Internal nutrient cycling
The nutrient cycle, which involves the movements of components between the ants and the soil only, are called internal nutrient cycling. Fallen leaves, wastes and dead roots give rise to dead and decaying organic matter This is called detritus. The detritus reaches the interior of the soil (This is called litter fall). With the help of decomposers the detritus is finally decomposed to inorganic nutrients and humus (This mechanism is called humification and mineralisation). As a result, the soil again becomes The in nutrients. These nutrients are absorbed by the plant again, and the cycle is completed. Such a cycle is called internal nutrient cycle. Biogeochemical cycles are named according to the component they involved, such as carbon cycle, oxygen cycle, carbon dioxide cycle, phosphorus ad nitrogen cycle. Two important cycles (ie., nitrogen cycle and phosphorus cycle) have been described here.