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, mineralization, nitrification, and denitrification. The majority of Earth's atmosphere (approximately 80%) 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.

A 2011 study found that nitrogen from rocks may also be a significant source of nitrogen, that had not previously been included.

Read more about Nitrogen CycleEcological Function, The Processes of The Nitrogen Cycle, Marine Nitrogen Cycle, Human Influences On The Nitrogen Cycle

Other articles related to "nitrogen cycle, nitrogen, cycles, cycle":

Human Influences On The Nitrogen Cycle - Environmental Impacts
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... One of the major cycles that humans can contribute to that cause a major impact on climate change is the nitrogen cycle ... This comes from nitrogen fertilizers that us humans are using ... and Galloway have researched, "The massive acceleration of the nitrogen cycle caused by the production and industrial use of artificial nitrogen fertilizers worldwide has ...
Human Impact On The Nitrogen Cycle
... Human impact on the nitrogen cycle is diverse ... Agricultural and industrial nitrogen (N) inputs to the environment currently exceed inputs from natural N fixation ... of anthropogenic inputs, the global nitrogen cycle (Fig ...
Aquarium Maintenance - Nitrogen Cycle - Maintaining The Nitrogen Cycle
... What hobbyists call the nitrogen cycle is only a portion of the complete cycle nitrogen must be added to the system (usually through food provided to the tank inhabitants), and nitrates accumulate in ... solutions Activated carbon filters absorb nitrogen compounds and other toxins, while biological filters provide a medium designed to enhance bacterial colonization ... New aquaria often have problems associated with the nitrogen cycle due to insufficient beneficial bacteria ...

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