Food-web stability signals critical transitions in temperate shallow lakes

Jan J. Kuiper (), Cassandra van Altena, Peter C. de Ruiter, Luuk P. A. van Gerven, Jan H. Janse and Wolf M. Mooij
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Jan J. Kuiper: Netherlands Institute of Ecology
Cassandra van Altena: Biometris, Wageningen University
Peter C. de Ruiter: Biometris, Wageningen University
Luuk P. A. van Gerven: Netherlands Institute of Ecology
Jan H. Janse: Netherlands Institute of Ecology
Wolf M. Mooij: Netherlands Institute of Ecology

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract A principal aim of ecologists is to identify critical levels of environmental change beyond which ecosystems undergo radical shifts in their functioning. Both food-web theory and alternative stable states theory provide fundamental clues to mechanisms conferring stability to natural systems. Yet, it is unclear how the concept of food-web stability is associated with the resilience of ecosystems susceptible to regime change. Here, we use a combination of food web and ecosystem modelling to show that impending catastrophic shifts in shallow lakes are preceded by a destabilizing reorganization of interaction strengths in the aquatic food web. Analysis of the intricate web of trophic interactions reveals that only few key interactions, involving zooplankton, diatoms and detritus, dictate the deterioration of food-web stability. Our study exposes a tight link between food-web dynamics and the dynamics of the whole ecosystem, implying that trophic organization may serve as an empirical indicator of ecosystem resilience.

Date: 2015
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DOI: 10.1038/ncomms8727

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