Guano is the faeces of sea birds and also fossilised bones and they contain phosphorus
Weathering and erosion of rocks gradually releases phosphorus as phosphate ions which are soluble in water
When plant materials and waste products decay they release phosphate and returned to the environment for reuse
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Phosphate, Ions and Faeces/Urine
Phosphate is used in many molecules and is essential to life and it is released from many different sources including decay and erosion of rocks
Faeces and Urine are sources of phosphate ions
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Saprobionts, Oceans and Soils
When weathering and erosion causes rocks to realese phosphate ions into the soil, plants then take up the phosphate ions from the soil and then the plants are eaten by animals
Phosphorus in soil can end up in the water and eventually the ocean and can be incorporated into sediment over time
Saprobiotic decay release ions which contain phosphorus
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