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Table 2 Relative 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 (% year −1 )
D 1.30 2, 1226.5 4.03 0.018
f(A) 27.54 1, 1404.2 170.78 <0.001
Y 4.16 1, 4200.9 25.78 <0.001
D × f(A) 3.57 2, 1558 11.07 <0.001
D × Y 9.45 2, 4183.5 29.31 <0.001
f(A) × Y 24.79 1, 3871.3 153.68 <0.001
Biomass loss from mortality (% year −1 )
D 3.69 2, 1717.4 3.35 0.035
f(A) 7.48 1, 1658.6 13.57 <0.001
Y 7.21 1, 3898.4 13.08 <0.001
D × f(A) 5.61 2, 1814.4 5.09 0.006
D × Y 0.61 2, 3899.3 0.55 0.578
f(A) × Y 2.65 1, 3729.5 4.80 0.029
Net biomass change (% year −1 )
D 17.35 2, 1393.2 11.02 <0.001
f(A) 136.93 1, 1341.1 173.96 <0.001
Y 27.00 1, 3794 34.30 <0.001
D × f(A) 16.51 2, 1484.8 10.49 <0.001
D × Y 17.84 2, 3794.3 11.33 <0.001
f(A) × Y 7.00 1, 3571.9 8.89 0.003
  1. Forest age is the inverse of logarithmically transformed age (lnFA −1) and calendar year is represented by Year. Linear mixed-effects model fit tests used Satterthwaite approximations of degrees of freedom