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Related Experiment Video

Updated: Jan 21, 2026

Laboratory Estimation of Net Trophic Transfer Efficiencies of PCB Congeners to Lake Trout Salvelinus namaycush from Its Prey

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Spatial insurance in multi-trophic metacommunities.

Romana Limberger^1,2, Alexandra Pitt², Martin W Hahn¹

¹Research Department for Limnology, University of Innsbruck, Mondsee, Austria.

Ecology Letters

|August 9, 2019

Summary

This summary is machine-generated.

Dispersal can buffer environmental changes for some aquatic organisms, but its effects vary by trophic group. This spatial insurance mechanism differs for bacteria, phytoplankton, and zooplankton facing acidification.

Keywords:

Bacteria dispersal environmental change experiment food web mesocosms metacommunity phytoplankton trophic interactions zooplankton

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Area of Science:

Ecology
Environmental Science
Aquatic Ecology

Background:

Metacommunity theory highlights dispersal's role in maintaining diversity and ecosystem function under environmental change.
The impact of dispersal on mitigating environmental change effects may differ across trophic levels, altering food web dynamics.

Discussion:

Dispersal mitigated acidification's negative impact on phytoplankton diversity but not on zooplankton or bacteria diversity.
Dispersal accelerated phytoplankton compositional changes under acidification, suggesting altered trophic interactions.

Key Insights:

The effectiveness of dispersal as a 'spatial insurance' varies significantly among different aquatic trophic groups.
Acidification and dispersal interact to influence community composition, with differential effects across bacteria, phytoplankton, and zooplankton.

Outlook:

Further research should explore the specific mechanisms driving differential responses to dispersal and acidification.
Understanding these variations is crucial for predicting ecosystem resilience in the face of global environmental change.