Lecture 11 Eco2C

Lecture 11 Eco2C - 2/24/09 1 Overview - Ecosystem Ecology...

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Unformatted text preview: 2/24/09 1 Overview - Ecosystem Ecology I. Energy flows A. Primary production 1. marine 2. freshwater 3. terrestrial B. Secondary production 1. production efficiency 2. trophic efficiency II. Why is the world green? III. Nutrient cycles: water, C, N, P IV. Hubbard Brook II. Why is the world green? Why dont primary consumers (herbivores) eat all the vegetation? What limits herbivore abundance? What limits herbivore abundance? 1. Plant defenses nicotine caffeine raspberry stem cannabinoids in marijuana What limits herbivore abundance? 2. Nutrients, not energy supply, limit herbivores What limits herbivore abundance? 3. Abiotic factors What limits herbivore abundance? 4. Intraspecific competition 2/24/09 2 What limits herbivore abundance? 5. Natural enemies What limits herbivore abundance? 1. Plant defenses 2. Nutrients, not energy supply, limit herbivores 3. Abiotic factors 4. Intraspecific competition 5. Natural enemies Overview - Ecosystem Ecology I. Energy flows A. Primary production A....
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Lecture 11 Eco2C - 2/24/09 1 Overview - Ecosystem Ecology...

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