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प्रश्न
What characteristics make a community stable?
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उत्तर
Characteristics that make a community stable are:
- A stable community should not show too much variation in productivity from year to year
- It must be either resistant or resilient to occasional disturbances (natural or man-made)
- It must also be resistant to invasions by alien species.
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संबंधित प्रश्न
How is biodiversity important for ecosystem functioning?
According to David Tilman, greater the diversity, greater is the primary productivity. Can you think of a very low diversity man-made ecosystem that has high productivity?
Can you think of a scientific explanation, besides analogy used by Paul Ehrlich, for the direct relationship between diversity and stability of an ecosystem?
Explain briefly the ‘rivet popper hypothesis’ of Paul Ehrlich.
Match List I with List II-
| List-I | List-II |
| A. Robert May | I. Species-Area relationship |
| B. Alexander von Humboldt | II. Long term ecosystem experiment using outdoor plots |
| C. Paul Ehrlich | III. Global species diversity at about 7 million |
| D. David Tilman | IV. Rivet popper hypothesis |
Choose the correct answer from the options given below:
Identify the INCORRECT statement.
Among ‘The Evil Quartet’, which one is considered the most important cause driving extinction of species?
Which characteristic of an ecosystem is ensured by high species diversity, resulting in consistent year-to-year biomass productivity?
According to David Tilman's long-term outdoor plot experiments, what significant observation was made about species-rich communities regarding total biomass variation?
How do diverse ecosystems respond to natural or man-made disturbances?
In Paul Ehrlich's Rivet Popper Hypothesis, what does an ecosystem represent?
According to the Rivet Popper Hypothesis, what do individual species represent in the ecosystem?
What does Tilman's research directly link to higher overall ecosystem productivity?
