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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Human impacts on global freshwater fish biodiversity (2021)
Auteurs :	Guohuan Su, Auteur ; Maxime Logez, Auteur ; Jun Xu, Auteur ; Shengli Tao, Auteur ; Sébastien Villéger, Auteur ; Sébastien Brosse, Auteur
Type de document :	Article
Dans :	Science (371(6531) February, 2021)
Article en page(s) :	835-838
Langues:	Anglais
Mots-clés :	Biodiversité ; cours d'eau ; Pisces ; Habitat ; Fragmentation habitats ; Dégradation environnement
Résumé :	We are increasingly aware of human impacts on biodiversity across our planet, especially in terrestrial and marine systems. We know less about fresh waters, including large rivers. Su et al. looked across such systems globally, focusing on several key measures of fish biodiversity. They found that half of all river systems have been heavily affected by human activities, with only very large tropical river basins receiving the lowest levels of change. Fragmentation and non-native species have also led to the homogenization of rivers, with many now containing similar species and fewer specialized lineages. Freshwater fish represent one-fourth of the world’s vertebrates and provide irreplaceable goods and services but are increasingly affected by human activities. A new index, Cumulative Change in Biodiversity Facets, revealed marked changes in biodiversity in >50% of the world’s rivers covering >40% of the world’s continental surface and >37% of the world’s river length, whereas
En ligne :	https://science.sciencemag.org/content/371/6531/835

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