Menu

Javascript is not activated in your browser. This website needs javascript activated to work properly.
You are here

Interactions between Predation and Resources Shape Zooplankton Population Dynamics.

Author:
  • Alice Nicolle
  • Lars-Anders Hansson
  • Jakob Brodersen
  • Anders Nilsson
  • Christer Brönmark
Publishing year: 2011
Language: English
Publication/Series: PLoS ONE
Volume: 6
Issue: 1
Document type: Journal article
Publisher: Public Library of Science

Abstract english

Identifying the relative importance of predation and resources in population dynamics has a long tradition in ecology, while interactions between them have been studied less intensively. In order to disentangle the effects of predation by juvenile fish, algal resource availability and their interactive effects on zooplankton population dynamics, we conducted an enclosure experiment where zooplankton were exposed to a gradient of predation of roach (Rutilus rutilus) at different algal concentrations. We show that zooplankton populations collapse under high predation pressure irrespective of resource availability, confirming that juvenile fish are able to severely reduce zooplankton prey when occurring in high densities. At lower predation pressure, however, the effect of predation depended on algal resource availability since high algal resource supply buffered against predation. Hence, we suggest that interactions between mass-hatching of fish, and the strong fluctuations in algal resources in spring have the potential to regulate zooplankton population dynamics. In a broader perspective, increasing spring temperatures due to global warming will most likely affect the timing of these processes and have consequences for the spring and summer zooplankton dynamics.

Keywords

  • Ecology

Other

Published
  • ISSN: 1932-6203
Christer Brönmark
E-mail: christer [dot] bronmark [at] biol [dot] lu [dot] se

Head of unit

Division aquatic ecology

+46 46 222 37 02

+46 73 081 55 48

E-C125

Sölvegatan 37, Lund

50

Professor

Aquatic Ecology

50

Professor

Division aquatic ecology

+46 46 222 37 02

+46 73 081 55 48

E-C125

Sölvegatan 37, Lund

50

Research group

Aquatic Ecology

Projects

Doctoral students and postdocs

PhD students, main supervisor

Jerker Vinterstare

PhD students, assistant supervisor

  • Nan Hu
  • Varpu Pärssinen
  • Yongcui Sha
  • Downloads & links

    Centre for Animal Movement Research (CAnMove)

    My ResearchGate page

    Slim and fat fsh