Figure 3: Distribution of chemical energy among diverse chemical repositories j, that is, species according to (6). The probability density
of species-area curve is characteristically skewed toward rarity at high-energy
trophic levels j. The integral of
sums up all matter that is distributed among populations of all species s in an ecosystem. When the total matter
is taken proportional to the area A, the
species-area relationship is obtained as the cumulative curve.