Aquatic Organisms by LeAnne Yenny. Benthic Macroinvertebrates Used as bioindicator organisms The presence or absence of these organisms in a stream can.
Mayflies Order: Ephemeroptera. Life Cycle Hemimetabolous (egg, naiad, adult) –Naiad: aquatic, gill-breathing nymph –Nymph: larva of an insect without.
