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Table 1 Growth, mortality, and net biomass change associated with drainage class, forest age, and calendar year

From: Climate change-associated trends in biomass dynamics are consistent across soil drainage classes in western boreal forests of Canada

Fixed effects Sum of squares df F P
Biomass gain from growth (Mg ha −1 year −1 )
D 0.80 2, 1466.1 2.41 0.090
f(A) 12.33 1, 1441.8 73.97 <0.001
Y 0.96 1, 4019.7 5.75 0.017
D × f(A) 0.01 2, 1546.8 0.02 0.976
D × Y 0.86 2, 4029.4 2.58 0.076
f(A) × Y 0.49 1, 3444.6 2.96 0.085
Biomass loss from mortality (Mg ha −1 year −1 )
D 14.77 2, 1713.4 6.39 0.002
f(A) 43.72 1, 1615.1 37.83 <0.001
Y 21.45 1, 3898.2 18.56 <0.001
D × f(A) 20.86 2, 1716.9 9.02 <0.001
D × Y 3.61 2, 3933.1 1.56 0.210
f(A) × Y 0.66 1, 3588.3 0.57 0.450
Net biomass change (Mg ha −1 year −1 )
D 11.56 2, 1804.6 4.06 0.017
f(A) 143.50 1, 1643.9 100.89 <0.001
Y 34.16 1, 3854.9 24.02 <0.001
D × f(A) 30.33 2, 1729.9 10.66 <0.001
D × Y 8.38 2, 3901.1 2.95 0.053
f(A) × Y 0.19 1, 3646 0.13 0.714
  1. Forest age is logarithmically transformed (lnFA) and calendar year is represented by Year. Linear mixed-effects model fit tests used Satterthwaite approximations of degrees of freedom