Definition:
Variété des organismes vivants, quel que soit leur milieu d’origine (terrestre, marin, autres écosystèmes aquatiques, notamment), et des complexes écologiques dont ils font partie. Cela inclut la diversité au sein de chaque espèce, entre espèces et celle des écosystèmes.
Source:
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Food and Agriculture Organization of the United Nations, AQUASTAT Web Site
Interim Secretariat of the Convention on Biological Biodiversity (ISCBD). 1994. Convention on biological diversity. Text and annexes (UNEP/CBD/94/1). Geneva: United Nations Environment Programme.