What are Biogeochemical Cycles ?Both non-living (abiotic) and living (biotic) components of the biosphere constantly interact with each other to form a dynamic, and yet stable system. Such interactions include transfer of matter and energy between the different components of the biosphere. The nutrient elements derived from the earth by the living organisms for their growth and metabolism are called biogeochemical. These biogeochemical are continuously recycled. The movement of nutrient elements through living and non-living components of biosphere is called biogeochemical cycle.

Biogeochemical cycle..

Biogeochemical cycle..

Phosphorous cycle.

Phosphorous Cycle.

Carbon Cycle.

Nitrogen Cycle.

Water Cycle.

Oxygen Cycle.

Different Types of Biogeochemical Cycles …

Some examples of biogeochemical cycles are explained in next slides.They are :

The cycle of evaporation and condensation that controls the distribution of the earth's water as it evaporates from bodies of water, condenses, precipitates, and returns to those bodies of water is called water cycle.

The circulation of the earth's water, in which water evaporates from the sea into the atmosphere, where it condenses and falls as rain or snow, returning to the sea by rivers or returning to the atmosphere by evapotranspiration is called water cycle. It is also called hydrologic cycle.

OR

Water Water Cycle.Cycle.Water Water Cycle.Cycle.

Nitrogen Cycle…The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms. This transformation can be carried out through both biological and physical processes. Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and  denitrification. The majority of Earth's atmosphere (78%) is nitrogen, making it the largest pool of nitrogen. However, atmospheric nitrogen has limited availability for biological use, leading to a scarcity of usable nitrogen in many types of ecosystems. The nitrogen cycle is of particular interest to ecologists because nitrogen availability can affect the rate of key ecosystem processes, including primary production and decomposition. Human activities such as fossil fuel combustion, use of artificial nitrogen fertilizers, and release of nitrogen in wastewater have dramatically altered the global nitrogen cycle.

Nitrogen Cycle.

Carbon Cycle….

The carbon cycle is the biogeochemical cycle by which carbon is exchanged among the biosphere, exosphere, geosphere, hydrosphere, and atmosphere of the Earth. Along with the nitrogen cycle and the water, the carbon cycle comprises a sequence of events that are key to making the Earth capable of sustaining life; it describes the movement of carbon as it is recycled and reused throughout the biosphere.

These were the three types of biogeochemical cycles. They all have their own importance for human life.

Thank you …

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