2007 Fiscal Year Final Research Report Summary
Molecular phylogeography and systematics of terrestrial invertebrates of Ryukyu islands
| Project/Area Number |
16370042
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
UESHIMA Rei The University of Tokyo -> 東京大学, Graduate school of science -> 大学院・理学系・研究科, Associate professor -> 准教授 (20241771)
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| Co-Investigator(Kenkyū-buntansha) |
TSURUSAKI Nobuo The University of Tokyo, Faculty of Regional Sciences, Tottori University Professor (00183872)
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| Project Period (FY) |
2004 – 2007
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| Keywords | biogeography / systematics / molecular phylogeny / species diversity / conservation |
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| Research Abstract |
Ryukyu islands, an archipelago comprised of more than 100 islands between Kyusyu and Taiwan, show the highest species diversity in Japan. Terrestrial fauna of Ryukyu islands is characterized by a high level of endemism. Repeated land-bridge formation and fluctuation of sea-level during the Pliocene and Pleistocene must have enhanced the diversification of endemic fauna in Ryukyu islands. In this study, I examined molecular phylogeographic patterns of various terrestrial invertebrates focusing on land snails. Results of the molecular phylogenetic analyses demonstrated the occurrence of many cryptic species : Land snail species which was regarded as a widely distributed species in the current taxonomy are actually shown to be a complex comprised of 8-11 distinct species endemic to a narrow area. Most of these cryptic species are highly endemic and some are only known from a few localities. They are endangered species and special attention for the conservation is urgently needed. Molecular phylogeographies of 10 different families of land snails and insects are not necessarily concordant with paleogeography of Ryukyu islands. Many taxa endemic to an island, including newly discovered cryptic species, are shown to be relict species derived from ancestors with wide distribution. Further, the result of the study support an over sea dispersal and recent artificial introduction in some land snail populations. Evolutionary histories of terrestrial invertebrates in Ryukyu islands are complex and the pattern of diversification and dispersal differ among taxonomic lineages.
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Research Products
(44 results)
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[Journal Article] A discovery of Acytolepis puspa(Lepidoptera, Lycaenidae)in the Kanto district, Japan : a geographic range extension, dispersal pathway inferred from ecology, morphology and molecular analyses(In Japanse)2009
Author(s)
Yago, M., Nakahara, S., Abe, W., Isohata, Y., Tomokuni, M., Ueshima, R.
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Journal Title
Transactions of the Lepidopterological Society of Japan 60(1)
Pages: 9-24
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Molecular systematics and biogeography of the genus Zizina(Lepidoptera : Lycaenidae)(In Japanese)2008
Author(s)
Yago, M., Hirai, N., Kondo, M., Tanikawa, T., Ishii, T., Wang, M., Williams, M., Ueshima, R.
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Journal Title
Zootaxa 1746
Pages: 15-38
Description
「研究成果報告書概要(欧文)」より
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[Presentation] シルビアシジミ属の分類と系統生物地理2007
Author(s)
矢後勝也, 平井規央, 近藤真理子, 谷川哲朗, 石井実, 王敏, Mark Williams, 上島励
Organizer
日本鱗翅学会第54回大会
Place of Presentation
新潟
Year and Date
20071027-20071028
Description
「研究成果報告書概要(和文)」より
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