Global correlates of terrestrial and marine coverage by protected areas on islands

David Mouillot (1) , Laure Velez (1) , Eva Maire (2) , Alizée Masson (1) , Christina Hicks (2) , James Moloney (3) , Marc Troussellier (4)

1 UM - Université de Montpellier
2 Lancaster Environment Centre
3 College of Science & Engineering, James Cook University, Smithfield, Qld, Australia
4 CNRS-L - National Council for Scientific Research = Conseil national de la recherche scientifique du Liban [Lebanon]

Many islands are biodiversity hotspots but also extinction epicenters. In addition to strong cultural connections to nature, islanders derive a significant part of their economy and broader wellbeing from this biodiversity. Islands are thus considered as the socio-ecosystems most vulnerable to species and habitat loss. Yet, the extent and key correlates of protected area coverage on islands is still unknown. Here we assess the relative influence of climate, geography, habitat diversity, culture, resource capacity, and human footprint on terrestrial and marine protected area coverage across 2323 inhabited islands globally. We show that, on average, 22% of terrestrial and 13% of marine island areas are under protection status, but that half of all islands have no protected areas. Climate, diversity of languages, human population density and development are strongly associated with differences observed in protected area coverage among islands. Our study suggests that economic development and population growth may critically limit the amount of protection on islands.

Domaines: Biodiversité et Ecologie

David Mouillot, Laure Velez, Eva Maire, Alizée Masson, Christina Hicks, et al.. Global correlates of terrestrial and marine coverage by protected areas on islands. Nature Communications, 2020, 11 (1), ⟨10.1038/s41467-020-18293-z⟩. ⟨hal-02993050⟩