Question

Which events are likely to be catastrophic to an ecosystem? Select 3 answers

Answer 1

B, D, and E.

the other three don't have a major effect

Answer 2

Answer: B. The introduction of a species that reproduces quickly.

D. An oil spill.

E. A volcanic eruption.

Explanation:

A catastrophic event is a event which has potential to cause damage to the environment and drastically affects the life of living beings.

Following are the catastrophic events for ecosystem:

B. The introduction of a species that reproduces quickly. : The new species will consume resources present in the ecosystem starving the native species of the ecosystem. This may lead to the extinction of the native species.

D. An oil spill: It will contaminate the water body. It will limit the supply of atmospheric oxygen hence, will result in oxygen defficiency in water. This will lead to decrease in population of the aquatic species or may lead to their extinction.

E. A volcanic eruption: It is likely to cause major damage as the volcanic lava when erupts it may create huge fire which can burn trees over a long distance from volcanic crator. This event may kill a large diversity of faunal and floral species of an ecosystem.