Fig. 2

Nodulating Leguminosae (A), all Leguminosae (B), and all tree and large shrub species (C) biomass in young and old stands of tropical forests under different environmental conditions in Northeast Brazil. Bars topped by the same small letter, comparing young and old stands in the same forest, and by the same capital letter, comparing young or old stands of the different forests, are not significantly different by the LSD test at a 0.05 probability level