Food nutrient availability affects epibiont prevalence and richness in natural Daphnia populations. (28th May 2020)

• Record Type: Journal Article
• Authors: Reyserhove, Lien; Bulteel, Lore; Liu, Jing; Souffreau, Caroline; Brans, Kristien I.; Engelen, Jessie M.T.; De Meester, Luc; Hendrickx, Frederik; Muylaert, Koenraad; Declerck, Steven A. J.; Decaestecker, Ellen
• Is Part Of: Limnology and oceanography. Volume 65:Number 10(2020)
• Page Start: 2529
• Page End: 2540
• Publication Date: 2020-05-28
• Subjects: Limnology -- Periodicals; Oceanography -- Periodicals; Océanographie; Limnologie; Limnology; Oceanography; Computer network resources; Périodique électronique (Descripteur de forme); Ressource Internet (Descripteur de forme); Periodicals; 551.4805
• DOI: 10.1002/lno.11469
• Languages: English
• ISSNs: 0024-3590

Abstract

Abstract: The increased input of nutrients into biological systems has been shown to result in altered biotic interactions through changes in food availability. The aim of this study was to test for an association between phytoplankton nutrient content and epibiont variables in natural zooplankton populations. Via a field survey, we studied how a gradient in food quantity and quality impacted host population density and epibiont variables in Daphnia pulex . We found a significant decrease in epibiont prevalence and infracommunity richness, which could mainly be attributed to a changing phytoplankton N : P ratio (caused by P‐limitation). We performed a lab experiment in which we exposed Daphnia magna to different algal nutrient ratios and the epibionts detected in the field study. P‐limitation in the algae affected D. magna performance and resulted in similar trends of food quality effects in the epibiont variables. The experiment, however, also reflected subtle differences between different epibiont species.