BS 110 Notes 11-15-2010 - BS 110 Notes Eutrophication...

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BS 110 Notes 11-15-2010 Eutrophication Increased nutrients in an aquatic environment cause dramatic increases or blooms of photosynthetic organisms Nutrients = phosphorus, nitrogen, fertilizer, sewage When organisms die, provide food for the bacteria and other decomposers that use up O2 Often results in massive die-offs on animals that need O2 Conversion of an aquatic environment to a highly productive one with rapid decomposition and low oxygen and filling with decomposing matter and changes in species composition of the aquatic environment Processes of Biotic Component Photosynthesis – process in which the light energy of the sun is converted into chemical energy by plants o 6CO2 + 6H2) >>> C6H12O6 +6O2 Chemosynthesis – organisms in the domains archaea and bacteria and some fungi produce their own energy by the oxidation (addition of oxygen) of inorganic substances Cellular Respiration – energy rich compounds are broken down into their raw materials
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