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As there is constant interaction between both biotic components and abiotic components in the biosphere which make it a dynamic but stable system. As a result of these interactions there occurs transfer of matter and energy between the different components of the biosphere. The term biogeochemical is made from two words: they are biological, chemical and geological processes. As energy flows through the ecosystem and further it is released in the form of heat along with recycling of chemical elements.
Along with UPSC exams, these NCERT notes are equally important for other competitive exams like PO, SSC, state civil services exams and so on. In this article we will be covering all aspects of biogeochemical cycles.
The process by which these elements or compounds move between its several biotic and abiotic forms and locations in the biosphere is called a biogeochemical cycle. It can also be defined as the movement of nutrients and other elements between living and non-living beings. The sun is the major source of energy over here as each organism is directly or indirectly dependent on this energy.
Earth contains a wide diversity of organisms and each organism exists and survives in a diversity of associations. Such a survival process encompasses the presence of systemic flows such as flows of energy, water, and nutrients. For balancing chemical elements there are different cyclic movements through the tissues of plants and animals. And each cycling movement starts with absorbing the chemical elements by the organism and is returned to the air, water, and soil through decomposition.
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Geochemical cycle are of two types, they are:
Check the NCERT Notes Geography on Volcanoes here.
There are various steps involved in the water cycle, they are: evaporation, transpiration, condensation and precipitation.
Check the NCERT Notes Geography on Continental Drift for UPSC.
The process through which nitrogen passes from the atmosphere to the soil and organisms, and at last released back into the atmosphere is called the Nitrogen cycle.
You might also like: NCERT notes on the Hydrologic cycle
Carbon as an element is repeatedly cycled through different forms by the various physical and biological activities constituting the carbon cycle.
Study the NCERT Notes Geography on Extra Tropical Cyclones for UPSC exam.
The process by which oxygen is used from the atmosphere by organisms and again released back into the atmosphere through the process of photosynthesis called oxygen cycle.
Also, check the NCERT Notes Geography on Endogenic Processes here.
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This cycle is important for the survival of various organisms including human beings. Some of the importance of biogeochemical cycle are listed below:
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Q. The cycling, at various scales, of minerals and components through the ecosystem is known a
(a) Biological cycle
(b) Biogeochemical cycle
(c) Biochemical cycle
(d) None
Ans. Biogeochemical cycle
Q. Cycle of which of the following atmospheric gases involves the major constituent of the atmosphere?
(a) Oxygen
(b) Carbon Dioxide
(c) Argon
(d) Nitrogen
Ans. Nitrogen
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We hope the above NCERT Notes on Geography Topic Biogeochemical Cycles proves to be useful for UPSC aspirants and for preparation of other competitive exams. For more notes and updated details on this topic, download the Testbook App and get exam-ready in no time!
Also check the related Geography articles in the table below: | |
NCERT Notes: Composition of the Atmosphere | Earthquakes |
NCERT Notes: Types Of Clouds | The Geological History Of The Earth |
Major ports in india | Cyclones And Anticyclones |
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