54.2 outline

54.2 outline - How do nutrients cycle through Ecosystems...

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How do nutrients cycle through Ecosystems • When an organism eats another organism energy POP’s, nitrogen, phosphorus, calcium, and other nutrients are transferred. • Atoms are reused as they move through tropic levels, but also spend time in the air, dissolved in water, or held in soil. WHAT IS BIGEOCHEMICAL CYCLE?? Biogeochemical cycle - the path the element takes as it moves through the consumers, producers, and decomposers • Figure 54.11 shows the terrestrial nutrient cycle • Soil organic matter is a mixture of partially and completely decomposed matter. Humus is completely decayed organic matter and is rich in carbon containing molecules and humic acids. WHY IS DECOMPOSITION IMPORTANT?? Decomposition converts the nutrients in soil organic matter to an inorganic form and then the nutrients can be taken in by plants What are the factors that control the rate of nutrient cycling?? Decomposition rate is affected by: abiotic conditions--oxygen, temperature, precipitation &
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This note was uploaded on 02/12/2012 for the course SCI 2341 taught by Professor Yates during the Spring '11 term at Alabama.

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54.2 outline - How do nutrients cycle through Ecosystems...

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