Economic importance of Cyanobacteria | HSEB botany notes

Cyanobacteria are both useful as well as harmful to mankind and other living organism on the planet. The economic importance of cyanobacteria are as follows :

1. Cyanobacteria like Spriulina are cultivated in tanks as a protein rich food for fish and other animals.

2. Some blue green algae like Lyngbia can be used as antibiotics.

3. Species of cyanobacteria can grow on the walls and roofs of building during rainybseason causing discoloration, corrosion and leakage.

4. Nostoc sp benefits a number of plants with which it is associated by fixing nitrogen.

5. Even large colonies of Nostoc sp are edible.

Harmful effects :

6. Some cyanobacteria like Microcystis form water bloom on the surface of water and produce toxin ,and ultimatley pollute the water. The toxin is harmful to most aquatic animals and even to human beings.

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