Explain, giving one example, how co-extinction is one of the causes of loss of biodiversity. List the three other causes also (without description).
OR
Eutrophication is the natural aging of a lake. Explain.
When a species become extinct, the plant and animal species associated with it in an obligatory way also become extinct.
For example, when a host fish species extinct, its unique assemblage of parasites also meets the same fate as they don’t get a host body to exploit for their own needs.
Other causes of loss of biodiversity –
• Habitat loss and fragmentation
• Over exploitation
• Alien species invasion
OR
• Eutrophication is the natural aging of a lake by nutrient enrichment of its water.
• In a young lake, the water is cold and clear, supporting little life but with time, streams draining into the lake introduce nutrients such as Nitrogen and phosphorus.
• The nutrient enrichment encourages the growth of aquatic organisms like plants and animals and organic matter begin to be deposited on the lake bottom and keep on depositing for centuries.
• The lake thus becomes shallower with time. Eventually, lake gives way to large masses of floating plants, finally converting into land.
Couldn't generate an explanation.
Generated by AI. May contain inaccuracies — always verify with your textbook.
