| Comments |
P.1243092-1 right column 4th paragraph: "Second, the RAD [rank-abundance distribution] suggests that just 227 (1.4%) of the estimated 16,000 species account for half of all individual trees in Amazonia. [Investigators] refer to these species, all of which have estimated populations of >3.7×10^8 trees, as hyperdominant species (see a list of the 20 most abundant species in Table 1 and a full list in appendix S1). These hyperdominant species form the basis of the tree communities in individual plots as well, accounting for a median of 41% of trees (range = 0 to 94%, fig. S9) and 32% of species (range = 0 to 78%) per plot (fig. S9)." P.2 left column bottom paragraph: "Fourth, there are strong similarities between theoretical models of tree species richness in the Amazon (ref 1) and [investigators'] distribution of species abundances based on empirical data. For example, Hubbell et al. (ref 1) used a log-series distribution
to predict that the most common species in the Amazon should account for 1.39% of all trees. This is very close to [their] estimate for the most
common species in [their] data set, the palm Euterpe precatoria (1.32%)." See note above table |