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THE PHOSPHATE CYCLE © 2016 Paul Billiet ODWS.

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Presentation on theme: "THE PHOSPHATE CYCLE © 2016 Paul Billiet ODWS."— Presentation transcript:

1 THE PHOSPHATE CYCLE © 2016 Paul Billiet ODWS

2 Phosphates and phosphorus
Phosphate groups are found attached to many important biomolecules: Nucleic acids ATP Phospholipids Phosphorus cycles in the biosphere It cycles relatively slowly between the biosphere, the hydrosphere and the lithosphere There is little cycling of phosphorus in the atmosphere. © 2016 Paul Billiet ODWS

3 Plants need phosphates
Plant biomolecules Root uptake Phophate mostly H2PO4- © 2016 Paul Billiet ODWS

4 Phosphates are recycled via microbes
Root uptake Phosphate Plant biomolecules Feeding Animal biomolecules Death & faeces Soil organic phosphate Decompostion © 2016 Paul Billiet ODWS

5 Phosphates are recycled in water too
Decompostion Soil organic phosphate Animal biomolecules Root uptake Phosphate Plant biomolecules Dissolved phosphates Aquatic communities © 2016 Paul Billiet ODWS

6 Phosphates in the lithosphere
Decompostion Soil organic phosphate Animal biomolecules Root uptake Phosphate Plant biomolecules Dissolved phosphates Aquatic communities Precipitation Erosion Rocks Sediments © 2016 Paul Billiet ODWS

7 Soil organic phosphate
Human impacts HARVESTING Decompostion Soil organic phosphate Animal biomolecules Root uptake Plant biomolecules Phosphate Dissolved phosphates Aquatic communities HUMANS SEWAGE/ DETERGENTS Eutrophication FERTILIZER Precipitation Erosion MINING Rocks Sediments © 2016 Paul Billiet ODWS

8 Phosphates a non-renewable resource?
© 2016 Paul Billiet ODWS UNEP 2011

9 Global phosphate fertilizer consumption
© 2016 Paul Billiet ODWS

10 The future? © 2016 Paul Billiet ODWS

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