Large-herbivore nemabiomes: patterns of parasite diversity and sharing

Georgia C. Titcomb, Johan Pansu, Matthew C. Hutchinson, Kaia J. Tombak, Christina B. Hansen, Christopher C.M. Baker, Tyler R. Kartzinel, Hillary S. Young, Robert M. Pringle

Research output: Contribution to journalArticlepeer-review

Abstract

Amidst global shifts in the distribution and abundance of wildlife and livestock, we have only a rudimentary understanding of ungulate parasite communities and parasite-sharing patterns. We used qPCR and DNA metabarcoding of fecal samples to characterize gastrointestinal nematode (Strongylida) community composition and sharing among 17 sympatric species of wild and domestic large mammalian herbivore in central Kenya. We tested a suite of hypothesis-driven predictions about the role of host traits and phylogenetic relatedness in describing parasite infections. Host species identity explained 27-53% of individual variation in parasite prevalence, richness, community composition and phylogenetic diversity. Host and parasite phylogenies were congruent, host gut morphology predicted parasite community composition and prevalence, and hosts with low evolutionary distinctiveness were centrally positioned in the parasite-sharing network. We found no evidence that host body size, social-group size or feeding height were correlated with parasite composition. Our results highlight the interwoven evolutionary and ecological histories of large herbivores and their gastrointestinal nematodes and suggest that host identity, phylogeny and gut architecture - a phylogenetically conserved trait related to parasite habitat - are the overriding influences on parasite communities. These findings have implications for wildlife management and conservation as wild herbivores are increasingly replaced by livestock.

Original languageEnglish (US)
Article number20212702
JournalProceedings of the Royal Society B: Biological Sciences
Volume289
Issue number1974
DOIs
StatePublished - 2022

All Science Journal Classification (ASJC) codes

  • Immunology and Microbiology(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Environmental Science(all)
  • Agricultural and Biological Sciences(all)

Keywords

  • cophylogeny
  • ecological network analysis
  • generalism and specialism
  • multiparasitism
  • phylosymbiosis
  • wildlife-livestock interface

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