The distinctive features of agricultural biodiversity include the following: (a) Agricultural biodiversity is essential to satisfy basic human needs for food and livelihood security; (b) Agricultural biodiversity is managed by farmers; many components of agricultural biodiversity depend on this human influence; indigenous knowledge and culture are integral parts of the management of agricultural biodiversity; (c) There is a great interdependence between countries for the genetic resources for food and agriculture; (d) For crops and domestic animals, diversity within species is at least as important as diversity between species and has been greatly expanded through agriculture; (e) Because of the degree of human management of agricultural biodiversity, its conservation in production systems is inherently linked to sustainable use; (f) Nonetheless, much biological diversity is now conserved ex situ in gene banks or breeders' materials; (g) The interaction between the environment, genetic resources and management practices that occurs in situ within agro-ecosystems often contributes to maintaining a dynamic portfolio of agricultural biodiversity.