Question

With the help of an example, explain how alien species invasion causes biodiversity loss.

Answer 1

Allen species are non -native species which when introduced, in a new area. They become invasive and compete with the native species and cause extinction of indigenous species. For example, Native to the Caspian and Black Seas, Zebra mussels (Dreissena polymorpha) affect fisheries, mollusc diversity, and electric power generation in the Great Lakes in North America and Mississippi basin.

Partheniun, Lantana and Eichhornia are the exotic species of plants that have invaded India and caused environmental damage.They pose threats to the survival of many of our native species.