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Why some parasites are widespread and abundant while others are local and rare?

Author:
  • Marcos Robalinho Lima
  • Staffan Bensch
Publishing year: 2014
Language: English
Pages: 3130-3132
Publication/Series: Molecular Ecology
Volume: 23
Issue: 13
Document type: Journal article (comment)
Publisher: Wiley-Blackwell

Abstract english

Abundances and distributions of species are usually associated. This implies that as a species declines in abundance so does the number of sites it occupies. Conversely, when there is an increase in a species' range size, it is usually followed by an increase in population size (Gaston etal. ). This ecological phenomenon, also known as the abundance-occupancy relationship (AOR), is well documented in several species of animals and plants (Gaston etal. ) but has been little investigated in parasites. In this issue of Molecular Ecology, Drovetski etal. () investigated the AOR in avian haemosporidians (vector-borne blood parasites) using data from four well-sampled bird communities. In support of the AOR, the research group found that the abundance of parasite cytochrome b lineages (a commonly used proxy for species identification within this group of parasites) was positively linked with the abundance of susceptible avian host species and that the most abundant haemospordian lineages were those with larger ranges. Drovetski etal. () also found evidence for both hypotheses proposed to explain the AOR in parasites: the trade-off hypothesis (TOH) and the niche-breadth hypothesis (NBH). Interestingly, the main predictor of the AOR was the number of susceptible hosts (i.e. number of infected birds) and not the number of host species the parasites were able to exploit.

Keywords

  • Biological Sciences
  • Area-occupancy relationship
  • avian malaria
  • niche-breadth hypothesis
  • trade-off hypothesis

Other

Published
  • BECC
  • Malaria in birds
  • Molecular Ecology and Evolution Lab
  • ISSN: 0962-1083
Staffan Bensch
E-mail: staffan [dot] bensch [at] biol [dot] lu [dot] se

Professor

MEMEG

+46 46 222 42 92

E-C213

Sölvegatan 37, Lund

50

Head of unit

MEMEG

+46 46 222 42 92

E-C213

Sölvegatan 37, Lund

50

Research group

Molecular Ecology and Evolution Lab

Projects

Doctoral students and postdocs

PhD students, main supervisor

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