{"thcode":2,"term":{"code":359,"name":"eutrophication","parent":310,"scope":"The process by which water becomes enriched with plant nutrients, most commonly phosphorus and nitrogen."},"uf":[],"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":657,"name":"limnology","parent":291,"scope":"Scientific study of the physical and biological characteristics of inland bodies of water such as lakes and ponds."},{"code":854,"name":"oxygen content (water)","parent":1304,"scope":"Measurement of the concentration of oxygen dissolved in water, which is an important indicator of the condition of a water body."}]}