Genetic diversity within a population refers to the number of different alleles (the alternate forms of genes) of all genes and the frequency with which they appear.
Species diversity - definition
Species diversity refers to the variety of species within a region.
Ecological diversity - definition
Ecosystem diversity refers to the variety of ecosystems in a given place.
Importance of species diversity to ecosystem - definition
Ecologists believe that communities with more species tend to be more stable than those with less species.
Attributes of a stable community- 1. It shall not show too much of variations in the year-to-year productivity. 2. It must be either resistant or resilient to seasonal disturbances. 3. It must be resistant also to alien species. Feature of David Tilmans ecology experiments- 1. The plots with more species showed less year-to-year variation in the total biomass. 2. Plots with increased diversity showed higher productivity.