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Definition of Terms
There is a lot of technical terms on the Rivers and Streams website. This page is designed to help navigate and define these words and phrases. Use the line below to skip to a certain letter.
not derived from living organisms.
The gradual addition of new land to old by the deposition of sediment carried by water.
An increase in the acidity of an ecosystem, caused by natural processed or acid deposition.
A measure of hydrogen ion concentration with a pH less than 7.0. See pH.
Rain having a pH of less than 7.0 can be considered acidic and if it has a pH low enough can potential threaten the life or well-being of vegetation or aquatic systems.
To enhance the oxygen concentration of water.
Life processes occurring only in the presence of molecular oxygen.
The geological process in which inorganic materials carried downstream are deposited in streambeds, floodplains, and other water bodies resulting in a rise in bottom elevation. Compare with degradation.
A measure of hydrogen ion concentration with a pH more than 7.0. See pH.
Acid-neutralizing capacity of water usually due to carbonates, bicarbonates, and hydroxides.
Related to material deposited by running water.
A life history strategy of fishes that includes migration between fresh- and saltwater. Reproduction occurs in freshwater while growth occurs in the ocean. Compare with catadromous, diadromous, and potamodromous.
Life processes that occur in the absence of molecular oxygen.
A lack of oxygen.
A term to characterizing growing, living in, frequenting, or pertaining to water.
An underground layer of earth that contains water or allows for its passage.
Microscopic organisms growing on the bottom of other substrates
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