我们利用线粒体细胞色素氧化酶亚基I （COI）基因序列，研究了日本本州岛和北海道两大岛寒温带生境中Silpha甲虫的系统地理和人口统计学历史。本州有更多的山地地形，寒温带栖息地断断续续地出现，而位于本州北部的北海道则有更多连续的寒温带栖息地。长角蝉是本州特有的一种，分布在本州，而穿孔蝉分布在北海道和东亚大陆。结果表明，长角蝉的祖先约在0.7万年前通过西南路线进入本州，在本州孤立的山区具有高度分化的种群，而穿孔蝉的祖先在不到9万年前通过北部路线进入北海道，地理种群分化较小。在末次冰期，孔雀鸟可能局限于北海道南部的避难地，后来扩展到北海道北部，而长角蝉种群则存在于许多孤立的避难地，这可能与本州复杂的地形有关。因此，我们的研究表明，即使在密切相关的物种之间，生物学、纬度气候梯度和地形之间的相互作用也会产生不同的系统地理模式。(C) 2009 .林奈生物学报，林奈生物学报，2009,38(4):452-467。
To reveal differences in phylogeographic patterns of flightless insect species occurring in different regions of Japan, we studied the phylogeography and demographic history of Silpha beetles occurring in cool-temperate habitats of two major islands, Honshu and Hokkaido, using sequences of the mitochondrial cytochrome oxidase subunit I (COI) gene. Honshu has a more mountainous topography, and cool-temperate habitats occur discontinuously, whereas Hokkaido, located to the north of Honshu, has more continuous cool-temperate habitats. A species endemic to Honshu, S. longicornis occurs on Honshu, whereas S. perforata occurs on Hokkaido and the East Asian continent. Our results indicate that the ancestors of S. longicornis colonized Honshu via a south-west route c. 0.7 Mya and the species has highly divergent populations in isolated mountainous areas of Honshu, whereas S. perforata colonized Hokkaido via a northern route less than 90 000 years ago and has less divergent geographic populations. During the last glacial period, S. perforata was probably restricted to refugia in southern Hokkaido and later expanded into northern Hokkaido, whereas S. longicornis populations existed in many isolated refugia, probably because of the complex topography of Honshu. Thus, our study demonstrates that, even between closely related species, interactions among biology, latitudinal climatic gradients and topography can produce different phylogeographic patterns. (C) 2009 The Linnean Society of London, Biological Journal of the Linnean Society, 2009, 98, 452-467.