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Table 3 Simulation results, maximum displacement 3m

From: Can plasticity make spatial structure irrelevant in individual-tree models?

   Flat efficiency Decreasing efficiency
  Plasticity a=1 a=2 a=1 a=2
   α α=1 α α=1 α α=1 α α=1
Jack pine
Regression R2 No 0.61 0.66 0.55 0.47 0.68 0.67 0.60 0.48
  Yes 0.94 0.94 0.88 0.79 0.96 0.94 0.93 0.82
Residual S.E. No 3.5 2.3 2.7 2.2 1.8 1.0 1.6 1.2
  Yes 1.1 0.8 1.2 1.3 0.6 0.4 0.6 0.8
Clark-Evans index No 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8
  Yes 1.3 1.1 1.4 1.4 1.3 1.1 1.4 1.4
Assimilation / m 2 No 0.64 0.64 0.58 0.58 0.41 0.30 0.41 0.35
  Yes 0.69 0.67 0.68 0.68 0.49 0.33 0.52 0.45
Assimilation / tree No 7.3 7.4 6.7 6.7 4.8 3.4 4.7 4.0
  Yes 7.9 7.7 7.9 7.8 5.6 3.8 6.0 5.2
% with assim. 0 No 12.3 0.0 4.6 0.0 12.3 0.0 4.6 0.0
  Yes 4.2 0.0 1.9 0.0 4.6 0.0 1.1 0.0
Mean displacement (m) Yes 1.7 1.6 1.7 1.6 1.6 1.5 1.7 1.6
% at disp. bound Yes 52 48 57 50 52 43 54 51
Iterations Yes 46 43 41 40 41 37 51 45
Trembling aspen
Regression R2 No 0.66 0.86 0.48 0.47 0.67 0.87 0.49 0.43
  Yes 0.91 0.90 0.92 0.79 0.95 0.94 0.95 0.84
Residual S.E. No 5.4 1.5 4.6 2.7 4.0 0.7 3.5 1.8
  Yes 2.8 1.2 1.6 1.3 1.7 0.5 1.0 0.7
Clark-Evans index No 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8
  Yes 1.3 0.8 1.4 1.1 1.3 0.8 1.4 1.0
Assimilation / m 2 No 0.66 0.68 0.65 0.65 0.53 0.33 0.54 0.42
  Yes 0.71 0.71 0.70 0.69 0.59 0.36 0.62 0.46
Assimilation / tree No 9.8 10.0 9.7 9.7 7.8 4.9 8.0 6.2
  Yes 10.5 10.6 10.5 10.3 8.7 5.3 9.2 6.9
% with assim. 0 No 11.9 0.0 3.5 0.0 11.9 0.0 3.5 0.0
  Yes 3.5 0.0 1.0 0.0 4.0 0.0 1.0 0.0
Mean displacement (m) Yes 1.9 1.7 1.8 1.7 1.9 1.8 1.8 1.7
% at disp. bound Yes 19 24 19 15 20 24 21 13
Iterations Yes 35 49 45 38 53 62 60 42
Black spruce
Regression R2 No 0.61 0.63 0.57 0.46 0.70 0.64 0.63 0.48
  Yes 0.94 0.92 0.92 0.85 0.96 0.93 0.93 0.89
Residual S.E. No 1.50 1.05 1.19 0.98 0.74 0.46 0.74 0.57
  Yes 0.55 0.43 0.47 0.44 0.26 0.20 0.34 0.26
Clark-Evans index No 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7
  Yes 1.1 1.1 1.2 1.2 1.1 1.1 1.2 1.1
Assimilation / m 2 No 0.65 0.65 0.60 0.60 0.40 0.29 0.43 0.36
  Yes 0.73 0.71 0.73 0.72 0.50 0.36 0.58 0.48
Assimilation / tree No 1.9 1.9 1.7 1.7 1.2 0.9 1.2 1.0
  Yes 2.1 2.1 2.1 2.1 1.5 1.0 1.7 1.4
% with assim. 0 No 34 0 24 0 34 0 24 0
  Yes 20 0 17 0 21 0 18 0
Mean displacement (m) Yes 1.0 1.2 1.1 1.2 1.0 1.1 1.1 1.3
% at disp. bound Yes 44 49 52 55 45 45 48 59
Iterations Yes 55 42 57 36 56 41 50 61