. Cottage country : an environmental manual for cottagers. Cottages; Vacation homes; Environmental protection; Pollution. W lu-n ihu lake mixes in the fall, these nutrients beeome available for aljjae in the surface waters, and dense algae growths can result Consequently, lakes that ha\e no oxygen in the bottonnvaler during the summer are more prone to having algal problems and are more vulnerable to nutrient inputs. Algae Problems Associated with Nutrient Enrichment When algae become so abundant that they create visible shoreline scums, slime or ooze, then they are a nuisance impairing the wa
. Cottage country : an environmental manual for cottagers. Cottages; Vacation homes; Environmental protection; Pollution. W lu-n ihu lake mixes in the fall, these nutrients beeome available for aljjae in the surface waters, and dense algae growths can result Consequently, lakes that ha\e no oxygen in the bottonnvaler during the summer are more prone to having algal problems and are more vulnerable to nutrient inputs. Algae Problems Associated with Nutrient Enrichment When algae become so abundant that they create visible shoreline scums, slime or ooze, then they are a nuisance impairing the water for recreational, domestic and esthetic pursuits. Microscopic blue-green algae (a component of the phytoplankton) which grow throughout the lake may become buoyant and concentrate at the surface of the water during quiet weatlier. A sliglit onshore breeze can concentrate this buoyant accumula- tion so that it forms a pea-green scum which fouls beaches as it piles along the shoreline. Filamentous green algae, such as Spirog]ra and Cladopbora. can create large cottony tufts or clouds that are suspended in the w ater or attached to suitable substrates such as rocks, logs and other rooted vegetation. When these masses break loose during storms, they can be blown to shore along with any other debris in the lake. There they may accumulate in thick mats that rapidly decompose creating a foul-smelling black ooze. Less noticeable, but equally upsetting, are microscopic algae capable of imparting chemical tastes and odors to water. The algae may not be large or abundant, but the odors (cucumber, grassy musty, fish}, rotten cabbage, etc.) they impart may make the water unpalatable for washing, cooking or drinking. Foaming conditions obsened along many lakeshores in the cottage country are usually the result of the release of emulsifving agents in aquatic plants and algae during the natural decomposition process. Wind and wave action will cause some shoreline foaming. Some foaming may
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