KOPS - The Institutional Repository of the University of Konstanz

Energetic mismatch induced by warming decreases leaf litter decomposition by aquatic detritivores

Energetic mismatch induced by warming decreases leaf litter decomposition by aquatic detritivores

Cite This

Files in this item

Files Size Format View

There are no files associated with this item.

RÉVEILLON, Tom, Thibaut ROTA, Éric CHAUVET, Antoine LECERF, Arnaud SENTIS, 2022. Energetic mismatch induced by warming decreases leaf litter decomposition by aquatic detritivores. In: The Journal of Animal Ecology. Wiley. 91(10), pp. 1975-1987. ISSN 0021-8790. eISSN 1365-2656. Available under: doi: 10.1111/1365-2656.13710

@article{Reveillon2022-10Energ-57435, title={Energetic mismatch induced by warming decreases leaf litter decomposition by aquatic detritivores}, year={2022}, doi={10.1111/1365-2656.13710}, number={10}, volume={91}, issn={0021-8790}, journal={The Journal of Animal Ecology}, pages={1975--1987}, author={Réveillon, Tom and Rota, Thibaut and Chauvet, Éric and Lecerf, Antoine and Sentis, Arnaud} }

terms-of-use Réveillon, Tom Energetic mismatch induced by warming decreases leaf litter decomposition by aquatic detritivores 2022-05-05T12:37:50Z Rota, Thibaut 1. The balance of energetic losses and gains is of paramount importance for understanding and predicting the persistence of populations and ecosystem processes in a rapidly changing world. Previous studies suggested that metabolic rate often increases faster with warming than resource ingestion rate, leading to an energetic mismatch at high temperature. However, little is known about the ecological consequences of this energetic mismatch for population demography and ecosystem functions.<br /><br />2. Here, we combined laboratory experiments and modeling to investigate the energetic balance of a stream detritivore (Gammarus fossarum) along a temperature gradient and the consequences for detritivore populations and organic matter decomposition.<br /><br />3. We experimentally measured the energetic losses (metabolic rate) and supplies (ingestion rate) of Gammarus and we modeled the impact of rising temperatures and changes in Gammarus body size induced by warming on population dynamics and benthic organic matter dynamics in freshwater systems.<br /><br />4. Our experimental results indicated an energetic mismatch in a Gammarus population where losses via metabolic rate increase faster than supplies via food ingestion with warming, which translated in a decrease of energetic efficiency with temperature rising from 5 to 20 °C. Moreover, our consumer-resource model predicts a decrease in the biomass of Gammarus population with warming, associated with lower maximum abundances and steeper abundance decreases after biomass annual peaks. These changes resulted in a decrease of leaf litter decomposition rate and thus longer persistence of leaf litter standing stock over years in the simulations. In addition, Gammarus body size reductions led to shorter persistence for both leaf litter and Gammarus biomasses at low temperature and the opposite trend at high temperature, revealing that body size reduction was weakening the effect of temperature on resource and consumer persistence.<br /><br />5. Our model contributes to identifying the mechanisms that explain how thermal effects at the level of individuals may cascade through trophic interactions and influence important ecosystem processes. Considering the balance of physiological processes is crucial to improve our ability to predict the impact of climate change on carbon stocks and ecosystem functions. Lecerf, Antoine Sentis, Arnaud Lecerf, Antoine Réveillon, Tom 2022-10 Rota, Thibaut Chauvet, Éric Chauvet, Éric 2022-05-05T12:37:50Z Sentis, Arnaud eng

This item appears in the following Collection(s)

Search KOPS


Browse

My Account