A1.2.5.1 The Phosphorus Cycle


The Phosphorus cycle is slow moving in comparison to the water or carbon cycles.

Phosphorus enters the environment from:

  • Rocks, which erode over time and gradually release it.
  • Decomposition of plant and animal matter.


It is a common occurrence for Phosphorus to be washed into water from erosion and leaching. Water plants use the Phosphorus as a fertiliser.

Phosphorus enters the food chain through animals eating plants (herbivores) or though other animals eating them (carnivores).

Source: http://vincejtremante.tripod.com/cycles/phosphours.htm