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प्रश्न
With the help of any one example explain Alien species invasion as one of the causes of Biodiversity losses.
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उत्तर
When a new species gets introduced into any ecosystem accidentally or intentionally, there are chances that it proves harmful for existing species. Sometimes, it can lead to extinction of local species.
In such a case, it is called as invasive species. One of the major reasons of such a harmful effect of alien species is lack of local predator.
- Introduction of predator fish - Nile perch in Lake Victoria proved deleterious for 200 local species of Cichlid fish.
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संबंधित प्रश्न
Accroding to IUCN Red list, the status of Antilope is ____________.
What are the major factors that are responsible for the loss of biodiversity? What steps are needed to prevent them?
Which of the following is not a cause for loss of biodiversity?
What does 'Red' indicate in the IUCN Red list (2004)?
What criteria should one use in categorizing a species as threatened?
Enlist two criteria that are used to identify a region for maximum protection as 'Biodiversity hotspots'.
Match the species in Column I with its category in Column II.
| Column I | Column II |
| A. Rare species | I. No species |
| B. Vulnerable species | II. Facing a high risk of extinction |
| C. Endangered species | III. Localised species |
| D. Extinct species | IV. Species under threat |
Choose the correct answer from the options given below.
The IUCN Red Data List (2004) in the last 500 years documents the extinction of nearly 784 species including ______.
Which one of the following groups faces maximum threat of extinction?
Give definitions of Invasive species.
