Carbon Cycling
- Created by: lavithedemon
- Created on: 03-04-16 12:15
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- Carbon cycling
- autotrophs convert carbon dioxide into carbohydrates and other carbon compounds
- in acquatic habitats, carbon dioxide is present as a dissolved gas and hydrogen carbonate ions
- carbon dioxide diffuses from the atmosphere or water into autotrophs
- carbon dioxide is produced by respiration and diffuses out of organisms into water or the atmosphere
- methane is produced from organic matter in anaerobic conditions by methanogenic archaeans and some diffuses into the atmosphere
- bacteria that convert organic matter into a mixture of organic acids
- bacteria that use the organic acids and alcohol to produce acetate, carbon dioxide and hydrogen
- Archaeans that produce methane from carbon dioxide, hydrogen and acetate
- mud
- waterlogged environments
- guts of termites and ruminant mammals
- landfill sites
- methane is oxidised to carbon dioxide and water in the atmosphere
- peat forms when organic matter is not fully decomposed because of anaerobic conditions in waterlogged soils
- partially decomposed organic matter from past geological eras was converted into oil and gas in porous rocks or coal
- carbon dioxide is produced by the combustion of biomass and fossilised organic matter
- Animals such as reef-building corals and molluscs have hard parts that are composed of calcium carbonate and can become fossilised in limestone
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