Question

Introduction of alien species into new area poses a threat to extinction of indigenous species due to

Answer 1

Answer:

In the absence of their natural predators, exotic species flourish better and pose a threat to indigenous species.

Answer 2

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✦ When alien species are introduced deliberately for whatever purposes, some of them turn invasive and causes decline for the extinction of indigenous species.

For eg:-

• Nile perch introduced into Lake Victoria in the east Africa led eventually of ecologically unique assemblage of more than 200 species of Cichild fish in the lake.
• Carrot grass , Lantana and Water hyacinth are other such examples.

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