{"thcode":2,"term":{"code":922,"name":"population dynamics","parent":921,"scope":"Changes in the size, composition, or structure of aggregates of single or multiple species in a specific area over time."},"uf":[],"bt":[{"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":[],"rt":[{"code":30,"name":"algal blooms","parent":310,"scope":"Exceptional growth of algae and cyanobacteria in lakes, rivers or oceans due to excessive nutrients or climatic conditions."},{"code":96,"name":"biogeography","parent":921,"scope":"The study of the geographic distributions of plants and animals."},{"code":311,"name":"ecology","parent":650,"scope":"Study of the relations between living plants and animals and their environment."}]}