Carbon cycle A biogeochemical cycle Which carbon is exchanged between organisms, soil, water and atmosphere of the Earth, carbon is an element essential element of life. The estimated composition 50% of the tissue of living organisms. And in the form of carbon dioxide Which are essential for plant growth. The circulation of carbon in the ecosystem can be divided into three types according to the time it takes to rotate the anniversary of the short, medium and long-term to short-term revolving the circulation of carbon in carbon dioxide through photosynthesis and respiration. From plants to freeze carbon dioxide in the atmosphere are synthetic organic chemicals. Carbon from the atmosphere, thus moving into the plant. Occur both on land and in the water equation 6CO2 + 6H2O → C6H12O6 + 6O2 in photosynthesis. The plant will transform solar energy into chemical energy. Some are used to Some were collected in the form of carbohydrates. Which is transmitted to the food chain. These carbon returns to the atmosphere through respiration. And the degradation of the living things die down. This degradation may be in the form of carbon dioxide or carbon dioxide, methane. Back atmosphere of microbial degradation occur two conditions is. The presence and absence of oxygen In the presence of oxygen Organic carbon is emitted in the form of carbon dioxide. In anaerobic conditions Carbon is emitted in the form of methane. The working group of bacteria Methanogen methane is converted to carbon dioxide. Methylotroph by bacteria such as Methylomonas forms of carbon monoxide is caused by a chemical reaction of methane light. Or from the combustion of biomass by carbon monoxide is toxic to aquatic life. But there are some creatures use carbon monoxide as energy sources, such as Pseudomonas carboxidoflava and Pseudomonas carboxydohydrogena. Which turns carbon monoxide into carbon dioxide in the presence of oxygen. In anaerobic conditions Methanosarcina barkeri turns carbon monoxide into methane and Clostridium thermoaceticum. Replace carbon monoxide, acetic acid turnover, long-term flow of carbon through the structure of the world in the earth. Ocean and limestone A key component of limestone is calcium carbonate. Limestone is a key source of global carbon sequestration. The change of weather and erosion will leach calcium from limestone, silica and carbon equation CaCO3 + CO2 → Ca2 + + 2HCO3- CaSiO3 + 2CO2 + H2O + SiO2 → 2HCO3- things from going down to the river erosion. Ca2 + and HCO3- to the ocean and some will be used to build the structure of the lives that have calcium carbonate compounds. Such as shells Some of the carbon dioxide back into the atmosphere. When an organism dies Will be decomposed into carbon dioxide in deep water. Which is returned to the atmosphere on the water, then roll up.
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