{"thcode":2,"term":{"code":268,"name":"dispersal (organisms)","parent":310,"scope":"The dissemination or geographic spread of individuals of a plant or animal population."},"uf":[{"name":"colonization (organisms)","usewith":false}],"bt":[{"code":310,"name":"ecological processes","parent":101,"scope":"Dynamic biogeochemical interactions that occur among and between biotic and abiotic components of the biosphere."},{"code":101,"name":"biological and physical processes","parent":1174,"scope":"All continuing activities, functions, and phenomena associated with organisms and non-living matter."},{"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":[],"rt":[{"code":311,"name":"ecology","parent":650,"scope":"Study of the relations between living plants and animals and their environment."},{"code":650,"name":"life sciences","parent":1019,"scope":"Branches of science that study living and fossil organisms."},{"code":743,"name":"migration (organisms)","parent":310,"scope":"The movement of animals, often periodical, from one area to another due to seasonal changes, availability of food, or climatic conditions."}]}