Critical Load and Nutrient Cycles

Critical Load and Nutrient Cycles - Lakes • Eutrophic...

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1/31/11 Critical Load and Nutrient Cycles Excess nitrogen minerals in the soil are leaking into rivers, and eventually the ocean This does have positive effects for some forests Nitrogen runoff fertilizes forests Critical Load – amount of nutrients that begins to have negative affects
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1/31/11 Accelerated Eutrophication of
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Unformatted text preview: Lakes • Eutrophic lake – high in nutrients – Oligotrophic – low in nutrients • Sewage and factory runoff adds nutrients to lakes – Results in explosive increase of phytoplankton – Banks become choked with weeds – Algae blooms deplete oxygen content • Results in fish death...
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