During decomposition, what happens to carbon?

During decomposition, what happens to carbon?

• A. It is released back into the atmosphere as CO2
• B. It is converted into oxygen
• C. It becomes water
• D. It is stored in the ground permanently

Answer: (A)

When organisms decompose, microbes break down the carbon-containing compounds in their bodies and use that carbon as fuel in respiration. In this process, especially under aerobic conditions, the carbon is converted to carbon dioxide and released back into the atmosphere. So the main fate of carbon during decomposition is returning as CO2, rather than becoming oxygen, turning into water, or staying permanently stored underground. Some carbon can end up in soil as organic matter for a while, but it isn’t typically permanent and the CO2 release is the defining outcome of decomposition.

When organisms decompose, microbes break down the carbon-containing compounds in their bodies and use that carbon as fuel in respiration. In this process, especially under aerobic conditions, the carbon is converted to carbon dioxide and released back into the atmosphere. So the main fate of carbon during decomposition is returning as CO2, rather than becoming oxygen, turning into water, or staying permanently stored underground. Some carbon can end up in soil as organic matter for a while, but it isn’t typically permanent and the CO2 release is the defining outcome of decomposition.