title: What can phylogeographic breaks in the livebearer Poeciliopsis turrubarensis tell about fish community boundaries in western Costa Rica?
abstract: This study asks if the geographic boundary delineating two fish communities in western Costa Rica is congruent with a phylogeographic break in a single widespread fish species Poeciliopsis turrubarensis (Poeciliidae) that spans this area. Such congruence would suggest that a common historical event (e.g. geological or climatic) could be responsible for both patterns. It was found that there was a shared break across a region in central Costa Rica suggesting a common cause may be responsible for both the abrupt shift in fish community composition and the genetic break in P. turrubarensis.
authors.affiliation: Evolutionary Ecology Laboratories, Department of Biology, Brigham Young University, Provo, UT 84602, USA. adlarson@ucdavis.edu
authors.forename: A D
authors.initials: AD
authors.lastname: Larson
authors.forename: P L
authors.initials: PL
authors.lastname: Scarborough
authors.forename: C L
authors.initials: CL
authors.lastname: Sayre
authors.forename: J B
authors.initials: JB
authors.lastname: Johnson
mesh_terms: D000818:Animals; D003364:Costa Rica; D003532:Cyprinodontiformes / Q000235:genetics / Q000502:physiology*; D051456:Gene Flow; D014644:Genetic Variation; D006702:Homing Behavior; D058974:Phylogeography; D011157:Population Dynamics; D012934:Social Isolation