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Citation for Study 1472

About Citation title: "Evolution and phylogeography of Halimeda section Halimeda".
About This study was previously identified under the legacy study ID S1416 (Status: Published).

Citation

Verbruggen H., Clerck O., Schils T., Kooistra W., & Coppejans E. 2005. Evolution and phylogeography of Halimeda section Halimeda. Molecular Phylogenetics and Evolution, 37: 789-803.

Authors

  • Verbruggen H.
  • Clerck O.
  • Schils T.
  • Kooistra W.
  • Coppejans E.

Abstract

Nuclear ribosomal and plastid DNA sequences of specimens belonging to section Halimeda of the pantropical green seaweed genus Halimeda show that the group under scrutiny contains many more genetically delineable species than those recognized by classical taxonomy. Discordances between phylograms inferred from nuclear and plastid DNA sequences suggest that reticulate evolution has been involved in speciation within the clade. Nonetheless, our data do not allow ruling out certain alternative explanations for the discordances. Several pseudo-cryptic species are restricted to the margins of the generic distribution range. In a clade of H. cuneata sibling species from widely separated subtropical localities in the Indian Ocean, the South African sibling branches off first, leaving the Arabian and West Australian species as closest relatives. We hypothesize that geographic isolation of the siblings may have taken place following Pleistocene or Pliocene periods of climatic cooling during which subtropical species occupied larger distribution ranges. A more basal separation of Atlantic, Indo-Pacific, and Mediterranean species indicates vicariance. The alternative events that could have caused this vicariance are discussed.

About this resource

  • Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S1472
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