Allometric and trait-based patterns in parasite stoichiometry

Rachel Paseka, Rita L. Grunberg

Research output: Contribution to journalArticle

Abstract

We measured the elemental content (%C, N and P) and ratios (C:N, C:P, N:P) of a diverse assemblage of parasitic helminths to ask whether taxonomy or traits were related to stoichiometric variation among species. We sampled 27 macroparasite taxa, spanning four phyla, infecting vertebrate and invertebrate hosts from freshwater ecosystems in New Jersey. Macroparasites varied widely in elemental content, exhibiting 4.7-fold variation in %N, 4.6-fold variation in %P, and 11.5-fold variation in N:P. Across all species, parasite %P scaled negatively and C:P scaled positively with body size. Similar relationships between parasite P content and body size occurred at the phylum level and within individual species. The allometric scaling of P across species supports the growth rate hypothesis, which predicts that smaller taxa require more P to support relatively higher growth rates. Life cycle stage was related to %N and C:N, with non-reproductive parasite stages lower in %N and higher in C:N than actively reproducing parasites. Parasite phylum, functional feeding group, and trophic level did not explain elemental variation among species. Organismal stoichiometry is linked to ecological function, and wide variation in macroparasite stoichiometry likely generates diverse patterns in host–parasite nutrient dynamics and variable relationships between parasitism and nutrient cycling.

LanguageEnglish (US)
Pages102-112
Number of pages11
JournalOikos
Volume128
Issue number1
DOIs
StatePublished - Jan 1 2019

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stoichiometry
parasite
parasites
fold
body size
nutrient dynamics
ecological function
freshwater ecosystem
nutrient cycling
parasitism
helminths
trophic level
biogeochemical cycles
vertebrate
life cycle
invertebrate
invertebrates
vertebrates
developmental stages
taxonomy

Keywords

  • body size
  • ecological stoichiometry
  • growth rate hypothesis
  • nitrogen
  • parasitism
  • phosphorus

Cite this

Allometric and trait-based patterns in parasite stoichiometry. / Paseka, Rachel; Grunberg, Rita L.

In: Oikos, Vol. 128, No. 1, 01.01.2019, p. 102-112.

Research output: Contribution to journalArticle

Paseka, Rachel ; Grunberg, Rita L. / Allometric and trait-based patterns in parasite stoichiometry. In: Oikos. 2019 ; Vol. 128, No. 1. pp. 102-112.
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