Environmental DNA metabarcoding reveals and unpacks a biodiversity conservation paradox in Mediterranean marine reserves - Université de Perpignan Via Domitia Access content directly
Journal Articles Proceedings of the Royal Society B: Biological Sciences Year : 2021

Environmental DNA metabarcoding reveals and unpacks a biodiversity conservation paradox in Mediterranean marine reserves

Abstract

Although we are currently experiencing worldwide biodiversity loss, local species richness does not always decline under anthropogenic pressure. This conservation paradox may also apply in protected areas but has not yet received conclusive evidence in marine ecosystems. Here, we survey fish assemblages in six Mediterranean no-take reserves and their adjacent fishing grounds using environmental DNA (eDNA) while controlling for environmental conditions. We detect less fish species in marine reserves than in nearby fished areas. The paradoxical gradient in species richness is accompanied by a marked change in fish species composition under different managements. This dissimilarity is mainly driven by species that are often overlooked by classical visual surveys but detected with eDNA: cryptobenthic, pelagic, and rare fishes. These results do not negate the importance of reserves in protecting biodiversity but shed new light on how under-represented species groups can positively react to fishing pressure and how conservation efforts can shape regional biodiversity patterns.
Fichier principal
Vignette du fichier
83492.pdf (944.24 Ko) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

hal-04015973 , version 1 (15-12-2023)

Identifiers

Cite

Emilie Boulanger, Nicolas Loiseau, Alice Valentini, Véronique Arnal, Pierre Boissery, et al.. Environmental DNA metabarcoding reveals and unpacks a biodiversity conservation paradox in Mediterranean marine reserves. Proceedings of the Royal Society B: Biological Sciences, 2021, 288 (1949), pp.20210112. ⟨10.1098/rspb.2021.0112⟩. ⟨hal-04015973⟩
16 View
1 Download

Altmetric

Share

Gmail Facebook X LinkedIn More