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  • Alien species invasion has been a threat to biodiversity. Justify with the help of a suitable example. List any other three causes responsible for such a loss.    

Alien species invasion has been a threat to biodiversity. Justify with the help of a suitable example. List any other three causes responsible for such a loss.

 

 

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Alien species are introduced and cause decline or extinction of indigenous species. When the Nile perch introduced into Lake Victoria in cast Africa results in the extinction of an ecologically unique assemblage of more than 200 species of cichlid fish in the lake.

Other invasive species are carrot grass (Parthenium), Lantana and water hyacinth. Introduction of African catfish Clarias for purpose of aquaculture causes a threat to the indigenous catfishes in the rivers.

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