The German naturalist and geographer Alexander von Humboldt observed that within a specific region, species richness increases as the explored area expands, but this relationship only holds true up to a certain limit.

•The Curve: When plotted on a graph (Species Richness vs. Area), the relationship forms a rectangular hyperbola.

•The Logarithmic Scale: On a log scale, this relationship appears as a straight line described by the equation: logS=logC+ZlogA (where S= species richness, A = area, Z= slope, and C=Y-intercept).

•The Limit: The "limit" refers to the fact that beyond a certain point, expanding the search area no longer significantly increases the number of new species discovered.