bio Lecture 23 - Biology 1050 I Ecosystem Ecology A Define...

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Biology 1050 Spring 2009 Dr. Vance-Chalcraft Lecture 21: Ecosystem Ecology and Climate I. Ecosystem Ecology A. Define ecosystem. - all the organisms in an area plus the physical environment B. What are 2 major ecosystem processes? - energy flow = passage of energy through the components of the ecosystem - nutrient cycling = use and reuse of nutrients within the ecosystem C. What determines the way energy and nutrients flow through ecosystems? - tropic levels = a level of the food chain a. What is a food chain? - sequence of food transfer from trophic level to trophic level i) What are producers? - photosynthetic organisms ii) primary consumers feed on producers. iii) secondary consumers feed on primary consumers. iv) What do decomposers eat? - dead organisms D. Energy Flow a. What does energy flow through? - food chain b. What are most calories taken in at one trophic level used to support? - 109 1
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Biology 1050 Spring 2009 Dr. Vance-Chalcraft i) Are those calories available to the next trophic level? ii) Energy gets lost as __________. iii) Are those calories available to the next trophic level?
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bio Lecture 23 - Biology 1050 I Ecosystem Ecology A Define...

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