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Ecological Cycles

BioEd Online. Ecological Cycles. Energy is used up, but materials are recycled Cycling of materials between the environment and organisms. Chemical and biological processes Examples Carbon cycle Water cycle Nitrogen cycle. BioEd Online. Carbon Cycle. Carbon Cycle.

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Ecological Cycles

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  1. BioEd Online Ecological Cycles • Energy is used up, but materials are recycled • Cycling of materials between the environment and organisms. • Chemical and biological processes • Examples • Carbon cycle • Water cycle • Nitrogen cycle

  2. BioEd Online Carbon Cycle

  3. Carbon Cycle • Carbon found in atmosphere, soil, oceans, fossil deposits, living organisms • Flows from photosynthetic organisms through food chains • Returned to atmosphere by combustion and respiration

  4. BioEd Online Water Cycle

  5. Water Cycle • Continuous circulation of moisture • Between atmosphere – surface of Earth • Water cycles from gas to liquid states • Precipitation • Transpiration • Evaporation • Cycle is driven by energy from the sun Animation

  6. BioEd Online Nitrogen Cycle • Essential for all living organisms to create protein • Usable for organisms if “fixed” • Often combined with Oxygen, Hydrogen, or Carbon

  7. Carbon Cycle Respiration Animals Photosynthesis Bicarbonate Plants Decomposition Diffusion Dissolved CO2 CO2 in Atmosphere Carbonate in Sediment Water Cycle Runoff Solar Energy Precipitation Ocean Runoff and Groundwater Evapotranspiration Nitrogen Cycle Assimilation Nitrogen-fixing in root nodules Decomposition: fungi & bacteria Cycle Labels

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