<descriptor thcode="62"><thesaurus thcode="62" name="Coastal and Marine Ecological Classification Standard" scope="Categories of ecosystems for coastal, estuarine, and marine environments." creator="FGDC" rights="public domain" date="2017-05-10" codetype="alpha" prefix="cmecs" uri="https://www2.usgs.gov/science/CMECS" tblname="cmecs" root_code="root" contact="pschweitzer"><category><term thcode="25" code="16" name="hierarchical" parent="11" scope="Substantive broader-narrower relationships exist among the terms."/><term thcode="25" code="16" name="hierarchical" parent="11" scope="Substantive broader-narrower relationships exist among the terms."/></category><altlabel><altlabel>CMECS</altlabel><altlabel>CMECS</altlabel><altlabel>Coastal and Marine Ecological Classification Standard (CMECS)</altlabel><altlabel>Coastal and Marine Ecological Classification Standard (CMECS)</altlabel></altlabel></thesaurus><term thcode="62" code="BC-398" name="Crustacean Holoplankton" parent="BC-385" scope="Biotic Subclass: Water parcels in which crustacean holoplankton are the perceived dominant feature. Crustaceans constitute the vast bulk of zooplankton in many areas of the ocean."/><bt><term thcode="62" code="BC-385" name="Zooplankton" parent="BC-384" scope="Biotic Group: Water parcels or layers in which zooplankton are perceived to be the dominant feature. ..."/><term thcode="62" code="BC-384" name="Planktonic Biota" parent="BC-C002" scope="Biotic Setting: Planktonic Biota includes biota that drift, float, or remain suspended in the water column in aggregations that are big enough to be (a) detected by the human eye (or with mild magnification) or (b) sampled with a fine-plankton net. ..."/><term thcode="62" code="BC-C002" name="Biotic" parent="root"/><term thcode="62" code="root" name="CMECS" scope="Coastal and Marine Ecological Classification Standard: Category terms encompassing waters from the head of tide or inland incursion of ocean salinity to the splash zone of the coasts to the deepest portions of the oceans and the deep waters of the Great Lakes."/></bt><nt><term thcode="62" code="BC-439" name="Amphipod Aggregation" parent="BC-398" scope="Biotic Group: Water parcels in which amphipods (laterally compressed or stick-like, elongated, generally small crustaceans) aggregate and are the dominant form of zooplankton."/><term thcode="62" code="BC-440" name="Copepod Aggregation" parent="BC-398" scope="Biotic Group: Water parcels in which copepods aggregate and are the dominant form of zooplankton. ..."/><term thcode="62" code="BC-441" name="Krill Aggregation" parent="BC-398" scope="Biotic Group: Water parcels in which shrimp-like krill constitute the dominant form of zooplankton. ..."/></nt></descriptor>