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28. Ecosystems - Energy Skeleton Fall 2007

28. Ecosystems - Energy Skeleton Fall 2007 - Final Exam Dec...

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1 Final Exam Dec 11 Tues. 12:20-2:10 2/5 comprehensive; 3/5 since Midterm III
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2 How Does Energy Flow Through Ecosystems?
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3 First, what is an ecosystem? Biological community plus the physical environment (living and non-living) Physical environment includes energy, nutrients, climate, pH, etc. Not really different from communities, but a different approach is used …
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4 A Simple Food Web … Focus on intraspecific and interspecific interactions Individual populations and species Species diversity We already done this Community Approach ...
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5 A Simple Food Web … Focus on energy flow through trophic levels Ignore individual species and populations Focus on how nutrients etc. affect energy flow, productivity, biomass Ecosystem Approach ...
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6 A Simpler Food Web … Primary Producers - Photosynthesizers Primary Consumers - Herbivores Secondary Consumers - Carnivores Tertiary Consumers - Carnivores
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7 An Even Simpler Food Web … Primary Producers Primary Consumers Secondary Consumers Tertiary Consumers
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8
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9 How does energy flow through ecosystems?
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