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Elaborate how invasion by an alien species reduces the species diversity of an area.

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Elaborate how invasion by an alien species reduces the species diversity of an area.

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Some possible explanations are that the alien species may be:

  • Vigorously growing and compete with the natural plants for minerals, water etc. The less vigorous local species may be eliminated.
  • Natural pests and predators of the alien species may not be present in the introduced area-leading to proliferation in their number.
  • The introduced species may harm the local species by production of chemicals (Amensalism).
  • The alien species by proliferation may make conditions unfavourable for the growth of local native plants. (e.g., Eichhomia).
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