Phosphorus Cycle Notes [Free PDF]

By Ashutosh Yadav|Updated : November 13th, 2021

Hello Students, this is the third article in the series of biogeochemical cycles that are present in the Earth's Atmosphere. This topic is regularly asked in the state PCS Examinations. You can also download the PDF of these notes in both Hindi and English from the links given at the end of the article.

Phosphorous cycle

The transport and chemical transformation of phosphorus through the lithosphere, hydrosphere and biosphere are called phosphorus cycle.

The atmosphere does not play a significant role in the movement of phosphorus because phosphorus or phosphorus-based compounds are solids available in normal ranges of temperature and pressure of the earth. Most of the phosphorus remains within rocks, sediments, sand and the ocean floor with a fraction in living biomass. Phosphorus moves along trophic levels in an ecosystem by plant growth, herbivores and carnivores.


Note- Phosphates are effective fertilizers but they also cause pollution in lakes and streams. Over enrichment of it can lead to algae blooms. This excess of algae causes increased consumption by bacteria which lead to higher bacterial concentration. In this process, bacteria use much of dissolved oxygen in the water for cellular respiration and cause the death of fish due to oxygen deprivation.  

Biogeochemical cycles Notes in English PDF

Biogeochemical cycles Notes in Hindi PDF

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