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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
Observe the graph and select the correct option:
Which of the following hypothesis states: Rich species diversity leads to lesser variation in biomass production over a period of time.
Latitudinal and altitudinal gradient is shown by which of the following habitat(s)?
In the equation: log S = log C + Z log A , S= species richness; Z = slope of line (regression coefficient); A = area; C = Y intercept. For smaller area, the value of Z ranges from ____________.
Species richness - area relationship is given by ______.
Which of these is true about tropical environments?
Which one of the following is not a major characteristic feature of biodiversity hot spots?
A species-area curve is drawn by plotting the number of species against the area. How is it that when a very large area is considered the slope is steeper than that for smaller areas?
Given below is an equation describing the Species-Area relationship between species richness and area for a wide variety of taxa as angiosperm plants, birds, bats etc. S = CAz
- Give a graphical representation of the given equation showing Species-Area relationship.
- What does 'S' represent in the given equation?
- What is the value of 'Z' (regression coefficient) for frugivorous birds and mammals in the tropical forests of different continents?
Lesser variation in biomass production over a period of time is called ______.
The species-area relationship is represented on a log scale as ______.
For frugivorous (fruit-eating) birds and mammals in the tropical forests of different continents, the slope of the species-area relationship is found to be approximately ______.
The relation between species richness and area for a wide variety of taxa appears as ______.
Which of the following hypothesis suggests that ecosystems are like aeroplanes where flight safety (ecosystem functioning) may or may not be compromised, depending upon which species are being lost?
Alexander von Humboldt observed that, within a region species richness ______ with increasing explored area.
Rivet Popper Hypothesis is an analogy to explain the significance of ______.
Tropical regions show greatest level of species richness because -
- Tropical latitudes have remained relatively undisturbed for millions of years, hence more time was available for species diversification.
- Tropical environments are more seasonal.
- More solar energy is available in tropics.
- Constant environments promote niche specialization.
- Tropical environments are constant and predictable.
Choose the correct answer form the options given below:
