Question

Algae prevent aquatic plants and animals from getting the above necessities. This leads to poor growth or death of aquatic species. Write down two ways inwhich eutrophication can be prevented.​

Answer 1

Algae lead to the death of aquatic species (eutrophication)

Explanation:

• Eutrophication occurs when the water body becomes enriched with nutrients .
• This leads to excessive growth of algae called algal blooms.
• Some algae can produce toxins that are harmful to higher forms of life
• This can cause problems along the food chain and affect any animal that feeds on them
• It is predominantly caused by use of nitrate and phosphate fertilizers, industrial waste into water bodies etc.
• Algal bloom leads to the increase in BOD as a result aquatic plants and animals may die.
• It can be prevented by reducing the source of nutrients , reducing fertilizers input, phosphate stripping at sewage treatment works , introducing buffer strips of vegetation adjacent to water bodies.