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Ecosystems - Ecosystems Read pp 180-194 and 205-215(lakes...

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1 Ecosystems Read pp. 180-194 and 205-215 (lakes) Review sections of Ch. 3 ( Biology ) Energy and Mass Flow (section 5-3 and section 3-4) Nutrient Cycles (section 5-4)
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2 Energy and Mass Flow (sections 5-3 and 3-4) Primary Consumers are herbivores that use plants for energy and their carbon source Secondary Consumers are carnivores. Decomposers use the products of organisms for energy and carbon source Primary Producers use Sunlight as ENERGY ( Photosynthesis ) and Carbon from inorganic sources ( Autotrophs ) to grow: 6CO 2 + H 2 O + 2800 kJ chlorophyll C 6 H 12 O 6 + 6 O 2 energy from the sun new cellular material p. 110, and Eq. 5-1, p. 183 Gulf Hypoxia? Fossil Fuels?
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3 The above is Table 5-1. Details are given in section 5-3 and in sections 3-7 thru 3-10.
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4 Not only is energy and carbon moved through the food web, but so can some chemicals ! Example for PCBs : Fig. 5-4
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5 Example: Bioconcentration Bioaccumulation: total sources of a pollutant in an organism Bioconcentration: Pollutants in the organism only from air or water (not food) Bioconcentration factor: Concentration in organism = concentration in
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