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CYCLING OF CARBON ATOMS

CYCLING OF CARBON ATOMS. Energy Flow & Nutrient Cycling. Life on Earth depends upon one–way flow of high–quality energy from sun & cycling of crucial elements. CYCLING OF CARBON ATOMS. Carbon atoms are recycled through the living and non-living parts of an ecosystem.

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CYCLING OF CARBON ATOMS

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  1. CYCLING OF CARBON ATOMS

  2. Energy Flow & Nutrient Cycling Life on Earth depends upon one–way flow of high–quality energy from sun & cycling of crucial elements.

  3. CYCLING OF CARBON ATOMS • Carbon atoms are recycled through the living and non-living parts of an ecosystem. • Producers take up carbon dioxide and build this into organic molecules (sugars and starches) • Consumers eat this organic matter. • Draw a summarised flow chart to indicate the flow movement of carbon atoms in a terrestrial ecosystem.

  4. CYCLING OF CARBON ATOMS • Carbon is taken up from the atmosphere by plants by photosynthesis. • Because carbon enters the atmosphere, it can move through the atmosphere on a global scale.

  5. Basic Carbon cycle: The Carbon Cycle

  6. Carbon Cycle

  7. Layers of the Earth • Hydrosphere- water layer. Liquid, Ice, Vapor. • Lithosphere- Earth’s crust and upper mantle. • - Fossil fuels, minerals, soil chemicals. • Biosphere- biotic & abiotic factors.

  8. Carbon Cycle Atmosphere Biosphere Lithosphere Hydrosphere

  9. Carbon Cycle: Reservoirs Atmosphere 1x (= 7.3x1017 grams carbon) Biosphere 3x 55x 35,000x Lithosphere Hydrosphere

  10. Respiration& Decay Photosynthesis Carbon Cycle Atmosphere Biosphere Lithosphere Hydrosphere

  11. Respiration& Decay Photosynthesis Dissolution Weathering & Volcanism Exsolution Burial & Lithification Photosynthesis Burial & Lithification Carbon Cycle Atmosphere Biosphere Lithosphere Hydrosphere

  12. Deforestation: Decrease Photosynthesis Increase Respiration Burning fossil fuels: Increased combustion Carbon Cycle Human Impacts Atmosphere Biosphere Net Effect: Increase in Carbon in Atmosphere Lithosphere Hydrosphere

  13. Carbon Cycle

  14. Major components of aquatic ecosystems. Fig. 4–11

  15. Major components of terrestrial ecosystems. Fig. 4–12

  16. HUMAN IMPACT • Carbon dioxide is added to the atmosphere by human activities – burning fossil fuels (coal and oil). Carbon dioxide is a greenhouse gas.

  17. The Carbon Cycle • How and in what form does carbon enter and leave the cycle? • How do the roles of autotrophs and heterotrophs differ? • What are the human impacts on the cycle?

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