Nutrient cycle that occurs in the environment includes phosphorous cycle, water cycle, nitrogen cycle, and carbon cycle. A portion of both the nitrogen and carbon cycle occurs in the living organism and a portion occurs in the non-living environment. Nitrogen enters the environment to be beneficial for the plants. Carbon from the atmosphere is used for photosynthesis.
Explanation of Solution
The coupling of nitrogen as well as the carbon cycle is owing in part as the rates of primary production of carbon is dependent upon the fixed nitrogen availability. For instance, if ammonia otherwise nitrate is obtainable, the rate of primary production is increased. Apart from this, high concentrations of organic forms of carbon induce the nitrogen fixation process, whereas the lower concentrations of organic carbon decrease the nitrogen fixation. This fixation process is the chief part in the nitrogen cycle. Therefore, it can be said that the nitrogen and the carbon cycle are coupled.
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Brock Biology of Microorganisms (14th Edition)
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