{"thcode":2,"term":{"code":92,"name":"biodiversity","parent":921,"scope":"The variety in form, genetics, and ecological roles of organisms within a specific geographic area."},"uf":[{"name":"biological diversity","usewith":false},{"name":"diversity (biological)","usewith":false}],"bt":[{"code":921,"name":"population and community ecology","parent":1174,"scope":"Interactions of a single species (population) or an association of different species (community) occupying a particular region, including their biotic and abiotic environments."},{"code":1174,"name":"topics","parent":1,"scope":"Themes, subjects, and concerns for which USGS information resources are relevant."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[{"code":314,"name":"ecosystem diversity","parent":92,"scope":"Measure of the variety of biological communities and habitats important for ecological stability."},{"code":432,"name":"genetic diversity","parent":92,"scope":"Measure of the variety of genes within a population pool in a given area."},{"code":1089,"name":"species diversity","parent":92,"scope":"An ecological concept incorporating both the number of species in a particular sampling area and the evenness with which individuals are distributed among the various species."}],"rt":[{"code":96,"name":"biogeography","parent":921,"scope":"The study of the geographic distributions of plants and animals."},{"code":308,"name":"ecological competition","parent":310,"scope":"The struggle between members of two or more species for scarce environmental resources."},{"code":311,"name":"ecology","parent":650,"scope":"Study of the relations between living plants and animals and their environment."},{"code":332,"name":"endangered species","parent":841,"scope":"Any species that is in danger of extinction throughout all or a significant portion of its range."},{"code":333,"name":"endemic species","parent":768,"scope":"Plant and animals species native to and confined to specific geographic areas."},{"code":602,"name":"invasive species","parent":797,"scope":"Plant, animal, or microbe species that is non-native (or alien) to the ecosystem under consideration and whose introduction causes or is likely to cause economic or environmental harm, or harm to human health."},{"code":650,"name":"life sciences","parent":1019,"scope":"Branches of science that study living and fossil organisms."},{"code":768,"name":"native species","parent":841,"scope":"Organisms originating in the area where they live."},{"code":797,"name":"nonindigenous species","parent":841,"scope":"Organisms accidentally or intentionally introduced into areas where they did not previously originate or live."}]}