Q. Some of the phenomenon can be very harmful for the health of the ecosystem. Which of the following scenarios will lead to a Negative change to an ecosystem?
1.Occurrence of frost in the Place having lot of budding plants and flowers
2.Around thousands of Siberian cranes resting for around a week at a large lake during their annual migration.
3.Failure of a large old dam led to flooding of nearby fields, vegetated by grasses, herbs, and other non-woody plants.
Select the correct answer from below
Answer: A
Notes:
Seasonal weather fluctuations, such as a frost, may put stress on organisms in an ecosystem.
An annual migration occurs every year, which means the event is likely part of normal ecosystem functioning and is largely beneficial for the health of the ecosystem.This makes statement b wrong.
Ecological disturbances, such as flooding, can alter an ecosystem so much that the ecosystem will no longer return to its original state.
Source- Article
