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Chapter: Biodiversity, Conservation and Environmental Issues· Biology

Identify ‘A’ from the graph given below showing species area relationship :[Graph: Species richness on the Y-axis and Area on the X-axis. A curve rises steeply and then levels off; ‘A’ points to this curve. A straight line labelled “Log-log scale” is…

Q.2 (v) Identify ‘A’ from the graph given below showing species area relationship :
[Graph: Species richness on the Y-axis and Area on the X-axis. A curve rises steeply and then levels off; ‘A’ points to this curve. A straight line labelled “Log-log scale” is drawn below it, marked log S = log C + Z log A.]

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Answer: A is a rectangular hyperbola (the species-area curve on an arithmetic scale).

Within a region, species richness increases with explored area only up to a limit, giving a rectangular hyperbola, \(S = CA^{Z}\). On a log-log scale the same relation becomes a straight line, \(\log S = \log C + Z \log A\) (Alexander von Humboldt).

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