Article Dans Une Revue Proceedings of the Royal Society B: Biological Sciences Année : 2025

Functional diversity shapes the stability of reef fish biomass under global change

Camille Mellin

Résumé

Understanding how environmental and human pressures impact the temporal stability of fish community biomass on shallow reefs is essential for effective conservation and management. These pressures influence community stability directly, by affecting species’ stability and asynchrony in species’ fluctuations. However, their effects may also indirectly depend on the functional traits of the species composing the community, which remains poorly understood. Here, we examine both direct and indirect, trait-mediated effects of environmental variability and human impacts on species’ biomass stability and asynchrony in 215 Australian shallow reefs. These communities span a 10-degree sea surface temperature (SST) gradient and have been monitored over 14 years. Our results indicate higher asynchrony in tropical reefs owing to higher trait diversity and trait redundancy and higher species’ stability in colder, temperate communities owing to higher mean trophic level. Human impacts, through their negative effects on species’ stability and trait diversity, were the main destabilizing factor of fish community biomass. Temporal change in SST destabilized species’ biomass while increasing mean trophic level in fish communities. Overall, our findings show that a comprehensive analysis of the multiple facets of functional diversity is crucial to better understand and forecast the long-term stability of marine ecosystems under global change.

Fichier principal
Vignette du fichier
mahaut-et-al-functional-diversity-shapes-the-stability-of-reef-fish-biomass-under-global-change.pdf (1.26 Mo) Télécharger le fichier
main.pdf (1.25 Ko) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte
Licence
Origine Fichiers éditeurs autorisés sur une archive ouverte
Licence

Dates et versions

hal-05105667 , version 1 (02-07-2025)

Licence

Identifiants

Citer

Lucie Mahaut, Nicolas Loiseau, Sébastien Villéger, Arnaud Auber, Cyril Hautecoeur, et al.. Functional diversity shapes the stability of reef fish biomass under global change. Proceedings of the Royal Society B: Biological Sciences, 2025, 292 (2046), 20250252 (11p.). ⟨10.1098/rspb.2025.0252⟩. ⟨hal-05105667⟩
142 Consultations
114 Téléchargements

Altmetric

Partager

  • More