Limnology

Acad acid Algae amount aquatic organisms aquatic plants bacteria basin benthic Biol biological Birge and Juday body bog lakes bottom deposits bottom fauna bottom materials Bull carbon dioxide cent changes chemical Cladocera color Crustacea decomposition density depth diatoms dissolved oxygen distribution Douglas Lake Ecology effect environment epilimnion eutrophic factors fishes fresh water fresh-water greater heat Hydrobiol hydrogen hydrogen-ion concentration hypolimnion ice cover increase influence inland lakes insects Jour Lake Mendota lake water larvae light limnology littoral lotic margins maximum Michigan natural waters nekton nitrogen occur oligotrophic organic matter overturn photosynthesis phytoplankton plankters plankton plankton organisms ponds present production profundal Protozoa quantities region relations river rotifers seasonal seiches shallow shore species stagnation streams Studies submerged substances summer surface waters temperature thermal stratification thermocline tion Trans turbidity upper varies various vegetation vertical wave wind Wisconsin lakes zone