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Updated: Jun 17, 2025

Resurrection of Dormant Daphnia magna: Protocol and Applications

Resurrection of Dormant Daphnia magna: Protocol and Applications

Published on: January 19, 2018

Multi-decadal warming alters predator's effect on prey community composition.

Jingyao Niu¹, Magnus Huss¹, Aurélie Garnier^1,2

¹Department of Aquatic Resources, Swedish University of Agricultural Sciences, Box 7018 , Uppsala 75007, Sweden.

Proceedings. Biological Sciences

|August 7, 2024

Summary

Warming-evolved fish predators impact prey communities differently than unevolved fish. These predator microevolutionary changes can alter food web dynamics across generations.

Keywords:

Eurasian perch climate warming local adaptation thermal evolution trophic interaction

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Area of Science:

Ecology
Evolutionary Biology
Climate Change Research

Background:

Predator responses to warming influence prey communities through plasticity or evolution.
Evidence is limited on how warming-induced predator evolution affects food webs.

Purpose of the Study:

Investigate if multi-generational warming exposure in wild fish alters their top-down effects on prey.
Compare impacts of fish from heated vs. reference environments on zooplankton communities.

Main Methods:

Common garden mesocosm experiment using larval perch (Perca fluviatilis).
Fish larvae originated from heated or reference coastal environments.
Zooplankton communities were fed to fish across a gradient of experimental temperatures.

Main Results:

Fish from heated environments maintained higher zooplankton abundance, unaffected by experimental warming.
Zooplankton abundance declined with experimental temperature when preyed upon by fish from reference environments.
Heated-origin fish larvae showed increased consumption of large zooplankton taxa with rising temperatures.

Conclusions:

Intergenerational thermal adaptation in predators can significantly alter prey community structure and abundance.
Microevolution in predators due to climate warming may have cascading, cross-generational effects on food webs.
Predator adaptive evolution can mediate the ecological consequences of climate change in aquatic ecosystems.