2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/22/2019 | 9:30 AM - 9:45 AM | EFFECTS OF A DIVERSE SET OF PARASITES ON NUTRIENT RECYCLING BY THEIR HOSTS | 253 AB
EFFECTS OF A DIVERSE SET OF PARASITES ON NUTRIENT RECYCLING BY THEIR HOSTS
Consumer driven nutrient recycling provides an important flux of inorganic nutrients to primary producers. Parasites are consumers themselves, and can alter nutrient recycling by their consumer hosts. Previous work on the effects of parasites on host nutrient recycling suggest that parasitized hosts excrete nitrogen at greater rates, and that their excretion stoichiometry has a higher N:P than uninfected hosts. We tested the hypothesis that these are general traits of parasitized consumers by measuring the effects of parasites on their host’s excretion rates in four pairs of aquatic host-parasite interactions (baetid-mermithid, heptageniid-mermithid, heptageniid-dipteran, & perlodid-hydrachnidian).
Parasite effects on host excretion rates were highly variable and specific to individual host-pathogen pairs. Only the perlodid stonefly showed a parasite-induced change in excretion stoichiometry. The two mayflies parasitized by the mermithid showed parasite-induced changes in N and P excretion rates, but in opposite directions. The dipteran parasite showed no effect on host excretion rates. Stoichiometric mismatch between host and parasite did not predict parasite effects on host excretion. We hypothesize that changes in host metabolism in response to parasitism likely complicate the relationship between host and parasite stoichiometry and consumer driven nutrient recycling.
- Nutrients
- Nitrogen
- Phosphorous
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Presenters/Authors
Andrew Sanders
(), North Carolina State University Dept. of Applied Ecology; Rocky Mountain Biological Laboratory, ajsande5@ncsu.edu;
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Brad Taylor
(), North Carolina State University Dept. of Applied Ecology; Rocky Mountain Biological Laboratory, bwtaylo3@ncsu.edu ;
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Kara Cromwell
(), University of Wisconsin-Madison, kara.cromwell@gmail.com;
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