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प्रश्न
Is it possible that productivity and diversity of a natural community remain constant over a time period of, say one hundred years?
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उत्तर
No, it is not possible that productivity of a natural community remain constant over a certain time period.
This is because
- The natural habitat is never maintained in real.
- Abundant resources are never available, they are always in short supply or just enough.
- Environment conditions for survival and reproduction are continuously changing.
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संबंधित प्रश्न
The following graph shows the species-area relationship. Answer the following questions as directed.
(a) Name the naturalist who studied the kind of relationship shown in the graph. Write the observations made by him.
(b) Write the situations as discovered by the ecologists when the value of ‘Z’
(Slope of the line) lies between:
- 0.1 and 0.2
- 0.6 and 1.2
What does ‘Z’ stand for?
(c) When would the slope of the line ‘b’ become steeper?
Short answer type question
Tropical regions exhibit species richness as compared to polar regions. Justify.
Extent of global diversity of invertebrates is shown in the pie diagram below. Choose the most appropriate alternative that the four portions (a-d) represent.
All are true regarding graph showing species richness - area relationship, EXCEPT ______.
Which of the following is an observation of Alexander von Humboldt's documented pattern in ecology?
Species richness - area relationship is given by ______.
Which of these is true about tropical environments?
Which of the following countries has the highest biodiversity?
Which one of the following is not a major characteristic feature of biodiversity hot spots?
There is greater biodiversity in tropical /subtropical regions than in temperate region. Explain.
Lesser variation in biomass production over a period of time is called ______.
The species-area relationship is represented on a log scale as ______.
The relation between species richness and area for a wide variety of taxa appears as ______.
Who observed that within a region, species richness increased with increasing explored area, to a certain limit?
Which of the following characteristics are seen in a stable community?
- It is strong enough to withstand environmental disturbance and recovers quickly.
- It is resistant to invasive species.
- It exhibits constant change in biomass production over a period of time.
- It has more species diversity.
Which of the following statements correctly describes the relationship between latitude and biodiversity?
Alexander von Humboldt developed observations leading to the discovery of which relationship in ecology?
In the species-area relationship formula log S = log C + Z log A, what does the variable A represent?
