654672.fig.003
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.