Fig. 4.

Relationship between aboveground biomass, (a) coefficient of variation of tree diameter at breast height (DBH CoV) (red dots indicate subtropical forests, green dots indicate subtropical karst forests, and blue dots indicate tropical forests) and (b) stand basal area across sites from different continents (the regression line is only fitted for the data of the present study; green dots). The plots from the literature that were larger than 1 ha have been marked with the plot area, and the rest are 1 ha plots; grey dots indicate Neotropical forests; purple dots indicate subtropical forests in China; and black dots indicate tropical forests in China.