4.5 – The Phosphorus Cycle Science 10 Mr. Francis.

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Presentation transcript:

4.5 – The Phosphorus Cycle Science 10 Mr. Francis

Phosphorus… Who Cares Phosphorus is a very important elements in many components of living things. Unlike Carbon, and Nitrogen, Phosphorus is not found in the atmosphere in its cycle

Where is phosphorus? Phosphorus comes from the earth’s crust Phosphate ions (PO43-) dissolve in water. They are moved by weathering and absorbed by producers

There are two components to the phosphorus cycle: the short cycle and the long cycle The short cycle occurs when organisms die and decompose. Their stored phosphorus becomes available to producers. The long cycle describes the geological path of phosphorus (how it becomes stored as rock)

More symbiosis Mycorrhizae are fungi that exist mutualistically with most plants. The fungus makes phsophate more soluble so that the plant can use it. The plant provides the fungus with carbohydrates

The human link Humans introduce a lot of phosphorus to the ecosystem by using fertilizers and animal manure Sewage treatment plants also introduce phosphates to the water

The assignment Page 100 Questions 1-5,8,10,15,16