| A | B |
| Genetic diversity | variety of genes in the gene pool within a particular population of a species. |
| Species diversity | number of species within particular geograpic area. |
| Community diversity | variety of community types within communities. |
| Landscape diversity | Variety of communities and relative size over wider geographic areas. |
| Species | group of organisms-plant, animal, or microbe-of single kind. |
| Introduced species | Species introduced into community by people for some enviornmental reason and is reproducing |
| Re-introduced species | re-introduced species to place where the species had historically lived |
| Native species | Species naturally occur in a community as a result of natural processes of dispersal and range expansion. |
| Exotic\Alien species | species that are not native to a particular community |
| Invasive species | species that quickly spread and compete with native species for essential resources necessary for survival and reprodution |
| Community | group of organisms of different species, each with own niche, inhabiting a common environment-interacting |
| Ecological Niche | Role or Job played by organism in bioligical community |
| Adaptation | ecological change in function that produces a better adjustment of organism of species to environment |