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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
Give any 'two' examples of endangered species
Very short answer type question
What do you understand by the EW category of a living being?
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.
The Red List of threatened species is published by ______.
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'The Evil Quartet' is a concept which describes the ______.
What do you understand by ‘exotic species’?
What are the major factors that are responsible for the loss of biodiversity? What steps are needed to prevent them?
What is common to lantana Eichhomia and African catfish?
Which of these is NOT amongst the effects of loss of biodiversity?
What could have triggered mass extinctions of species in the past?
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.
Discuss one example, based on your day-to-day observations, showing how loss of one species may lead to the extinction of another.
List any two major causes other than anthropogenic causes of the loss of biodiversity.
How many Biodiversity hotspots have been identified around the world?
Enlist two criteria that are used to identify a region for maximum protection as 'Biodiversity hotspots'.
Gametes of threatened species can be preserved in viable and fertile conditions for long periods using ______.
When a species goes extinct in one area, it is often desirable to re-introduce the species from other populations. A major problem with this approach is that ______.
Decline in the population of Indian native fishes due to introduction of Clarias gariepinus in river Yamuna can be catogoriesd as ______.
Mention any two places where the ex-situ conservation is undertaken.
Red Data Book is maintained by ______.
The sixth extinction in progress currently is different from all previous extinctions on earth as it is ______.
Give definitions of Endangered species.
Write any three criteria on which different types of reflexes are based.
What are the reasons for loss of biodiversity?
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.
