Phosphorus Cycle

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Phosphorus Cycle. What is Phosphorus ?. I s an essential nutrient for plants and animals in the form of ions. Phosphorus is also a building block of certain parts of the human and animal body. What is Phosphorus Cycle ?. - PowerPoint PPT Presentation

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Phosphorus Cycle

Phosphorus CycleWhat is Phosphorus?Is an essential nutrient for plants and animals in the form of ions.

Phosphorus is also a building block of certain parts of the human and animal body.

What is Phosphorus Cycle?Thephosphorus cycleis thebiogeochemical cyclethat describes the movement ofphosphorusthrough thelithosphere,hydrosphere, andbiosphere.

Low phosphorus availability slows down microbial growth

Ecological FunctionIs an essential nutrient for plants and animals in the form of ions. Phosphorus is alimiting nutrientfor aquatic organisms.

Eighty percent of the mined phosphorus is used to make fertilizers.

Enrichment of phosphate can lead toeutrophication of fresh and inshore marine waters.Biological FunctionThe primary biological importance of phosphates is as a component ofnucleotides.

It also functions as buffering agent in maintaining acid basehomeostasisin the human body.

Process of the Cycle

Phosphates moves quickly through plants and animals.

Unlike other cycles of matter compounds, phosphorus cannot be found in air as a gas, it only occurs under highly reducing conditions as the gasphosphine PH3.

Phosphorus is typically the limiting nutrient found in streams, lakes and fresh water environments. The small losses in a terrestrial system caused by leaching through the action of rain are balanced in the gains from weathering rocks.

Herbivores obtain phosphorus by eating plants, and carnivores by eating herbivores.

Phosphorus is released back to the soil when plants or animal matter decomposes and the cycle repeats.

Phosophatic MineralsThe availability of phosphorus in ecosystem is restricted by the rate of release of this element during weathering.

The release of phosphorus fromapatitedissolution is a key control on ecosystem productivity

Plant and animal growth depends on the rate of their degradation to generate free phosphateHuman InterferenceHumans alter the cycle by:

Cutting the tropical rain forestThe use of agricultural fertilizersThe use of laundry detergents

What is natural eutrophication?

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