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CYCLING OF CARBON ATOMS
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Life on Earth depends upon one–way flow of high–quality energy from sun & cycling of crucial elements.
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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. 1. Draw a summarised flow chart to indicate the flow movement of carbon atoms in a terrestrial ecosystem.
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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.
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Basic Carbon cycle: The Carbon Cycle
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Carbon Cycle
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Hydrosphere- water layer. Liquid, Ice, Vapor. Lithosphere- Earth’s crust and upper mantle. - Fossil fuels, minerals, soil chemicals. Biosphere- biotic & abiotic factors.
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Carbon Cycle Atmosphere Hydrosphere Lithosphere Biosphere
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Carbon Cycle: Reservoirs Atmosphere Hydrosphere Lithosphere Biosphere 1x (= 7.3x10 17 grams carbon) 3x 55x 35,000x
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Carbon Cycle Atmosphere Hydrosphere Lithosphere Biosphere Photosynthesis Respiration& Decay
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Carbon Cycle Atmosphere Hydrosphere Lithosphere Biosphere Photosynthesis Respiration& Decay Burial & Lithification Weathering & Volcanism Dissolution Photosynthesis Burial & Lithification Exsolution
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Carbon Cycle Atmosphere Hydrosphere Lithosphere Biosphere Human Impacts Burning fossil fuels: Increased combustion Deforestation: Decrease Photosynthesis Increase Respiration Net Effect: Increase in Carbon in Atmosphere
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Carbon Cycle
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Major components of aquatic ecosystems. Fig. 4–11
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Major components of terrestrial ecosystems. Fig. 4–12
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HUMAN IMPACT Carbon dioxide is added to the atmosphere by human activities – burning fossil fuels (coal and oil). Carbon dioxide is a greenhouse gas.
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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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