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, Hirohisa Suzuki Search for other works by this author on: Oxford Academic Masaki Takenaka Department of Biology, Faculty of Science, Shinshu University , Asahi 3-1-1, Matsumoto, Nagano 390-8621 , Japan Institute of Mountain Science, Shinshu University , Asahi 3-1-1, Matsumoto, Nagano 390-8621 , Japan Search for other works by this author on: Oxford Academic Koji Tojo Division of Mountain and Environmental Science, Interdisciplinary Graduate School of Science and Technology, Shinshu University , Asahi 3-1-1, Matsumoto, Nagano 390-8621 , Japan Department of Biology, Faculty of Science, Shinshu University , Asahi 3-1-1, Matsumoto, Nagano 390-8621 , Japan Institute of Mountain Science, Shinshu University , Asahi 3-1-1, Matsumoto, Nagano 390-8621 , Japan Corresponding author. Department of Biology, Faculty of Science, Shinshu University, Asahi 3-1-1, Matsumoto, Nagano 390-8621, Japan. E-mail: ktojo@shinshu-u.ac.jp Search for other works by this author on: Oxford Academic
Biological Journal of the Linnean Society, Volume 141, Issue 4, April 2024, Pages 503–519, https://doi.org/10.1093/biolinnean/blad112
Published:
06 November 2023
Article history
Received:
06 March 2023
Revision received:
07 July 2023
Accepted:
04 August 2023
Published:
06 November 2023
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Hirohisa Suzuki, Masaki Takenaka, Koji Tojo, Phylogeography of an insect inhabiting ‘Sky Islands’: the relationships among genetic structures and geographical characteristics, geohistorical characteristics, and cyclical climate changes, Biological Journal of the Linnean Society, Volume 141, Issue 4, April 2024, Pages 503–519, https://doi.org/10.1093/biolinnean/blad112
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Abstract
When gene flow has been restricted between populations, the genetic structure of such species often reflects geohistory and climate changes. Populations of species inhabiting high-altitude regions, known as ‘Sky Islands’, are isolated and exhibit restricted gene flow, so they often have habitat-specific genetic structures that correspond to their surrounding geographical structures. Here we focus on a limnephilid caddisfly, Rivulophilus sakaii, which inhabits the alpine zone of Japan. Phylogenetic analyses were conducted based on the mtDNA COI and 16S rRNA regions, and the nDNA 18S rRNA, 28S rRNA, CAD, EF1-α, and POL-II regions; the results indicated three phylogeographically differentiated intraspecific lineages. Haplotype network and demographic analyses based on the mtDNA COI region suggested the size of the respective isolated populations has stabilized. This suggests that mountain formation in the Japanese Archipelago due to volcanic activity has resulted in barriers to migration and dispersal between high-altitude aquatic insect populations. This was inferred to be an effect of Quaternary climate changes that caused vertical distributional shifts following mountain formation, resulting in repeated connection and fragmentation of the populations. This is important supporting information with regard to discussing the effects and functions of geohistory and climatic changes on the phylogenetic evolution of organisms presently inhabiting interglacial ‘Sky Islands’.
alpine zone, aquatic insects, biogeography, caddisfly, headwater, microrefugia, molecular phylogeny, mountain ecology, Pleistocene, vicariance
© The Author(s) 2023. Published by Oxford University Press on behalf of The Linnean Society of London. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com
This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/pages/standard-publication-reuse-rights)
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