title: Mutualistic interactions drive ecological niche convergence in a diverse butterfly community.
abstract: Ecological communities are structured in part by evolutionary interactions among their members. A number of recent studies incorporating phylogenetics into community ecology have upheld the paradigm that competition drives ecological divergence among species of the same guild. However, the role of other interspecific interactions, in particular positive interactions such as mutualism, remains poorly explored. We characterized the ecological niche and inferred phylogenetic relationships among members of a diverse community of neotropical Müllerian mimetic butterflies. Müllerian mimicry is one of the best studied examples of mutualism, in which unpalatable species converge in wing pattern locally to advertize their toxicity to predators. We provide evidence that mutualistic interactions can drive convergence along multiple ecological axes, outweighing both phylogeny and competition in shaping community structure. Our findings imply that ecological communities are adaptively assembled to a much greater degree than commonly suspected. In addition, our results show that phenotype and ecology are strongly linked and support the idea that mimicry can cause ecological speciation through multiple cascading effects on species' biology.
authors.affiliation: Institute of Evolutionary Biology, University of Edinburgh, Edinburgh, United Kingdom, 2 Department of Zoology, University of Cambridge, Cambridge, UK. melias2008@gmail.com
authors.forename: Marianne
authors.initials: M
authors.lastname: Elias
authors.forename: Zachariah
authors.initials: Z
authors.lastname: Gompert
authors.forename: Chris
authors.initials: C
authors.lastname: Jiggins
authors.forename: Keith
authors.initials: K
authors.lastname: Willmott
mesh_terms: D000220:Adaptation, Biological / Q000502:physiology*; D000818:Animals; D005075:Biological Evolution; D002080:Butterflies / Q000145:classification / Q000235:genetics*; D004463:Ecology; D017753:Ecosystem; D004484:Ecuador; D004777:Environment; D049810:Genetic Speciation; D010802:Phylogeny