{"thcode":2,"term":{"code":890,"name":"phycology","parent":127,"scope":"Branch of biology concerned with the study of algae."},"uf":[{"name":"algology","usewith":false}],"bt":[{"code":127,"name":"botany","parent":650,"scope":"The science of plants."},{"code":650,"name":"life sciences","parent":1019,"scope":"Branches of science that study living and fossil organisms."},{"code":1019,"name":"sciences","parent":1,"scope":"Major educational fields, fields of study, and professional groupings within USGS."},{"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":29,"name":"algae","parent":843,"scope":"Chlorophyll-bearing primarily aquatic nonvascular species that have no true roots, stems, or leaves; most algae are microscopic, but some species can be as large as vascular plants."},{"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":138,"name":"calcareous nannoplankton","parent":29,"scope":"Organisms of the kingdom Protista that normally produce coccoliths, microscopic structures of calcite (calcium carbonate), during some phase of their life cycle."},{"code":250,"name":"diatoms","parent":29,"scope":"Microscopic, single-celled plants of the class Bacillariophyceae that have siliceous shells called frustules, and which grow in both marine and fresh water."},{"code":261,"name":"dinoflagellates","parent":29,"scope":"Single-celled planktonic organisms, chiefly marine, characterized by twirling motion and whip-like flagella with affinities to both plants and animals."},{"code":647,"name":"lichens","parent":843,"scope":"Plants that are composed of a fungus and an alga growing together symbiotically and often found growing on rocks or tree trunks."},{"code":903,"name":"plankton","parent":841,"scope":"Floating aquatic plants (phytoplankton) and animals (zooplankton) which are often microscopic and drift with the current in lakes, rivers, and oceans."}]}