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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.
संबंधित प्रश्न
Give any 'two' examples of endangered species
Suggest two practices giving one example of each, that help protect rare or threatened species.
Dodo bird, stellar sea cow and passenger pigeon are few examples of extinction due to ______.
Match the following and choose the correct alternative.
| Column I | Column II | ||
| i. | Not evaluated | a. | Pervasive and abundant after careful assessment |
| ii. | Near threatened | b. | Information related to risk of extinction is lacking in some way |
| iii. | Least concern | c. | Described by scientist but not assessed by the IUCN |
| iv. | Data deficient | d. | May meet the criteria for threatened status in the near future |
Acronym for IUCN is ____________.
'The Evil Quartet' is a concept which describes the ______.
Which one of the following is a natural cause of extinction of flora and fauna?
Threatened species are those which ______.
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?
Which of the following statements is correct?
Which among the following forests is known as the "lungs of the planet earth"?
What is common to the following plants: Nepenthes, Psilotum, Rauwolfia and Aconitum?
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 is common to the species shown in figures A and B?
 |
 |
| A | B |
Discuss one example, based on your day-to-day observations, showing how loss of one species may lead to the extinction of another.
Explain the concept of "co-extinction" by taking two examples.
List any three major causes of loss of biodiversity.
"Forests provide intangible benefits to us." Explain by taking three different areas, how.
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 ______.
Red Data Book is maintained by ______.
Give definitions of Endangered species.
When one species becomes extinct and another species closely associated with it also disappears, this phenomenon is called:
Which of the following animals is correctly categorised as 'Vulnerable' under the IUCN Red List?
The Nile perch and African catfish are examples of biodiversity loss caused by:
Which of the following is a natural cause (rather than a human cause) of biodiversity loss?
