CiteULike CiteULike
Delicious Delicious
Connotea Connotea

Citation for Study 10222

About Citation title: "The Casiquiare River acts as a dispersal corridor between the Amazonas and Orinoco River basins: Biogeographic analysis of the genus Cichla.".
About This study was previously identified under the legacy study ID S2578 (Status: Published).

Citation

Willis S., Nunes M., Monta?a C., Farias I., & Lovejoy N. 2010. The Casiquiare River acts as a dispersal corridor between the Amazonas and Orinoco River basins: Biogeographic analysis of the genus Cichla. Molecular Ecology, .

Authors

  • Willis S.
  • Nunes M.
  • Monta?a C.
  • Farias I.
  • Lovejoy N.

Abstract

The Casiquiare River is a unique biogeographic corridor between the Orinoco and Amazonas basins. We investigated the importance of this connection for Neotropical fishes using peacock cichlids (Cichla spp.) as a model system. We tested whether the Casiquiare provides a conduit for gene flow between contemporary populations, and investigated the origin of biogeographic distributions that span the Casiquiare. Using sequences from the mitochondrial control region of three focal species (C. temensis, C. monoculus, and C. orinocensis) whose distributions include the Amazonas, Orinoco, and Casiquiare, we constructed maximum likelihood phylograms of haplotypes and analyzed the populations under an isolation-with-migration coalescent model. Our analyses suggest that populations of all three species have experienced some degree of gene flow via the Casiquiare. We also generated a mitochondrial genealogy of all Cichla species using >2000 bp and performed a dispersal-vicariance analysis (DIVA) to reconstruct the historical biogeography of the genus. This analysis, when combined with the intraspecific results, supports two instances of dispersal from the Amazonas to the Orinoco. Thus, our results support the idea that the Casiquiare connection is important across temporal scales, facilitating both gene flow and the dispersal and range expansion of species.

About this resource

  • Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S10222
  • Other versions: Download Reconstructed NEXUS File Nexus Download NeXML File NeXML
  • Show BibTeX reference
  • Show RIS reference