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प्रश्न
What is the significance of the slope of regression in a species-area relationship?
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उत्तर
The slope of regression measures the rate at which species richness increases as the explored area expands. Its significance is explained below:
- For Small/Limited Areas: For a limited region like a country, the value of the slope remains constant and ranges from 0.1 to 0.2, regardless of the taxonomic group or the geographic region.
- For Large Areas: When measuring the species-area relationship over vast areas, such as entire continents, the regression slope becomes much steeper, typically ranging from 0.6 to 1.2. This indicates that larger areas support a much higher rate of species accumulation.
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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?
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.
Maximum species richness is observed in the ______.
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 ____________.
All are true regarding graph showing species richness - area relationship, EXCEPT ______.
The graph of species richness and area for a number of taxa like angiospermic plants, freshwater fishes, and birds is found to be ______.
Oxygen dissociation curve for Myoglobin has the following shape:
Amongst the animal group given below, which one has the highest percentage of endangered species?
Which of the below mentioned regions exhibit lees seasonal variations?
Which of these is true about tropical environments?
The pattern of biodiversity is affected by ______.
"Species richness increased with increased explored area but only a limit". This statement was given by.
Which of the following countries has the highest biodiversity?
What does the term ‘Frugivorous’ mean?
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?
Is it possible that productivity and diversity of a natural community remain constant over a time period of, say one hundred years?
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.
Species diversity decreases as we move away from the equator towards the poles. What could be the possible reasons?
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?
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 ______.
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?
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.
