Scale Demographic Processes Resulting from Multiple Overseas
Journal of Biogeography (J. Biogeogr.) (2016) ORIGINAL Fine-scale demographic processes ARTICLE resulting from multiple overseas colonization events of the Japanese stream tree frog, Buergeria japonica Shohei Komaki1,2, Si-Min Lin3, Masafumi Nozawa4,5, Shohei Oumi6, Masayuki Sumida7 and Takeshi Igawa1* 1Division of Developmental Science, Graduate ABSTRACT School for International Development and Aim Amphibians are considered poor transoceanic dispersers because of their Cooperation, Hiroshima University, Higashi- permeable skin. However, overseas dispersal of amphibian species has been Hiroshima, Hiroshima 739-8529, Japan, 2Global Career Design Center, Hiroshima revealed by recent phylogeographical studies and the role of overseas coloniza- University, Higashi-Hiroshima, Hiroshima tion of amphibians on their evolution and diversification has also been high- 739-8514, Japan, 3Department of Life Science, lighted. However, no studies have investigated in detail the demographic National Taiwan Normal University, Taipei processes related to these overseas colonization events. To clarify how amphib- 116, Taiwan, 4Department of Genetics, ians achieve overseas colonization, we estimated the demographic history of SOKENDAI, Mishima, Shizuoka 411-8540, the Japanese stream tree frog, Buergeria japonica, which is distributed on Japan, 5Center for Information Biology, Amami Island and four northern neighbouring islands of the Tokara Archipelago, National Institute of Genetics, Mishima, Japan. Shizuoka 411-8540, Japan, 6Section of Location South-western islands of Japan and Taiwan. Agriculture and Forest, Amami City Government, Amami, Kagoshima 894-0048, Methods We analysed the mitochondrial cytb gene and 20 microsatellite loci, Japan, 7Institute for Amphibian Biology, and constructed phylogenetic trees based on these data. We also performed Graduate School of Science, Hiroshima demographic analyses by applying approximate Bayesian computation (ABC) University, Higashi-Hiroshima, Hiroshima method and an isolation-with-migration model.
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