Phosphorus Cycle.

Added by | 9 yearss ago

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Phosphorus Cycle: 1. The main sources of the phosphorus are found in the earth's crust. 2. With weathering, rocks release phosphorus in the form of phosphate H2PO4. 3. The phosphorus enters the soils, where plants take it through the roots. 4. When animal eat plants, they take up the phosphorus, and when the plant or animal dies, or release their wastes, phosphorus become available to decomposers, such as fungi, and bacteria. 5. The decomposers break the tissues, and release the phosphate into the environment, where plants can take it up again. 6. From land phosphorus can enter the oceans, by runoff, or leaching. 7. Once in the ocean, phosphorus enters the marine food chain. 8. A single phosphorus atom, might cycle between the bodies of organisms, and oceans, for an average of 1000 years, before it settle down in the ocean bottom, and form sedimentary rocks, where it might be trapped for 100 million, or more years. 9. Unlike carbon, sulphur, and nitrogen cycles, phosphorus does not cycle through the atmosphere; instead it has a sedimentary cycle. 10. Phosphorus in the oceans sediments must be lifted with geological changes, to reach earth's surface again, where the cycle can continue. 11. Humans also provide phosphorus through fertilizers, which contains abundant phosphorus that enters the environment. Also, sewage treatments add extra phosphorus in rivers, lakes, and oceans. Extra phosphorus put some organisms like algae, at a growth advantage, and causes the disbalance ...

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