Question

Expalin how Water hyacinth increases the Biological Oxygen Demand leading to the death of aquatic plants and animals?

Answer 1

• Water hyacinth (Eichhornia crassipes) is a very charming plant. It is called as ‘Cindrella of the plant kingdom’.
• It covers entire surface of the water resources like ponds and lakes.
• It will not allow the light to penetrate into the water and increases the Biological Oxygen Demand leading to the death of aquatic plants and animals.
• It also alters the water clarity and decreases phytoplankton production, dissolved oxygen, nitrogen, phosphorus and heavy metals.