Biodiversité

La COP14 Biodiversité de l’ONU s’achève avec la volonté des 196 Etats Parties d’intensifier les efforts d’ici à 2020 et de lancer une large mobilisation pour l’adoption d’un nouveau cadre d’action mondial à la COP15 en 2020. Lors de cette conférence, l’UICN a dévoilé les 39 sites naturels figurant sur sa Liste verte des aires protégées, dont 15 nouvelles candidatures, récompensant l’efficacité de leur gestion. Les espaces protégés français sont les plus nombreux sur cette liste mondiale, avec 10 lauréats...

Tropical coral reefs are subject to multiple pressures from both natural and anthropogenic sources. These pressures have caused widespread declines in reef health, resulting in the increased use of spatial management tools such as marine protected areas (MPAs). MPAs have proven generally effective if well designed and enforced, but there are limited long-term studies investigating how the presence of small-scale MPAs affects fish populations and reef communities. Using a 12-year time series, we found that small-scale (10–50 ha) community-managed MPAs along the Danajon Bank of the Philippines preserved average fish biomass within their boundaries over time relative to surrounding fished reefs. Unprotected areas are, however, showing significant long-term biomass decline. MPAs were also found to preserve more key trophic groups and larger-bodied commercially targeted reef fish families.