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प्रश्न
What are the major causes of species losses in a geographical region?
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उत्तर
The major causes of species losses (also known as ‘The Evil Quartet’) are as follows:
- Habitat Loss and Fragmentation: Destruction of natural homes due to human activities (e.g., cutting forests).
- Over-exploitation: When human need turns into greed, leading to over-use of resources.
- Alien species invasions: Introduction of non-native species that threaten local species.
- Co-extinctions: Extinction of a species leading to the extinction of other species dependent on it.
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संबंधित प्रश्न
Species that possess a very high risk of extinction due to rapid population decline of about 50 - 70 % over three generations is designated as ______.
______ refers to the conservation of endangered species outside their natural habitats.
Species that possess a very high risk of extinction due to population decline of about 30 - 50 % over past 10 years are categorized as _______.
The Red List of threatened species is published by ______.
Which among the following is/are the type( s) of extinction of species?
Which among the following is an exception to invasive species?
Which one of the following is a natural cause of extinction of flora and fauna?
What is common to lantana Eichhomia and African catfish?
The extinction of passenger pigeon was due to ______.
What does 'Red' indicate in the IUCN Red list (2004)?
Explain as to how protection of biodiversity hot spots alone can reduce up to 30% of the current rate of species extinction.
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'.
Name any two biodiversity hot spots in India.
What is the sustainable use of resources?
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.
The sixth extinction in progress currently is different from all previous extinctions on earth as it is ______.
Give definitions of Invasive species.
Name any two factors responsible for the loss of biodiversity in a geographical region.
Match List - I with List - IІ.
| List - I | List - II |
| A. The Evil Quartet | I. Cryopreservation |
| B. Ex-situ conservation | ΙI. Alien species invasion |
| C. Lantana camara | III. Causes of biodiversity losses |
| D. Dodo | IV. Extinction |
Choose the option with all correct matches.
Which type of extinction is characterised by species disappearing through natural environmental changes or evolutionary processes over a slow, long-term period?
The current global biodiversity crisis is described as an ongoing mass extinction with extinction rates estimated to be how many times higher than earlier natural rates?
In the IUCN classification, what does the category 'EW' stand for?
Which IUCN category describes species facing an 'extremely high risk of extinction in the immediate future'?
Which of the following animals is correctly categorised as 'Vulnerable' under the IUCN Red List?
Which of the following species pairs are examples of 'Extinct in the Wild' (EW) category?
Which of the following is an example of a species in the 'Least Concern' (LC) IUCN category?
Which of the following sets correctly lists all extinct (EX) species mentioned in the IUCN classification?
