The phosphorus cycle differs from the biogeochemical cycles in that

The foundation of relative dating is it does not have an atmospheric reservoir. The phosphorus cycle does not include gas phase. Its largest reservoir is located in sedimentary rocks, and the cycle begins there. Phosphate from rocks are eliminated and then released into the soil and water. The phosphate ions then absorbed by plants and transferred to animals or organisms which eat plants. It is then returned to the soil by way of excretion and decomposed by plants and animals when they die.

from my research i have to the conclusion that decomposers, such as fungi, bacteria and invertebrates, play a critical role in nutrient cycling and without them the earth's ecosystem may not support life as we know it. elements such as carbon, nitrogen and phosphorus exist in limited amounts on earth, although huge amounts of carbon are being released into the atmosphere from underground sources now by humans. it is still extremely important that other nutrients be retained by the process of re-use. decomposers are organisms that are able to chemically break down dead material and make these elements available for use by other organisms. without this breakdown of dead material, dead bodies would pile up. so decomposers also play a role in clean up also. without them, life might not continue as we know it and dead material would overwhelm the earth.