Light and Temperature Effects of Eutrophication

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Light and Temperature Effects of Eutrophication

	Light and Temperature Effects of Eutrophication -The intensity of light and the prevailing temperature in the aquatic habitats also affect the algal groups. A wide range of temperature is required by different algal groups. In spring and in early summer, when the temperature is low, diatoms dominate. During summer when the temperature is high blue green algae dominate. Their dominance is also favoured by their toxin production which inhibits other algal forms.
EFFECTS OF EUTROPHICATION: The main effect associated with eutrophication is the algal bloom which leads to further problems in a water body. Algal toxins: Many algae produce potent toxins. Gonyaulux and other dinoflagellates produce toxins which are poisonous to aquatic lives such as fish. A notable disease is paralytic shell fish poisoning. Toxigenic blue green algae like Anabaena, Microcystis and Nostoc have also been noted whose toxins can kill fish. The toxin may also contaminate the drinking water supplies.
Taste and odors: Musty tastes and odors in drinking water may be associated with blue green algae. An earth smelling organic compound, known as geosmin, has been produced by the blue green algae Symploca muscorum and Ociallatoria tenuis. Other blue green algae that produce odors and tastes are Anabaena and Synura.