The accumulation of biomass increased with stand age, reaching,
respectively, 207.45 and 189.35 t ha1 in mature Eucalyptus and Acacia plantations. The contribution of
secondary biomass from the understory, litter layer and CWD accounted for, respectively, up to 10.2%
and 20.3% of the total biomass in the two types of plantation, highlighting the significance of secondary
biomass.