The interaction between warming and enrichment accelerates food-web simplification in freshwater systems.
biochemical oxygen demand
connectance
fish
lake
maximum trophic level
stream
trophic interaction
Journal
Ecology letters
ISSN: 1461-0248
Titre abrégé: Ecol Lett
Pays: England
ID NLM: 101121949
Informations de publication
Date de publication:
Aug 2024
Aug 2024
Historique:
revised:
25
06
2024
received:
13
11
2023
accepted:
26
06
2024
medline:
3
8
2024
pubmed:
3
8
2024
entrez:
3
8
2024
Statut:
ppublish
Résumé
Nutrient enrichment and climate warming threaten freshwater systems. Metabolic theory and the paradox of enrichment predict that both stressors independently can lead to simpler food-webs having fewer nodes, shorter food-chains and lower connectance, but cancel each other's effects when simultaneously present. Yet, these theoretical predictions remain untested in complex natural systems. We inferred the food-web structure of 256 lakes and 373 streams from standardized fish community samplings in France. Contrary to theoretical predictions, we found that warming shortens fish food-chain length and that this effect was magnified in enriched streams and lakes. Additionally, lakes experiencing enrichment exhibit lower connectance in their fish food-webs. Our study suggests that warming and enrichment interact to magnify food-web simplification in nature, raising further concerns about the fate of freshwater systems as climate change effects will dramatically increase in the coming decades.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e14480Subventions
Organisme : Centre for Ecology and Hydrology
ID : NE/T003502/1
Organisme : Agence Nationale de la Recherche
ID : ANR-17-CE32-0002
Organisme : Agence Nationale de la Recherche
ID : ANR-19-CE02-0001
Organisme : OFB-INRAE-USMB Pole ECLA
Informations de copyright
© 2024 The Author(s). Ecology Letters published by John Wiley & Sons Ltd.
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