Species (s) versus area (A) relationship (black) is a cumulative
curve of nonequilibrium stationary-state distribution of chemical energy in an
ecosystem. The total amount of base constituents N in the system is taken proportional to the area A. The cumulative curve follows mostly
the power law (green) but at large areas the logistic form (blue) accounts
better for the statistical series. The units on axes depend on the energetics
given by γ, units of measurements, and
proportionality constants.
