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The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmospheric, terrestrial, and marine ecosystems. The conversion of nitrogen can be carried out through both biological and physical processes.
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Nitrogen cycle. Nitrification is the biological oxidation of ammonia to nitrate via the intermediary nitrite. Nitrification is an important step in the nitrogen cycle in soil. The process of complete nitrification may occur through separate organisms [1] or entirely within one organism, as in comammox bacteria. The transformation of ammonia to ...
The nitrogen cycle is one of the Earth's biogeochemical cycles. It involves the conversion of nitrogen into different chemical forms. The main processes of the nitrogen cycle are the fixation, ammonification, nitrification, and denitrification. As one of the macronutrients, nitrogen plays an important role in plant growth.
Microbial nitrogen cycle. Process by which ammonia is processed through microbial organisms for lipid and protein production. The discovery of Nitrososphaera capable of ammonia oxidation indicated that both archaea and bacteria were capable of ammonia oxidation. [10] Ammonia-oxidizing archaea have been comparable to ammonia-oxidizing bacteria. [2]
The Oceanic carbon cycle is a central process to the global carbon cycle and contains both inorganic carbon (carbon not associated with a living thing, such as carbon dioxide) and organic carbon (carbon that is, or has been, incorporated into a living thing). Part of the marine carbon cycle transforms carbon between non-living and living matter.
Anammox, an abbreviation for "anaerobic ammonium oxidation", is a globally important microbial process of the nitrogen cycle [1] that takes place in many natural environments. The bacteria mediating this process were identified in 1999, and were a great surprise for the scientific community. [ 2 ]
Nitrification is a crucial component of the nitrogen cycle, especially in the oceans. The production of nitrate (NO 3 − ) by oxidation of nitrite (NO 2 − ) is accomplished by nitrification - the process that produces the inorganic nitrogen that meets much of the demand of marine oxygenic, photosynthetic organisms such as phytoplankton ...