Trophic downgrading decreases species asynchrony and community stability regardless of climate warming.
climate change
community stability
microbial food web
predator loss
species asynchrony
tank-bromeliad
trophic cascades
Journal
Ecology letters
ISSN: 1461-0248
Titre abrégé: Ecol Lett
Pays: England
ID NLM: 101121949
Informations de publication
Date de publication:
Dec 2021
Dec 2021
Historique:
revised:
26
08
2021
received:
10
03
2021
accepted:
30
08
2021
pubmed:
20
9
2021
medline:
16
11
2021
entrez:
19
9
2021
Statut:
ppublish
Résumé
Theory and some evidence suggest that biodiversity promotes stability. However, evidence of how trophic interactions and environmental changes modulate this relationship in multitrophic communities is lacking. Given the current scenario of biodiversity loss and climate changes, where top predators are disproportionately more affected, filling these knowledge gaps is crucial. We simulated climate warming and top predator loss in natural microcosms to investigate their direct and indirect effects on temporal stability of microbial communities and the role of underlying stabilising mechanisms. Community stability was insensitive to warming, but indirectly decreased due to top predator loss via increased mesopredator abundance and consequent reduction of species asynchrony and species stability. The magnitude of destabilising effects differed among trophic levels, being disproportionally higher at lower trophic levels (e.g. producers). Our study unravels major patterns and causal mechanisms by which trophic downgrading destabilises large food webs, regardless of climate warming scenarios.
Types de publication
Letter
Langues
eng
Sous-ensembles de citation
IM
Pagination
2660-2673Informations de copyright
© 2021 John Wiley & Sons Ltd.
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