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प्रश्न
Of the four major causes for the loss of biodiversity (Alien species invasion, habitat loss and fragmentation, over-exploitation and co-extinctions which according to you is the major cause for the loss of biodiversity? Give reasons in support.
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उत्तर
Habitat loss and fragmentation is the most important cause driving animals and plants to extinction. The most dramatic examples of habitat loss come from tropical rainforests. Once covering more than 14 per cent of the earth’s land surface, these rainforests now cover no more than 6 per cent. They are being destroyed fast. By the time you finish reading this chapter, 1000 more hectares of rainforest would have been lost. The Amazon rain forest (it is so huge that it is called the ‘lungs of the planet’) harbouring probably millions of species is being cut and cleared for cultivating soyabeans or for conversion to grasslands for raising beef cattle.
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संबंधित प्रश्न
Suggest two practices giving one example of each, that help protect rare or threatened species.
Acronym for IUCN is ____________.
Species that possess a high risk of extinction with very few surviving members (50) are categorised as ____________ by the IUCN.
Which among the following is a TRUE statement?
Currently, ______ mass extinction is considered to be the progressing at an alarming rate due to the loss of biodiversity.
Accroding to IUCN Red list, the status of Antilope is ____________.
Which one of the following is a natural cause of extinction of flora and fauna?
Which of the following statements is correct?
Which among the following forests is known as the "lungs of the planet earth"?
Which of the following is/are endangered plant species?
Which of these is NOT amongst the effects of loss of biodiversity?
What could have triggered mass extinctions of species in the past?
What is common to the species shown in figures A and B?
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| A | B |
There was a loss of biodiversity in the ecosystem due to a new construction project in that area. What would be its impact on the ecosystem? State any three.
List any three major causes of loss of biodiversity.
Enlist two criteria that are used to identify a region for maximum protection as 'Biodiversity hotspots'.
Consider the following statements:
- Statement I: Endemism and accelerated habitat loss are characteristics of biodiversity hotspots.
- Statement II: Gene bank is an in-situ method of biodiversity conservation.
Choose the correct answer from the options given below.
Decline in the population of Indian native fishes due to introduction of Clarias gariepinus in river Yamuna can be catogoriesd as ______.
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.
Give definitions of Endangered species.
