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Oecologia

pp 1–11 | Cite as

Consumer adaptation mediates top–down regulation across a productivity gradient

  • Michael F. Chislock
  • Orlando Sarnelle
  • Lauren M. Jernigan
  • Vernon R. Anderson
  • Ash Abebe
  • Alan E. WilsonEmail author
Community ecology – original research
  • 38 Downloads

Abstract

Humans have artificially enhanced the productivity of terrestrial and aquatic ecosystems on a global scale by increasing nutrient loading. While the consequences of eutrophication are well known (e.g., harmful algal blooms and toxic cyanobacteria), most studies tend to examine short-term responses relative to the time scales of heritable adaptive change. Thus, the potential role of adaptation by organisms in stabilizing the response of ecological systems to such perturbations is largely unknown. We tested the hypothesis that adaptation by a generalist consumer (Daphnia pulicaria) to toxic prey (cyanobacteria) mediates the response of plankton communities to nutrient enrichment. Overall, the strength of Daphnia’s top–down effect on primary producer biomass increased with productivity. However, these effects were contingent on prey traits (e.g., rare vs. common toxic cyanobacteria) and consumer genotype (i.e., tolerant vs sensitive to toxic cyanobacteria). Tolerant Daphnia strongly suppressed toxic cyanobacteria in nutrient-rich ponds, but sensitive Daphnia did not. In contrast, both tolerant and sensitive Daphnia genotypes had comparable effects on producer biomass when toxic cyanobacteria were absent. Our results demonstrate that organismal adaptation is critical for understanding and predicting ecosystem-level consequences of anthropogenic environmental perturbations.

Keywords

Eutrophication Nutrient enrichment Toxic cyanobacteria Microcystin Management Harmful algal blooms (HABs) Nitrogen Phosphorus Bottom–up Consumer offense Evolution 

Notes

Acknowledgements

We thank Randall Goodman, Mark Peterman, and the staff of the Auburn University E.W. Shell Fisheries Research Center for logistical support. Steve Cason provided assistance in the lab. Dennis DeVries, Sharon Hermann, Rusty Wright, Volker Rudolf, Bri Reed, Andy Turner, Alan Tessier, Doug Levey, Sam Scheiner, Jon Chase, Jason Hoverman, and Mike Vanni provided helpful comments on the manuscript. This study was supported by an EPA STAR Graduate Fellowship, NSF Grants DEB-0841864, DEB-0841944, and DBI-0965272, and the Alabama Agricultural Experiment Station, and the Hatch program of the National Institute of Food and Agriculture, U.S. Department of Agriculture.

Author contribution statement

MFC, OS, and AEW conceived and designed the experiments. MFC, LMJ, VRA, and AEW performed the experiments. MFC, OS, AA, and AEW analyzed the data. MFC, OS, AA, and AEW wrote the manuscript; other authors provided editorial advice.

Supplementary material

442_2019_4401_MOESM1_ESM.docx (734 kb)
Supplementary material 1 (DOCX 733 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Fisheries, Aquaculture, and Aquatic Sciences, 203 Swingle HallAuburn UniversityAuburnUSA
  2. 2.Department of Environmental Science and Ecology, The College at BrockportState University of New YorkBrockportUSA
  3. 3.Department of Fisheries and WildlifeMichigan State UniversityEast LansingUSA
  4. 4.Department of Mathematics and StatisticsAuburn UniversityAuburnUSA

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