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pond scum

From: The Columbia Encyclopedia, Sixth Edition | Date: 2008

pond scum accumulation of floating green algae on the surface of stagnant or slowly moving waters, such as ponds and reservoirs. One of the commonest forms is Spirogyra.

Author not available, POND SCUM., The Columbia Encyclopedia, Sixth Edition 2008

The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press

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