Lecture_14_SAC_GlobalChange

Lecture_14_SAC_GlobalChange - Global Ecology: Impacts of...

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Global Ecology: Global Ecology: Impacts of economic development Impacts of economic development Alterations to nutrient cycles Alterations to carbon cyclesThe P cycle Carbon cycle
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Global Ecology: Global Ecology: Impacts of economic development Impacts of economic development Alterations to nutrient cycles: The N cycle example Revisiting the C cycle The Wedge Game
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Changing nutrient cycles: Changing nutrient cycles: Beyond the green revolution Beyond the green revolution
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Changing nutrient cycles: Changing nutrient cycles: Beyond the green revolution Beyond the green revolution fertilizer use in 1990 (kg N km y ). Bouwman et al. (1995) and FAO statistics Fritz Haber, 1918
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Changing nutrient cycles: Changing nutrient cycles: Beyond the green revolution Beyond the green revolution Corn yields in the USA: Wheat yields in developing countries
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Changing nutrient cycles: Changing nutrient cycles: Beyond the green revolution Beyond the green revolution
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Changing nutrient cycles: Changing nutrient cycles: Beyond the green revolution Beyond the green revolution
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Green revolution in a nutshell
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How has economic growth impacted How has economic growth impacted natural ecosystems? natural ecosystems?
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N inputs N inputs In pristine systems, biological N fixation is the main source Cultivation of N-fixing crops Humans have increased global N fixation by almost 3 X Fixation via fossil fuel emissions (N deposition) Industrial N fixation via Haber-Bosch We will talk more about the anthropogenic effects on the N cycle later!
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Changing N Cycle: Changing N Cycle: Human inputs to N cycle
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This note was uploaded on 07/13/2011 for the course PCB 4034C taught by Professor Osenberg during the Spring '11 term at University of Florida.

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Lecture_14_SAC_GlobalChange - Global Ecology: Impacts of...

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