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Table 2 Descriptive data of inventory plots (USA)

From: Tree species richness enhances stand productivity while stand structure can have opposite effects, based on forest inventory data from Germany and the United States of America

  R d dq CVd SDI Temp Precip P
mean 4.67 19.91 21.97 0.44 522.63 11.56 1055.95 6.22
sd 2.82 8.17 8.81 0.19 464.31 5.6 357.02 0.64
se 0 0.01 0.01 0 0.61 0.01 0.47 0
min 1 7.11 7.11 0 0.16 −2.88 56 4.01
max 21 169.93 169.93 1.9 4998.34 24.57 3353 8.02
n 576,415
  1. R number of species, d diameter at breast height (cm), dq quadratic mean diameter (cm), CVd coefficient of variation of diameter, SDI stand density index, Temp mean annual temperature, Precip annual precipitation, P stand productivity (m3∙ha−1∙yr.−1)