Fig. 1: Variation in wood density across South American tropical forests.
From: Variation in wood density across South American tropical forests

a Location of forest inventory plots where wood density was quantified. b Variation in basal-area weighted wood density between regions. Colours in a relate to regions in (b). N = 981 plots (Lowland-NW = 182 plots, Lowland-SW = 168, East-central Amazon = 205, Guiana Shield = 123, Brazilian Shield = 119, Atlantic forest = 69, Andes = 71, Dry forests = 44). Black points show mean values in each region estimated by a linear model with wood density as the response variable and region as the explanatory variable; lines show 95% confidence intervals from that model.