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Morphological versus molecular identification of avian Haemosporidia: an exploration of three species concepts

Published online by Cambridge University Press:  02 June 2006

E. S. MARTINSEN
Affiliation:
Department of Biology, University of Vermont, Burlington, Vermont 05405, USA
I. PAPERNA
Affiliation:
Department of Animal Sciences, Faculty of Agriculture, Food and Environmental Quality, The Hebrew University of Jerusalem, Rehovot, Israel
J. J. SCHALL
Affiliation:
Department of Biology, University of Vermont, Burlington, Vermont 05405, USA

Abstract

More than 200 species of avian Haemosporidia (genera Plasmodium, Haemoproteus, and Leucocytozoon) have been described based primarily on morphological characters seen in blood smears. Recent molecular studies, however, suggest that such methods may mask a substantial cryptic diversity of avian haemosporidians. We surveyed the haemosporidians of birds sampled at 1 site in Israel. Parasites were identified to species based on morphology, and a segment of the parasite's cytochrome b gene was sequenced. We compared 3 species concepts: morphological, genetic, and phylogenetic. Fifteen morphological species were present. Morphological species that occurred once within our dataset were associated with a unique gene sequence, displayed large genetic divergence from other morphological species, and were not contained within clades of morphological species that occurred more than once. With only 1 exception, morphological species that were identified from multiple bird hosts presented identical sequences for all infections, or differed by few synonymous substitutions, and were monophyletic for all phylogenetic analyses. Only the morphological species Haemoproteus belopolskyi did not follow this trend, falling instead into at least 2 genetically distant clades. Thus, except for H. belopolskyi, parasites identified to species by morphology were supported by both the genetic and phylogenetic species concepts.

Information

Type
Research Article
Copyright
2006 Cambridge University Press

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