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Question
The table given below shows the Area, Y-intercept and regression coefficient of the continents namely, Africa and Europe. Study the table carefully and answer the questions that follow:
| Africa | Europe | |
| Area (A) | 62,000 km sq. | 65,000 km sq. |
| Y-intercept | (C) 10 | 20 |
| Regression coefficient (Z) |
1 | 1 |
- Calculate the species richness (S) of each continent.
- Which of these continents shows a higher biodiversity?
- State any two factors that cause an increase in biodiversity.
Solution
(i) The formula for species richness with Y-intercepts is
logS = logC + ZlogA
where S is species richness.
C is the Y-intercept.
Z is a regression coefficient.
A is area.
- Here, in Africa
Log S = log 10 + 1 · log 62000
log S = 1 + 4.79
Log S = 5.79
S = e5.79
S = 327.01
species richness is 327.01
- Here, in Europe
Log S = log 20 + 1 · log 65000
log S = 1.3 + 4.81
Log S = 6.11
S = e6.11
S = 450.33
species richness is 450.33
(ii) In Africa biodiversity is higher.
(iii) Several factors influence species diversity. There are two of them: habitat diversity and genetic diversity.
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