{"thcode":2,"term":{"code":807,"name":"nutrient cycling","parent":93,"scope":"The exchange of elements or compounds essential for the nourishment of organisms in an ecosystem."},"uf":[{"name":"nutrient balance","usewith":false}],"bt":[{"code":93,"name":"biogeochemical cycling","parent":310,"scope":"The cycling of chemical constituents through a biological system."},{"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":[{"code":407,"name":"food web","parent":807,"scope":"The complex intertwining of the interrelated food chains in an ecosystem."}],"rt":[{"code":89,"name":"biochemistry","parent":650,"scope":"Study of chemical processes that occur within or are mediated by living organisms."},{"code":311,"name":"ecology","parent":650,"scope":"Study of the relations between living plants and animals and their environment."},{"code":806,"name":"nutrient content (water)","parent":1304,"scope":"Contaminants in water that nourish organisms, especially plants. Includes nitrogen and phosphorus, either of which can lead to the harmful growth of algae and other plants when present to excess in a body of water."}]}