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Scenedesmus
Scenedesmus Meyen : Scenedesmaceae.
Geen algae. Very common free-floating, colony-forming algae. They are visible as a bloom, causing water of ponds and still, enclosed, areas to look bright green to grayish- or olive-green. They do not produce clumps, strands, or plant-like structures and usually do not form surface scums or films. Scenedesmus can be identified under the microscope as rectangular colonies of a few cells in multiples of two, usually from 2 to 8 (up to 32), that have joined together side by side in a single plane; they may have stiff spines on each "corner" but do not have flagella. Abundant in all water, especially where nutrients are high, and found floating among other vegetation. Blooms occur in response to high nutrient levels, most often at the end of spring and the beginning of summer. Can contribute to taste and odor problems in water.
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