What is the primary role of micro-organisms in the carbon cycle?

The primary role of micro-organisms in the carbon cycle is to decompose dead plants and animals. This decomposition process is vital as it breaks down organic matter, returning nutrients to the soil and releasing carbon dioxide back into the atmosphere. When organisms die, they become a source of carbon, and micro-organisms such as bacteria and fungi play a crucial role in breaking down this organic material.

Through decomposition, micro-organisms facilitate the recycling of carbon, ensuring that it can be used again by living organisms. This activity helps maintain the balance of carbon in the environment, supports nutrient cycling, and sustains ecosystem functions. Thus, the significant role of micro-organisms in the carbon cycle is centered around their ability to decompose organic matter effectively.