Biodiversity A-Z (UNEP)

A glossary of definitions for terms relating to biodiversity, ecosystems services and conservation via UNEP-WCMC.

All definitions are referenced, where possible preference has been given to internationally recognised definitions (for example those defined by international conventions or agreements). The terms have been chosen to support understanding of biodiversity and conservation issues, and terms relating to biodiversity loss are complemented by those relating to conservation responses supported by international conservation organisations, governments, scientists and business sectors.

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