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dystrophic
(english) A type of lake in cold climates with low productivity, limited photosynthesis, scarce phytoplankton, carbon dioxide high and with hypoliminion oxygen depleted. Calcium, phosphorous and nitrogen scanty. Basin deep to shallow, found in boggy areas or mountains, with yellow to brown color and fairly abundant littoral vegetation. Generally transforms into a peat bog as organic materials accumulate because of only partial decomposition. Also used to refer to species inhabiting such lakes. (See also: productivity, photosynthesis, hypolimnion)

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