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Title: Phylogenetic test of speciation by host shift in leaf cone moths (Caloptilia) feeding on maples (Acer)
Authors: Nakadai, Ryosuke
Kawakita, Atsushi  kyouindb  KAKEN_id
Author's alias: 川北, 篤
Keywords: Diversification
Herbivorous insect
Host plant
Host shift
Issue Date: 21-Jun-2016
Publisher: John Wiley and Sons Ltd
Journal title: Ecology and Evolution
Volume: 6
Issue: 14
Start page: 4958
End page: 4970
Abstract: The traditional explanation for the exceptional diversity of herbivorous insects emphasizes host shift as the major driver of speciation. However, phylogenetic studies have often demonstrated widespread host plant conservatism by insect herbivores, calling into question the prevalence of speciation by host shift to distantly related plants. A limitation of previous phylogenetic studies is that host plants were defined at the family or genus level; thus, it was unclear whether host shifts predominate at a finer taxonomic scale. The lack of a statistical approach to test the hypothesis of host-shift-driven speciation also hindered studies at the species level. Here, we analyze the radiation of leaf cone moths (Caloptilia) associated with maples (Acer) using a newly developed, phylogeny-based method that tests the role of host shift in speciation. This method has the advantage of not requiring complete taxon sampling from an entire radiation. Based on 254 host plant records for 14 Caloptilia species collected at 73 sites in Japan, we show that major dietary changes are more concentrated toward the root of the phylogeny, with host shift playing a minor role in recent speciation. We suggest that there may be other roles for host shift in promoting herbivorous insect diversification rather than facilitating speciation per se.
Rights: © 2016 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
DOI(Published Version): 10.1002/ece3.2266
PubMed ID: 27547326
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