2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/21/2019 | 11:45 AM - 12:00 PM | INTRASPECIFIC VARIABILITY AND THE EFFECT OF AN INVASIVE SPECIES ON THE PHENOLOGY OF ECOSYSTEM FUNCTIONING | 251 DE

INTRASPECIFIC VARIABILITY AND THE EFFECT OF AN INVASIVE SPECIES ON THE PHENOLOGY OF ECOSYSTEM FUNCTIONING

Biological invasions are a key component of global changes and, by creating new biotic interactions within invaded ecosystems, invasive species can induce strong changes on food web structure and ecosystem functioning. To date, however, our understanding of their effects on the phenology of ecosystem processes is limited as most investigations have focused on climate warming. Using a conjunction of field, experimental and modelling approaches and invasive crayfish as model organisms, we demonstrated that i) invasive species can have profound effect on the phenology of a key ecosystem function (namely organic matter decomposition) by accelerating the rate of carbon recycling and shortening the availability of organic detritus in ecosystems and that ii) phenotypic variability, irrespective of its natural and human-induced determinants, can strongly modulate the effects of invasive crayfish on leaf litter decomposition. These results highlight the role of invasive species on ecosystem phenology with their effects depending on individual phenotypes and not just on their abundance, and the need to understand how they interact with the phenological effects of climate warming.

Invasives
Functional Ecology
Disturbance

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Presenters/Authors

Julien Cucherousset (), CNRS, Toulouse University, Dept EDB, France, julien.cucherousset@univ-tlse3.fr;