title: Phylogeographic patterns of decapod crustaceans at the Atlantic-Mediterranean transition.
abstract: Comparative multispecies studies allow contrasting the effect of past and present oceanographic processes on phylogeographic patterns. In the present study, a fragment of the COI gene was analyzed in seven decapod crustacean species from five families and with different bathymetric distributions. A total of 769 individuals were sampled along the Atlantic-Mediterranean transition area in order to test the effect of three putative barriers to gene flow: Strait of Gibraltar, Almeria-Oran Front and Ibiza Channel. A significant effect of the Strait of Gibraltar was found in the crabs Liocarcinus depurator and Macropipus tuberculatus. The Ibiza Channel had a significant effect for L. depurator. However, the Almeria-Oran front was not found to have a significant effect on any of the studied species. Higher levels of population structure were found in shallow-water species, although the number of species sampled should be increased to obtain a conclusive pattern. The haplotypes within the different species coalesced at times that could be related with past climatic events occurring before, during and after the last glacial maximum. Given the large diversity of phylogeographic patterns obtained within decapods, it is concluded that both historical and contemporary processes (marine current patterns, bathymetry and life-history traits) shape the phylogeographic patterns of these crustaceans.
authors.affiliation: Departament de Genètica, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal 645, 08028 Barcelona, Spain. victorhugogarcia@ub.edu
authors.forename: Víctor Hugo
authors.initials: VH
authors.lastname: García-Merchán
authors.forename: Aymée
authors.initials: A
authors.lastname: Robainas-Barcia
authors.forename: Pere
authors.initials: P
authors.lastname: Abelló
authors.forename: Enrique
authors.initials: E
authors.lastname: Macpherson
authors.forename: Ferran
authors.initials: F
authors.lastname: Palero
authors.forename: Mariano
authors.initials: M
authors.lastname: García-Rodríguez
authors.forename: Luis
authors.initials: L
authors.lastname: Gil de Sola
authors.forename: Marta
authors.initials: M
authors.lastname: Pascual
mesh_terms: D000818:Animals; D001267:Atlantic Ocean; D004272:DNA, Mitochondrial / Q000235:genetics*; D033364:Decapoda / Q000145:classification / Q000235:genetics*; D003576:Electron Transport Complex IV / Q000235:genetics*; D051456:Gene Flow; D049810:Genetic Speciation; D014644:Genetic Variation; D006239:Haplotypes; D008522:Mediterranean Sea; D010802:Phylogeny; D058974:Phylogeography; D017422:Sequence Analysis, DNA
chemical_list: D004272:DNA, Mitochondrial; D003576:Electron Transport Complex IV