Biodiversity/biological diversity

is the variety and variability of life, including the diversity of genes within species, the diversity of species, the diversity of communities and ecosystems, and the diversity of ecological processes. [fn]Source: (USAID 2005) from "USAID Biodiversity Primer"[/fn]   The full range of natural variety and variability within and among living organisms, and the ecological and environmental complexes in which they occur. It encompasses multiple levels of organization, including genes, species, communities and ecosystems. [fn]Source: (TNC 2005) from website; The Nature Conservacy (updated: Aug 2005)[/fn]