Table 1. Stand carbon dynamics above ground wood in trees >10 cm DBH, for the three sites
Sites Stem frequency, stem·ha–1 Biomass C, Mg·ha–1 C added through annual diameter increment at stand level, Mg·ha–1·year–1 Mean residence time, years Mean biomass (C) age, years Mean tree age, years Percent of trees >300 years old
Manaus 626 180 1.9 95 109* 119 92 381* 422 297 50* 50 45
Rio Branco 466 95 2.6 37 89* 103 76 279* 332 219 32* 38 27
Santarém 460 141 2.6 54 63* 80 59 195* 255 153 18* 27 17
  • From biomass/C storage rate.

  • * Used 0.65 times the standard deviation of the lognormal distribution (as in ref. 39) when randomly assigning growth rates; minimum growth rate cutoff was 0.02 cm·yr–1

  • Used 1.0 times the standard deviation of the lognormal distribution when randomly assigning growth rates; minimum growth rate cutoff was 0.02 cm·yr–1

  • Used 0.65 times the standard deviation of the lognormal distribution; minimum growth rate cutoff was 0.04 cm·yr–1