The biogeochemical cycle of phosphorus is simpler compared to that of other elements such as carbon and nitrogen.
In the phosphorus cycle there is no passage of this element through the atmosphere.
Phosphorus is the only macronutrient that does not exist in the atmosphere. It is found only in its solid form in rocks.
Only one phosphorus compound is important for living things - the phosphate ion.
The phosphorus cycle is important because it influences the growth and survival of living beings.
Phosphorus Cycle Stages
The main reservoir of phosphor in nature it is the rocks.
The cycle starts when the rocks suffer weathering and release the phosphate ion into the soil.
Thus, this compound can be carried to rivers, oceans and lakes or incorporated by living beings.
When they are used by living beings, they can return to nature during the decomposition of organic matter.
Phospholytic bacteria act in this process and transform phosphorus into a soluble compound, which can be easily dissolved in water.
Phosphorus can be taken to rivers, lakes and seas. In aquatic environments, phosphorus can be used by living beings or it settles and be incorporated into rocks in formation.
Over time, the rocks weather and the cycle begins again.
Thus, the phosphorus cycle can be differentiated into two aspects related to time scales:
- ecological time cycle: Occurs in a relatively short time. It happens when some of the phosphorus atoms are recycled between soil, plants, animals and decomposers.
- geological time cycle: occurs for a long time. It happens when another part of the phosphorus atoms is sedimented and incorporated into the rocks.
Phosphorus Cycle Overview. The cycle takes place in the terrestrial and aquatic environment.
Learn more about Biogeochemical Cycles.
