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Table 1 Abundances and demographic rates in the 50 ha plot in eight censuses, or seven census intervals (rates appear beneath the second census of an interval)

From: Demographic trends and climate over 35 years in the Barro Colorado 50 ha plot

Demographic measure Category 1982 1985 1990 1995 2000 2005 2010 2015
Observed individual density (ha −1) Sapling 4285.1 4424.1 4453.7 4149.8 3849.8 3748.7 3726.9 3734.8
  Tree 416.1 412.9 423.5 428.0 422.8 416.0 414.6 415.3
Median species abundance (50 ha) Observed sapling 135.0 115.0 109.5 99.0 90.0 90.5 104.5 104.5
  Fitted sapling 134.0 126.2 114.8 105.3 101.3 105.2 109.2 113.5
  Observed tree 31.0 30.0 28.5 27.5 29.5 30.5 29.0 30.0
  Fitted tree 31.3 31.1 30.9 30.7 30.4 30.1 29.9 29.6
Mortality rate (% ·yr −1) Observed sapling   2.64 2.24 2.55 2.81 2.36 2.37 2.44
  Fitted sapling   4.81 4.76 4.70 4.65 4.61 4.57 4.54
  Observed tree   2.73 1.95 1.87 2.08 2.29 2.26 2.46
  Fitted tree   3.27 2.60 2.49 2.63 2.78 2.92 3.07
Median growth rate (mm ·yr −1) Observed sapling   1.18 0.98 0.62 0.60 0.60 0.61 0.78
  Fitted sapling   1.17 0.82 0.50 0.58 0.67 0.78 0.89
  Observed mid-sized tree   1.70 1.34 1.04 1.00 1.01 1.00 1.16
  Fitted mid-sized tree   1.80 1.44 1.14 1.21 1.29 1.37 1.45
  Observed large tree   5.69 3.56 2.74 2.80 2.78 2.66 2.75
  Fitted large tree   6.05 3.70 2.76 2.82 2.88 2.94 3.00
  1. Observed medians of species abundances are based on all species in each category used in the modeling (see Methods). Fitted median abundances (the fixed effect) are from the piecewise hierarchical model. Because species was a random effect, the fixed effect is the mean of all species medians