title: Resource shifts in Malagasy dung beetles: contrasting processes revealed by dissimilar spatial genetic patterns.
abstract: The endemic dung beetle subtribe Helictopleurina has 65 species mostly in wet forests in eastern Madagascar. There are no extant native ungulates in Madagascar, but three Helictopleurus species have shifted to the introduced cattle dung in open habitats in the past 1500 years. Helictopleurus neoamplicollis and Helictopleurus marsyas exhibit very limited cytochrome oxidase subunit 1 haplotype diversity and a single haplotype is present across Madagascar, suggesting that these species shifted to cattle dung in a small region followed by rapid range expansion. In contrast, patterns of molecular diversity in Helictopleurus quadripunctatus indicate a gradual diet shift across most of southern Madagascar, consistent with somewhat broader diet in this species. The three cattle dung-using Helictopleurus species have significantly greater geographical ranges than the forest-dwelling species, apparently because the shift to the currently very abundant new resource relaxed interspecific competition that hinders range expansion in the forest species.
authors.affiliation: Department of Biological and Environmental Sciences, University of Helsinki, Viikinkaari 1, PO Box 65, FI-00014, Helsinki, FinlandDépartement d'Entomologie, Faculté des Sciences, Université d'Antananarivo, Antananarivo, B.P. 906, Madagascar.
authors.forename: Ilkka
authors.initials: I
authors.lastname: Hanski
authors.affiliation: Department of Biological and Environmental Sciences, University of Helsinki, Viikinkaari 1, PO Box 65, FI-00014, Helsinki, FinlandDépartement d'Entomologie, Faculté des Sciences, Université d'Antananarivo, Antananarivo, B.P. 906, Madagascar.
authors.forename: Helena
authors.initials: H
authors.lastname: Wirta
authors.affiliation: Department of Biological and Environmental Sciences, University of Helsinki, Viikinkaari 1, PO Box 65, FI-00014, Helsinki, FinlandDépartement d'Entomologie, Faculté des Sciences, Université d'Antananarivo, Antananarivo, B.P. 906, Madagascar.
authors.forename: Toshka
authors.initials: T
authors.lastname: Nyman
authors.affiliation: Department of Biological and Environmental Sciences, University of Helsinki, Viikinkaari 1, PO Box 65, FI-00014, Helsinki, FinlandDépartement d'Entomologie, Faculté des Sciences, Université d'Antananarivo, Antananarivo, B.P. 906, Madagascar.
authors.forename: Pierre
authors.initials: P
authors.lastname: Rahagalala
mesh_terms: D000818:Animals; D002417:Cattle; D001517:Coleoptera / Q000145:classification / Q000235:genetics / Q000502:physiology*; D003576:Electron Transport Complex IV / Q000235:genetics; D005243:Feces; D014644:Genetic Variation; D008270:Madagascar; D008969:Molecular Sequence Data
chemical_list: D003576:Electron Transport Complex IV
references.citation: Mol Ecol. 2006 Mar;15(3):681-94
references.pmid: 16499694
references.citation: J Hum Evol. 2004 Jul-Aug;47(1-2):25-63
references.pmid: 15288523
references.citation: Mol Ecol. 1998 Apr;7(4):453-64
references.pmid: 9628000
references.citation: Evolution. 1990 Sep;44(6):1648-1655
references.pmid: 28564317
references.citation: Evolution. 1993 Dec;47(6):1696-1710
references.pmid: 28567992
references.citation: Biol Lett. 2007 Jun 22;3(3):344-7
references.pmid: 17341451
references.citation: Proc Natl Acad Sci U S A. 2001 Apr 10;98(8):4558-62
references.pmid: 11287648
references.citation: Mol Biol Evol. 2007 Aug;24(8):1596-9
references.pmid: 17488738
references.citation: J Evol Biol. 2007 Sep;20(5):1720-9
references.pmid: 17714289
references.citation: Mol Ecol. 2000 Oct;9(10):1657-9
references.pmid: 11050560
references.citation: Mol Phylogenet Evol. 2008 Jun;47(3):1076-89
references.pmid: 18424187
references.citation: Evolution. 2008 Jun;62(6):1418-36
references.pmid: 18384659
references.citation: J Anim Ecol. 2007 May;76(3):415-23
references.pmid: 17439459
references.citation: Trends Parasitol. 2005 Oct;21(10):469-75
references.pmid: 16112615
references.citation: Clin Chem. 2004 Jul;50(7):1256-9
references.pmid: 15229160
references.citation: Cladistics. 2007 Apr;23(2):145-168
references.pmid: 34905849
references.citation: Nature. 2005 Jul 28;436(7050):546-9
references.pmid: 16049486
references.citation: Nature. 2000 Feb 24;403(6772):853-8
references.pmid: 10706275
references.citation: Nucleic Acids Res. 1994 Nov 11;22(22):4673-80
references.pmid: 7984417
references.citation: Evolution. 1996 Apr;50(2):777-786
references.pmid: 28568947