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Table 6 Coefficients and standard error of standard linear regression model (Eq. 2) between total non-woody above-ground biomass from subplots without shrub occurrence (N = 187) as well as subplots with measured woody and non-woody shrub biomass (n = 68) but excluding the woody parts (i.e. total N = 255) and cover class and elevation on subplots. For each cover class mean (±SD) observed and predicted biomass is presented; see Table 1 for sample size

From: Extending harmonized national forest inventory herb layer vegetation cover observations to derive comprehensive biomass estimates

 EstimateStandard errorObserved subplot biomass (g·m−2)Predicted subplot biomass (g·m− 2)
β0Intercept0.7716507 ***0.1232084nana
β1Cover class 2nana4.1 ± 3.23.0 ± 0.4
Cover class 31.3341515 ***0.115517813.5 ± 9.311.4 ± 1.5
Cover class 42.0968932 ***0.119938828.3 ± 16.624.6 ± 3.5
Cover class 52.9866689 ***0.129408466.3 ± 33.760.9 ± 9.8
Cover class 63.7241023 ***0.1409310145.1 ± 86.3126.5 ± 20.8
β2Elevation0.0003537 ***0.0001020nana
  1. Significance codes: 0 ‘***’, 0.001 ‘**’, 0.01 ‘*’, 0.05 °