We live in the environment where there are both biotic and abiotic components. Abiotic components are the air, water, light and temperature. Biotic is the living components which include human beings. This kind of ecological complex is called as the ecosystem. It deals with the relationships between the organisms and ecology. Thus, the interaction is both dependent on the ecology.


Water is the important source of all living beings. Oceans are the biggest storehouses of water as they evaporate for the formation of clouds. The evaporation process is also due by rivers, lakes and ponds. Condensation is a process in which the watervapour converts to rain. Now the rain water flows and fills all the water resources. 

A huge amount of water is recycled directly without the involvement of biotic components. The sun's heat and wind movement help to evaporate water from the exposed surface of the oceans. So, the rivers and lakes act as a reservoir here, which finally collects water to the oceans.


Living organism requires both proteins and nucleic acids for their survival. The atmosphere consists of 78 percent of ammonia and plants and animals can only use in the form of ammonia, nitrates or amino acids. This conversion is called the nitrogen cycle. 

The steps involve Nitrogen fixation, assimilation, Ammonification, Nitrification and Denitrification.

Nitrogen fixation is done by Nitrogen fixing bacteria and algae that converts ammonia into nitrates. Nitrogen Assimilation is done by Nitrates that are absorbed by plants are utilized for making organic matter such as proteins and nucleic acids. The process of urea, uric acid, which is released by amines and ammonia is released by the action of bacteria or fungi and it is called ammonification. Ammonia is then converted to nitrites, it is called as Nitrification and then denitrification occurs by reducing nitrate ions into gaseous nitrogen which returns to the atmosphere.


All living organisms are made up of carbon. The atmospheric carbon dioxide enters into the living world followed by photosynthesis and the carbon is passed. Carbon dioxide is returned back to the atmosphere through the decomposition of dead organic materials and volcanic activities.


Oxygen is important for respiration which contributes 20% of the air in the atmosphere. Enters into the living world through respiration and produces energy. 

Now-a-days we get climatic changes quickly due to the change in one of these cycles. Burning fossil fuels, using limestone for making concrete and more things. If any one of the cycle is disrupted it would be really difficult for the humans. It is purely our responsibility to save the nature!

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