{"thcode":2,"term":{"code":704,"name":"marine ecosystems","parent":54,"scope":"Biological communities composed of plants and animals living primarily in or on seawater."},"uf":[],"bt":[{"code":54,"name":"aquatic ecosystems","parent":319,"scope":"Communities of interdependent organisms living primarily in or on water."},{"code":319,"name":"ecosystems","parent":921,"scope":"The interacting populations of plants, animals, and  microorganisms occupying a certain area, and their relationship to the environment."},{"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":971,"name":"reef ecosystems","parent":704,"scope":"Biological communities formed by the skeletons of calcareous seawater organisms, usually corals."}],"rt":[{"code":53,"name":"aquatic biology","parent":650,"scope":"The scientific study of organisms living in or near water.  This term is to be used for the science of 'aquatic biology' and for  biological studies in fresh and brackish water. For marine biological studies, use 'marine biology'."},{"code":311,"name":"ecology","parent":650,"scope":"Study of the relations between living plants and animals and their environment."},{"code":702,"name":"marine biology","parent":650,"scope":"Branch of biology concerned with the organisms and habitats of the seas and oceans."}]}