The Lessonia Nigrescens Species Complex (Laminariales, Phaeophyceae) Shows Strict Parapatry and Complete Reproductive Isolation in a Secondary Contact Zone1
J. Phycol. 47, 894–903 (2011) Ó 2011 Phycological Society of America DOI: 10.1111/j.1529-8817.2011.01019.x THE LESSONIA NIGRESCENS SPECIES COMPLEX (LAMINARIALES, PHAEOPHYCEAE) SHOWS STRICT PARAPATRY AND COMPLETE REPRODUCTIVE ISOLATION IN A SECONDARY CONTACT ZONE1 Florence Tellier Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biolo´gicas, ‘‘LIA DIAMS’’, Pontificia Universidad Cato´lica de Chile, Post-code 6513677, Santiago, Chile UPMC Univ. Paris VI, UMR 7144, Equipe ‘‘BEDIM’’, LIA ‘‘DIAMS’’, Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France Facultad de Ciencias del Mar, Universidad Cato´lica del Norte & CEAZA, Larrondo 1281, Coquimbo, Chile Javier Tapia, Sylvain Faugeron2 Center for Advanced Studies in Ecology and Biodiversity, Facultad de Ciencias Biolo´gicas, ‘‘LIA DIAMS’’, Pontificia Universidad Cato´lica de Chile, Post-code 6513677, Santiago, Chile Christophe Destombe and Myriam Valero UPMC Univ. Paris VI, UMR 7144, Equipe ‘‘BEDIM’’, LIA ‘‘DIAMS’’, Station Biologique de Roscoff, 29682 Roscoff, France CNRS, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29682 Roscoff, France During secondary contact between phylogeneti- zone can partially explain the lack of hybridization, cally closely related species (sibling species) having raising new interesting questions as to the mecha- diverged in allopatry, the maintenance of species nisms that limit sympatry at small spatial scales. integrity depends on intrinsic and extrinsic repro- Key index words: biological species concept; gene ductive barriers. In kelps (Phaeophyceae), the obser- flow; hybridization; kelp; microsatellite; parapa- vations of hybrids in laboratory conditions suggest try; reproductive isolation; secondary contact that reproductive isolation is incomplete.
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