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Short-term thermal acclimation modulates predator functional response.

Arnaud Sentis1, Lukas Veselý2, Marek Let2

  • 1INRAE Aix Marseille University UMR RECOVER Aix-en-Provence France.

Ecology and Evolution
|February 28, 2022
PubMed
Summary
This summary is machine-generated.

Short-term temperature acclimation significantly alters predator-prey interactions. Phenotypic plasticity in functional responses, like search rate and handling time, can be as impactful as direct temperature effects, crucial for climate change adaptation.

Keywords:
acclimationfunctional responsemetabolic theorytemperature

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Area of Science:

  • Ecology
  • Evolutionary Biology
  • Climate Change Biology

Background:

  • Phenotypic plasticity in response to temperature influences biological rates and traits.
  • Plasticity plays a key role in species adaptation to climate change.
  • Limited information exists on how thermal plasticity affects trophic interactions.

Purpose of the Study:

  • Investigate how short-term thermal acclimation modulates predator functional responses.
  • Examine the effects of acclimation at 16°C and 24°C on predator-prey dynamics.
  • Understand the role of thermal plasticity in species interactions under changing climates.

Main Methods:

  • Experiment using marbled crayfish (predator) and water louse (prey).
  • Short-term thermal acclimation at two temperatures (16°C and 24°C).
  • Analysis of functional response parameters: search rate and handling time.

Main Results:

  • Functional response parameters differed significantly between acclimation temperatures.
  • Acclimation to 16°C increased handling time and search rate.
  • Acclimation to 24°C decreased handling time and search rate.
  • The magnitude and direction of effects depended on acclimation time, with reversals observed after 24h.
  • Acclimation effects were comparable in magnitude to direct kinetic effects of temperature.

Conclusions:

  • Short-term thermal acclimation significantly impacts predator functional responses.
  • Understanding thermal plasticity is essential for predicting species interactions under global warming.
  • Phenotypic plasticity is a critical factor in species' ability to adapt to climate change.