Correct option(c) species area relationships
Explanation
Alexander von Humbolt was a great German naturalist and geographer. He did extensive explorations in the wilderness of South American forests, He established a species-area relationship. He observed that with rn a region, species richness increase with increasing explored area, but up to a certain limit. In fact, the relationship between species richness and area for a variety of taxa turns out to be a rectangular hyperbola as shown in figure below.
Note that on log scale the relationship becomes linear.
On a logarithmic scale, the relationship is a straight line described by the equation.
log S=log C+ Z log A
where,
S = Species richness
A = Area
Z = Slope of the line (regression coefficient)
C = Y-intercept
