Question

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

Answer 1

Answer:

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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 tidesRed 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....

Answer 2

Answer:

Explanation:

Algal bloom

Algal bloom refers to an increase in the population of algae or blue-green algae in water, resulting in discoloration of the water body. This causes an increase in the biological oxygen demand (BOD), resulting in the death of fishes and other aquatic animals.

Red-tides

Red tides are caused by red dinoflagellates (Gonyaulax) that multiply rapidly. Due to their large numbers, the sea appears red in colour. They release large amounts of toxins in water that can cause death of a large number of fishes.

Hope it helps you.....