Phosphorus Cycle The phosphorus cycle may also be referred to as the mineral cycle. The phosphorus cycle is the movement of phosphorus from the environment.

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The Phosphorus Cycle By: Jermaine Loutin (Jose Marti Six Form Envi.)

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Presentation transcript:

Phosphorus Cycle The phosphorus cycle may also be referred to as the mineral cycle. The phosphorus cycle is the movement of phosphorus from the environment to organisms and then back to the environment. Phosphorus is mainly found in water, soil, and rock. Phosphorus is essential for life. Component of DNA Building block of our bones and teeth.

Phosphorus Cycle

Phosphorus Cycle Unlike the other cycles, phosphorus cannot be found in air in the gaseous state. The phosphorus cycle is the SLOWEST cycle. Phosphorus is most commonly found in rock formations and ocean sediments as phosphate salts. Phosphate salts that are released from rocks through weathering usually dissolve in soil water and will be absorbed by plants.

Phosphorus Cycle Animals absorb phosphates by eating plants or plant-eating animals. When animals and plants die, phosphates will return to the soils or oceans again during decomposition. After that, phosphorus will end up in sediments or rock formations again, remaining there for millions of years. Eventually, phosphorus is released again through weathering and the cycle starts over.

Human Impacts on the Phosphorus Cycle Like nitrogen, increased use of fertilizers increases phosphorus runoff into our waterways and contributes to eutrophication.

REMEMBER THIS!!! Most phosphorus is found in rocks and soil. The phosphorus cycle is the slowest cycle. Excess phosphorus contributes to eutrophication.

Phosphates in organic compounds Uplifting of rocks Phosphates in organic compounds Weathering of rock Phosphates in rock Animals Plants Runoff Detritus Phosphates in soil (inorganic) Phosphates in solution Decomposition Detritivores in soil Precipitated (solid) phosphates Rock

Phosphorus Cycle Summary Now you have learned about the phosphorus cycle, check it out on the: Phosphorus Cycle Animation

Questions??? Question 11: Where is most phosphorus found? Questions 12: What is phosphorus used for in humans?