pond scum

The Columbia Encyclopedia, Sixth Edition | 2008 | Copyright

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.

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pond scum
Book article from: The Columbia Encyclopedia, Sixth Edition 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.
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