Advertisements
Advertisements
Question
What criteria should one use in categorizing a species as threatened?
Advertisements
Solution
The criteria that should be used in categorising a specials as threatened are
- Number of the members of the species is declining at an alarming rate.
- Their habitat is being modified or destroyed.
- Predator or poacher activities are increasing.
APPEARS IN
RELATED QUESTIONS
What are the major causes of species losses in a geographical region?
Substantiate with the help of one example that in an ecosystem mutualists
are also one of the major causes of biodiversity loss.
Dodo bird, stellar sea cow and passenger pigeon are few examples of extinction due to ______.
Enlist any six categories into which a given species is placed once it has been thoroughly evaluated by IUCN.
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 an exception to invasive species?
Match the following columns.
| Column - I | Column - II |
| (i) Dodo | (a) Africa |
| (ii) Ouagga | (b) Russia |
| (iii) Thylacine | (c) Mauritius |
| (iv) Stellar's sea cow | (d) Australia |
Choose the correct match from the following
What does 'Red' indicate in the IUCN Red list (2004)?
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.
Though the conflict between humans and wildlife started with the evolution of man, the intensity of conflict has increased due to the activities of modern man. Justify your answer with suitable examples.
Name any two biodiversity hot spots in India.
Western Ghats have a large number of plant and animal species that are not found anywhere else. Which of the following terms will you use to notify such species?
Decline in the population of Indian native fishes due to introduction of Clarias gariepinus in river Yamuna can be catogoriesd as ______.
What is ex-situ conservation?
Mention any two places where the ex-situ conservation is undertaken.
Give definitions of Endangered species.
Damage to biodiversity takes place due to natural reasons which includes the following EXCEPТ:
When one species becomes extinct and another species closely associated with it also disappears, this phenomenon is called:
The Nile perch and African catfish are examples of biodiversity loss caused by:
