Biodiversité

Establishing large networks of fully protected marine protected areas (MPAs) is challenging because of displacement costs for fisheries. The use of partially protected areas is often proposed as an alternative. However, how conservation and fisheries outcomes of MPA networks are mediated through time by the level of protection remains uncertain. Here we use a metapopulation model of a commercially exploited demersal coastal fish to assess conservation and fisheries outcomes of alternative management policies. We compare the temporal performances of nonspatial management, large MPAs, or networks of MPAs in an overfished case study.

A ‘Blueprint’ to save critical ecosystems and stabilize the Earth’s climate.

More than two years in development, the Global Safety Net is the first comprehensive global-scale analysis of terrestrial areas essential for biodiversity and climate resilience, totaling 50.4% of the Earth's land. The report was published in Science Advances and highlights the importance of protecting and restoring the natural world to address three converging crises -- climate change, the loss of biodiversity, and the emergence of novel viruses such as COVID-19.

Au sommaire notamment :

- Effectiveness of biodiversity‐conservation marketing. Jillian Ryan

 - Incorporating connectivity into conservation planning for optimal representation of multiple species and ecosystem services. Sara H. Williams et al.

- Environmental solutions sparked by environmental history Dominic McAfee

- Effects of crowding due to habitat loss on species assemblage patterns

Area-based conservation, including protected areas and OECMs, is the primary approach used to address biodiversity decline and now covers 8% of the world’s oceans and 17% of its lands. As it is set to diversify and expand under the 30x30 target to protect30% of the planet by 2030, we take stock of the approach, including its history in global policy and performance. We outline three priority directions to ensure area-based
conservation contributes to securing a sustainable and just future.

Le « filet de sécurité mondial » décrit comment une conservation étendue de la nature répond à ces deux menaces globales. Les auteurs identifient 50% du domaine terrestre qui, s’il était conservé, inverserait la tendance future à la perte de biodiversité, empêcherait les émissions de CO2 dues au changement d’usage des terres et renforcerait le […]