{"thcode":2,"term":{"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."},"uf":[],"bt":[{"code":843,"name":"organisms","parent":1174,"scope":"Living individuals that grow, reproduce, and die."},{"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":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."}],"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":76,"name":"bacteria","parent":843,"scope":"Single celled microorganisms, beneficial or pathogenic, without a nuclear membrane."},{"code":1366,"name":"periphyton","parent":1266,"scope":"A plant assemblage including microbial communities of algae and cyanobacteria living attached to submerged aquatic vegetation."},{"code":890,"name":"phycology","parent":127,"scope":"Branch of biology concerned with the study of algae."},{"code":940,"name":"protists","parent":843,"scope":"Unicellular eukaryotes (organisms possessing nucleated cells) with affinities to both plants and animals. Classed in the Protista or Potoctista kingdom, they include protozoans, foraminifera, radiolarians, fungi and some algae."}]}