29. Ecosystems - Nutrients Skeleton Fall 2007

29. Ecosystems - Nutrients Skeleton Fall 2007 - Final Exam...

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1 Final Exam 12:20 – 2:10 PM 2/5 comprehensive; 3/5 since Midterm III Higher trophic levels . .. Sample Questions - Blackboard General Study Guide Questions - Blackboard
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2 How Do Nutrients Cycle Through Ecosystems?
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3 Unlike energy … Nutrients ( N,P,K , trace elements and water ) are fixed on earth No significant extraterrestrial inputs First Law of Thermodynamics – can’t create matter Therefore, nutrients must cycle among trophic levels …
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4 Hypothesis: In addition to energy, nutrients limit ecosystem productivity If nutrients are limiting and must be recycled, Then areas with equal amounts of energy but different amount of nutrients should vary in productivity… Prediction:
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5 Upwelling areas near continents – surface waters driven by wind offshore, nutrient rich upwelling waters move in Fig. 56.2
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Biogeochemical Cycles Transfer of nutrients from physical/chemical biological organisms physical/chemical Involve key nutrients or elements ( water,
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29. Ecosystems - Nutrients Skeleton Fall 2007 - Final Exam...

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