Question

Draw a graph showing the species-area relationship. Name the naturalist who studied such a relationship. Write the observation made by him.

Answer 1

The graph of the species-area relationship shows how the number of species rises as the investigated area increases. Alexander von Humboldt, a naturalist, researched it.

Observations made by Alexander von Humboldt are as follows:

1. Only to a limited extent does species richness rise with the investigated area. The relationship is represented by a rectangular hyperbola, described by the equation: S = CA^Z_'

Where:

S = Species richness

A = Area

C = Constant

Z = Regression constant

2. Usually, the graph displays a curve that rises sharply initially before leveling out, indicating that expanding the area does not, after a certain point, result in a noticeably higher number of species.

3. Logarithmic scale: The equation log S = log C + Z log A represents the relationship as a straight line on a logarithmic scale.

4. Slope (Z): The value of Z varies depending on the area and taxa studied.

Z typically ranges between 0.1 and 0.2 for small areas. Z can range from 0.6 to 1.2 for larger regions, such as entire continents.