Water volume differentially modifies copepod predatory strengths on two prey types

Ross N. Cuthbert*, Rotondwa Sithagu, Olaf L.F. Weyl, Ryan J. Wasserman, Jaimie T.A. Dick, Amanda Callaghan, P. William Froneman, Stefan Foord, Tatenda Dalu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Predatory interaction strengths are highly context-dependent, and in temporary aquatic ecosystems, may be affected by water volume changes. We examine the influence of water volume on Lovenula raynerae (Copepoda) functional responses towards two temporary pond prey types. Daphnia prey risk was not affected by increasing water volume, whereas for Culex prey risk was reduced. Accordingly, water volume changes through the hydroperiod may have species-specific effects on prey, with implications for population persistence under environmental change.

Original languageEnglish
Article number125747
JournalLimnologica
Volume81
Early online date10 Jan 2020
DOIs
Publication statusPublished - Mar 2020

Bibliographical note

Funding Information:
This study was funded by the Department for the Economy, Northern Ireland . We thank Choice Maluleke and Consol Kubayi for assisting with fieldwork and experiments. We extend gratitude to Rhodes University for the provision of laboratory facilities. We acknowledge use of infrastructure and equipment provided by the South African Institute for Aquatic Biodiversity (SAIAB) Research Platform and the funding channelled through the National Research Foundation – SAIAB Institutional Support system . This study was partly funded by the National Research Foundation – South African Research Chairs Initiative of the Department of Science and Technology (Inland Fisheries and Freshwater Ecology , Grant No. 110507 ) and National Research Foundation Thuthuka Grant (No. 117700 ).

Publisher Copyright:
© 2020 Elsevier GmbH

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

Keywords

  • Copepod
  • Culicid
  • Daphnid
  • Functional response
  • Interaction strength
  • Search area

ASJC Scopus subject areas

  • Aquatic Science

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