Aquatic Ecosystems and Water Pollution

Aquatic Ecosystems and Water Pollution - input of inorganic...

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Aquatic Ecosystems and Water Pollution A. General 1. Overview of water pollution a. Three cases of aquatic ecosystems: streams and rivers, lakes and reservoirs, and oceans b. Four classes of water pollutants: disease organisms, inorganic nutrients: nitrogen and phosphorous, organic matter: plant and animal wastes c. Two classes of pollution sources: point sources: factories, sewage treatments plants, non-point sources: farms, acid rain 2. Historical: condition of America’s surface waters in 1900 and 1960 3. Clean water act of 1972: goals, approaches and evaluation B. Aquatic Ecology 1. Lakes and limnology a. Distribution and hydrodynamics of lake: flushing time: how long it takes to replace all, Thermal stratification: trapping of cold, dense water at the bottom of lakes, oxygen distribution in lakes: balance between production and respiration, most respiration is by bacteria decaying dead algae b. Eutrophication: accelerated biological productivity in water body resulting from
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Unformatted text preview: input of inorganic nutrients. natural and cultural c. Example: death and re-birth of Lake Washington 2. Stream ecosystems: bioenergetics and pollution problems C. Coastal oceans and water pollution 1. Historical: dilution is the solution to pollution 2. Red tides: dinoflagellates 3. Cultural eutrophication of coastal ocean: the dead zone 4. Nitrogen pollution: atmospheric deposition derived from burning fossil fuels, fertilizer added to agricultural fields and lawns, sewage treatment plants a. Terrestrial N saturation b. History of N flux in major rivers c. Sources of N in surface water 5. Conclusions: structural problems of population and agriculture The Omnivores Dilemma a. Nitrogen balance sheets for Northeast vs. Mississippi Valley b. Solutions? Phosphorous to surface waters: sewage treatment plants, fertilizer....
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This note was uploaded on 05/08/2008 for the course NRE 5040 taught by Professor D'souza,julia during the Spring '08 term at Cornell University (Engineering School).

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Aquatic Ecosystems and Water Pollution - input of inorganic...

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