(1) The total variability within and among species of living organisms and the ecological complexes that they inhabit. Biodiversity has three levels – ecosystem, species, and genetic diversity – reflected in the number of different species, the different combination of species, and the different combinations of genes within each species. (2) The totality of genes, species, and ecosystems in a region or the world. [Source: USDA National Plant Materials Manual]

« Back to Glossary Index
Comments Off on Biodiversity