Mississippi River. Bottomlands, Levees, Estuaries, Gulf Hypoxia. Michael Pohlmann, Chad Ketcham, Phillip Tilson, Bradley Schmitz. Bottomlands/Floodplains. Low-lying forested and marsh areas extending away from a river or stream. Subjected to periodic flooding.
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Bottomlands, Levees, Estuaries, Gulf Hypoxia
Michael Pohlmann, Chad Ketcham, Phillip Tilson, Bradley Schmitz
What are Levees?
“A manmade barrier (embankment, floodwall or structure) along a watercourse constructed for the primary purpose to provide hurricane, storm, and flood protection relating to seasonal high water, storm surges, precipitation and other weather events; and that normally is subject to water loading for only a few days or weeks during a year”. (http://www.leveesafety.org/ip_leveedefinition_22March11.cfm)
1.) Enhancing the amount of nitrogen increases the growth of phytoplankton (photosynthetic algae), protists, and cyanobacteria that drift near the surface.
2.) Zooplankton consume large amounts of phytoplankton. The waste products and dead phytoplankton drift to the bottom of the ocean floor.
3.) Bacteria decomposers consume the dead organic matter. Bacteria populations increase and cause oxygen concentration in the water to decrease significantly as the bacteria consume oxygen.
4.) Low concentrations of oxygen suffocate shrimp and fish creating the “Dead Zone.”