Nitrogen Gas - Understanding Lake Data

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Nitrogen comprises 78% of the gas in the atmosphere. Like other gases, it is more soluble at cooler temperatures. Most aquatic plants do not derive nutritional value from nitrogen gas, though blue-green algae is an exception. Nitrogen gas is important in lakes containing such algae.

Some bacteria convert nitrate back to nitrogen gas under anaerobic conditions when soluble organic matter is present. This reaction, called denitrification, is one of the main ways nitrogen is lost from certain lakes and some soils. This reaction is being investigated as a means of reducing pollution from septic systems.

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For more information on this topic, contact:

James Vennie
Watershed Management
(608) 266-2212


Lakes Partnership | Watershed Management | Fish Wisconsin | Fisheries Management

Last Revised: Thursday January 25 2007