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
Estimate | Standard error | Observed subplot biomass (g·m−2) | Predicted subplot biomass (g·m− 2) | ||
|---|---|---|---|---|---|
β0 | Intercept | 0.7716507 *** | 0.1232084 | na | na |
β1 | Cover class 2 | na | na | 4.1 ± 3.2 | 3.0 ± 0.4 |
Cover class 3 | 1.3341515 *** | 0.1155178 | 13.5 ± 9.3 | 11.4 ± 1.5 | |
Cover class 4 | 2.0968932 *** | 0.1199388 | 28.3 ± 16.6 | 24.6 ± 3.5 | |
Cover class 5 | 2.9866689 *** | 0.1294084 | 66.3 ± 33.7 | 60.9 ± 9.8 | |
Cover class 6 | 3.7241023 *** | 0.1409310 | 145.1 ± 86.3 | 126.5 ± 20.8 | |
β2 | Elevation | 0.0003537 *** | 0.0001020 | na | na |