Biogeochemical cycle

Biology Doubts

About Biogeochemical cycle

Organisms are built up on chemical substances. They require certain chemicals like N2, O2, H2, P, C, etc. continuously for their survival. These chemicals enter the organisms from the environment and come out after undergoing changes or without changes. Thus these elements tend to circulate in a characteristic path from the environment to the organism and back to the environment. This cyclical path of the elements from the abiotic system to the biotic system and back is called biogeochemical cycles (Bio = living organism; Geo = water, air, earth). As these chemicals form the components of food, these cycles are also called nutrient cycles.

Phases of biogeochemical cycles 

Each biogeochemical cycle has two phases, namely the biotic phase (organic phase) and the abiotic phase.

(i) Biotic phase : It refers to the flow of chemicals in the living organisms through food chain.

(ii) Abiotic phase : It refers to the distribution and flow of chemicals in the non-living environment.

Types of biogeochemical cycles

The biogeochemical cycles are classified into two types, namely gaseous cycles and sedimentary cycles.

(i) Gaseous cycles : In gaseous cycles the main reservoirs of chemicals are the atmosphere and ocean. e.g. Carbon cycle, N2 cycle, O2 cycle etc.

(ii) Sedimentary cycle : In sedimentary cycles the main reservoirs are soil and rocks. e.g., Sulphur cycle, phosphorus cycle, etc. For more details about the Biology you can refer zoology class 12 Notes prepared by academic team of entrancei . 

 

Deails about Biogeochemical cycle

 

 

 

 

Biogeochemical cycle

Biogeochemical cycle

Biogeochemical cycle

Biogeochemical cycle

Biogeochemical cycle

Talk to Our counsellor