Phosphorus Cycle Phosphorus is a major constituent of biological membranes, nucleic acids and cellular energy transfer system. Many animals also need phosphorus to make their shells, bones and teeth. The natural reservoir is rock, which contains phosphorus in the form of phosphates. When rocks are weathered, minute amounts of these phosphates dissolve in soil solution and are absorbed by the roots of the plants. Herbivores and other animals obtain this elements from plant source. Organic waste products and the dead organisms are decomposed by the phosphate solubilising bacteria releasing phosphorus.
A simplified model of phosphorus cycling in a terrestrial ecosystem
- Producers — e.g., Grass.
- Consumers — e.g., Grasshopper.
- Decomposers — e.g, Bacteria.
