Biomass Crash

When converted to biomass, the inverse relationship between humans and non-human megafauna is evident (Fig. 12.3). Non-human megafauna biomass fell dramatically between 15.5 and 11.5 kyr B.P., concomitant with the initial steep rise in human biomass.

Summing the biomass calculated for humans and nonmegafauna species provides a way to track changes in overall megafauna biomass through time (Fig. 12.4). The results suggest that biomass loss from the early megafauna extinctions in Australia and the first pulse of extinc-

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