{"thcode":2,"term":{"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."},"uf":[{"name":"biological invasions","usewith":{"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."}},{"name":"flyways","usewith":{"code":96,"name":"biogeography","parent":921,"scope":"The study of the geographic distributions of plants and animals."}},{"name":"seasonal migration","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":40,"name":"animal behavior","parent":921,"scope":"The way animals act or react to conditions in the environment and to other organisms, including life patterns such as migration, hibernation, and nocturnal living."},{"code":96,"name":"biogeography","parent":921,"scope":"The study of the geographic distributions of plants and animals."},{"code":268,"name":"dispersal (organisms)","parent":310,"scope":"The dissemination or geographic spread of individuals of a plant or animal population."},{"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":744,"name":"migratory species","parent":841,"scope":"Species that have a pattern of moving from one geographical area to another, primarily according to the seasons, and usually traveling long distances along established routes."}]}