Biodiversité

Le Département du Morbihan a dévoilé son premier Schéma départemental des espaces naturels sensibles et de la biodiversité en 2012. Dix ans après, il a été révisé pour la période 2024-2035. Dans l’état des lieux du patrimoine naturel, on y trouve des espèces menacées. Quelles sont-elles ?

L’éclairage nocturne engendre une perte d’habitats naturels, une fragmentation accrue et une mortalité directe pour les espèces vivant la nuit. La démarche de Trame noire consiste à préserver et à remettre en bon état les continuités écologiques nocturnes, dans un contexte de pollution lumineuse en constante progression. Le guide "Trame noire - Méthodes d'élaboration et outils pour sa mise en œuvre" de la collection Comprendre pour agir de l’OFB vise à mobiliser autour ces enjeux.

Land free of direct anthropogenic disturbance is considered essential for achieving biodiversity conservation outcomes but is rapidly eroding. In response, many nations are increasing their protected area (PA) estates, but little consideration is given to the context of the surrounding landscape. This is despite the fact that structural connectivity between PAs is critical in a changing climate and mandated by international conservation targets. Using a high-resolution assessment of human pressure, we show that while ~40% of the terrestrial planet is intact, only 9.7% of Earth’s terrestrial protected network can be considered structurally connected. On average, 11% of each country or territory’s PA estate can be considered connected.

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