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प्रश्न
Discuss one example, based on your day-to-day observations, showing how loss of one species may lead to the extinction of another.
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उत्तर
In case a species (x) becomes extinct, the plant and animal species (M, N, O, Z) associated within an obligatory way also become extinct. For example.
- When a fish species which is a host for a number of parasites becomes extinct the parasite species which are uniquely dependent on the host fish will also become extinct.
- The insects may be polyphagous (feed on more than one plant species) or monophagous (feed on only one particular plant species) in nature. The monophagous insect species are valuable and may become extinct if the plant species upon which it feeds becomes extinct.
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संबंधित प्रश्न
Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?
Substantiate with the help of one example that in an ecosystem mutualists
are also one of the major causes of biodiversity loss.
Suggest two practices giving one example of each, that help protect rare or threatened species.
______ refers to the conservation of endangered species outside their natural habitats.
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?
What do you understand by ‘exotic species’?
What is common to the following plants: Nepenthes, Psilotum, Rauwolfia and Aconitum?
What is common to the species shown in figures A and B?
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| A | B |
Enlist two criteria that are used to identify a region for maximum protection as 'Biodiversity hotspots'.
Name any two biodiversity hot spots in India.
The species placed in CR category is ______.
Which of the following suits hotspots in ecological terminology?
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?
Which of the following regions of the globe exhibits highest species diversity?
These are regarded as major causes of biodiversity loss:
- Over exploitation
- Co-extinction
- Mutation
- Habitat loss and fragmentation
- Migration
Choose the correct option:
When one species becomes extinct and another species closely associated with it also disappears, this phenomenon is called:
In the IUCN classification, what does the category 'EW' stand for?
Which of the following animals is correctly categorised as 'Vulnerable' under the IUCN Red List?
Reduced biodiversity in an ecosystem leads to which of the following ecological effects?
