Per capita interactions and stress tolerance drive stress-induced changes in biodiversity effects on ecosystem functions

Jan M. Baert, Colin R. Janssen, Koen Sabbe, Frédérik De Laender

Résultats de recherche: Contribution à un journal/une revueArticle

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Résumé

Environmental stress changes the relationship between biodiversity and ecosystem functions, but the underlying mechanisms are poorly understood. Because species interactions shape biodiversity–ecosystem functioning relationships, changes in per capita interactions under stress (as predicted by the stress gradient hypothesis) can be an important driver of stress-induced changes in these relationships. To test this hypothesis, we measure productivity in microalgae communities along a diversity and herbicide gradient. On the basis of additive partitioning and a mechanistic community model, we demonstrate that changes in per capita interactions do not explain effects of herbicide stress on the biodiversity–productivity relationship. Instead, assuming that the per capita interactions remain unaffected by stress, causing species densities to only change through differences in stress tolerance, suffices to predict the stress-induced changes in the biodiversity–productivity relationship and community composition. We discuss how our findings set the stage for developing theory on how environmental stress changes biodiversity effects on ecosystem functions.
langue originaleAnglais
Numéro d'article12486
journalNature Communications
Numéro de publication7
Les DOIs
étatPublié - 18 août 2016

Empreinte digitale

biological diversity
Biodiversity
ecosystems
Herbicides
Ecosystems
Ecosystem
Microalgae
interactions
herbicides
gradients
productivity
Productivity
Chemical analysis

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title = "Per capita interactions and stress tolerance drive stress-induced changes in biodiversity effects on ecosystem functions",
abstract = "Environmental stress changes the relationship between biodiversity and ecosystem functions, but the underlying mechanisms are poorly understood. Because species interactions shape biodiversity–ecosystem functioning relationships, changes in per capita interactions under stress (as predicted by the stress gradient hypothesis) can be an important driver of stress-induced changes in these relationships. To test this hypothesis, we measure productivity in microalgae communities along a diversity and herbicide gradient. On the basis of additive partitioning and a mechanistic community model, we demonstrate that changes in per capita interactions do not explain effects of herbicide stress on the biodiversity–productivity relationship. Instead, assuming that the per capita interactions remain unaffected by stress, causing species densities to only change through differences in stress tolerance, suffices to predict the stress-induced changes in the biodiversity–productivity relationship and community composition. We discuss how our findings set the stage for developing theory on how environmental stress changes biodiversity effects on ecosystem functions.",
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Per capita interactions and stress tolerance drive stress-induced changes in biodiversity effects on ecosystem functions. / Baert, Jan M.; Janssen, Colin R.; Sabbe, Koen; De Laender, Frédérik.

Dans: Nature Communications, Numéro 7, 12486, 18.08.2016.

Résultats de recherche: Contribution à un journal/une revueArticle

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AU - Baert, Jan M.

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AU - De Laender, Frédérik

PY - 2016/8/18

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