Q. 34.1( 65 Votes )

Find out what do the terms ‘algal bloom’ and ‘red-tides’ signify.

Answer :

Algal bloom refers to the overgrowth and accumulation of algae population in freshwater and marine water bodies.
Not all algal blooms are harmful. The harmful algal blooms are known as HAB (Harmful algal blooms)
There are two major causes of algal blooms: high temperatures and nutrients runoff. (Fertilizers sprayed on crop get washed into the water bodies)

Red tides
Red tides are caused by excessive growth of harmful algal blooms.
These HABs are usually composed of red Dinoflagellates (Eg: Gonyaulax)
Provided optimum conditions, these red Dinoflagellates undergo rapid multiplication.
Due to this overgrowth, the watersurface appears red in colour. Hence, the name red tides.

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