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The hydrologic environment of Pool 19 of the Mississippi River
Phytoplankton communities in Navigation Pool No 7 of the Upper Mississippi River
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abundant algae annual aquatic macrophytes average backwater areas benthic biomass caddisflies carp chironomids Claflin collected communities confluences Corps of Engineers current velocities Cyprinid demersum densities deposition depth diatom dikes distribution diversity dominant downstream dredging Ecological Environmental eutrophic flood floodplain flow Fremling freshwater drum habitat types habitats Hexagenia Illinois River impoundment invertebrate Iowa Island Keokuk Lake Onalaska Lake Pepin larvae larval fishes Lock and Dam lower Lubinski M.S. Thesis macroinvertebrates macrophytes main channel border main-channel habitats marsh mayflies Minnesota navigation channel Navigation Pool occurred oligochaetes periphyton phycoperiphyton phytoplankton plant patches Pool 19 Pool 26 Pool 5A Potamogeton relatively reported River Mile sampling sediment Sefton side channels silt similar species standing crops stream study areas submerged substrates surface area Table taxa tion U.S. Army U.S. Army Corps Univ Upper Mississippi River upstream vegetation wetland Wildlife Wisconsin Wisconsin-La Crosse