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प्रश्न
Write the inference drawn by Alexander von Humboldt after his extensive explorations of South American jungle.
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उत्तर
Alexander von Humboldt observed that within a region species richness increased with increasing explored area, but only up to a limit. In fact, the relation between species richness and area for a wide variety of taxa (angiosperm plants, birds, bats, freshwater fishes) turns out to be a rectangular hyperbola.
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?
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.
Which of the following hypothesis states: Rich species diversity leads to lesser variation in biomass production over a period of time.
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?
There is greater biodiversity in tropical /subtropical regions than in temperate region. Explain.
Is it true that there is more solar energy available in the tropics? Explain briefly.
Study the graph given below:
As per Alexander von Humboldt, what do the symbols S, A, Z and C in the graph stand for, in respect of a species and area relationship?
The species-area relationship is represented on a log scale as ______.
