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Temperature-size responses alter food chain persistence across environmental gradients

A. Sentis, A. Binzer, DS. Boukal,

. 2017 ; 20 (7) : 852-862. [pub] 20170524

Jazyk angličtina Země Velká Británie

Typ dokumentu dopisy

Perzistentní odkaz   https://www.medvik.cz/link/bmc18016587

Body-size reduction is a ubiquitous response to global warming alongside changes in species phenology and distributions. However, ecological consequences of temperature-size (TS) responses for community persistence under environmental change remain largely unexplored. Here, we investigated the interactive effects of warming, enrichment, community size structure and TS responses on a three-species food chain using a temperature-dependent model with empirical parameterisation. We found that TS responses often increase community persistence, mainly by modifying consumer-resource size ratios and thereby altering interaction strengths and energetic efficiencies. However, the sign and magnitude of these effects vary with warming and enrichment levels, TS responses of constituent species, and community size structure. We predict that the consequences of TS responses are stronger in aquatic than in terrestrial ecosystems, especially when species show different TS responses. We conclude that considering the links between phenotypic plasticity, environmental drivers and species interactions is crucial to better predict global change impacts on ecosystem diversity and stability.

Citace poskytuje Crossref.org

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$a Sentis, Arnaud $u Department of Ecosystem Biology, Faculty of Science, University of South Bohemia, Branišovská 31, 370 05, České Budějovice, Czech Republic. Biology Centre AS CR, vvi, Institute of Entomology, Branišovská 31, 370 05, České Budějovice, Czech Republic. Unité Mixte de Recherche 5174 "Evolution et Diversité Biologique", Centre National de la Recherche Scientifique - Université de Toulouse III - Ecole Nationale Supérieure de Formation de l'Enseignement Agricole - Institut de Recherche pour le Développement, 31062, Toulouse, France.
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$a Body-size reduction is a ubiquitous response to global warming alongside changes in species phenology and distributions. However, ecological consequences of temperature-size (TS) responses for community persistence under environmental change remain largely unexplored. Here, we investigated the interactive effects of warming, enrichment, community size structure and TS responses on a three-species food chain using a temperature-dependent model with empirical parameterisation. We found that TS responses often increase community persistence, mainly by modifying consumer-resource size ratios and thereby altering interaction strengths and energetic efficiencies. However, the sign and magnitude of these effects vary with warming and enrichment levels, TS responses of constituent species, and community size structure. We predict that the consequences of TS responses are stronger in aquatic than in terrestrial ecosystems, especially when species show different TS responses. We conclude that considering the links between phenotypic plasticity, environmental drivers and species interactions is crucial to better predict global change impacts on ecosystem diversity and stability.
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