Biodiversity refers to the variety and variability of life forms within a given ecosystem, biome, or the entire Earth. It encompasses the diversity of species, genetic variation within species, and the range of ecosystems that house these organisms. The variability among living organisms from all sources including terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are a part. This includes variation in genetic, phenotypic, phylogenetic, and functional attributes, as well as changes in abundance and distribution over time and space within and among species, biological communities and ecosystems.
Biodiversity
