Table 4 Relative model errors (%) in estimates of the mean per tree above-ground tree biomass with actual (ACT), refitted (REFIT), recovered (RECOV), and robustly recovered (RREC) covariance matrices for the parameters in the biomass equations in Table 1
From: Model errors in tree biomass estimates computed with an approximation to a missing covariance matrix
Species | Model | Weights? | ACT | REFIT | RECOV | RREC |
|---|---|---|---|---|---|---|
BEECH | LIN | No | 11.5 | 14.0 | 12.3 | 12.8 |
NLIN | No | 8.7 | 9.1 | 8.0 | 8.4 | |
LIN | Yes | 4.7 | 8.8 | 7.8 | 11.6 | |
NLIN | Yes | 4.4 | 6.6 | 6.9 | 9.4 | |
SPRUCE | LIN | No | 9.8 | 8.4 | 7.2 | 7.4 |
NLIN | No | 7.0 | 6.6 | 5.4 | 5.6 | |
LIN | Yes | 6.2 | 10.0 | 5.4 | 7.4 | |
NLIN | Yes | 5.6 | 8.5 | 4.8 | 6.6 | |
PINE | LIN | No | 6.9 | 5.9 | 4.9 | 5.1 |
NLIN | No | 5.3 | 4.7 | 3.8 | 4.0 | |
LIN | Yes | 4.8 | 22.3 | 3.5 | 4.3 | |
NLIN | Yes | 4.2 | 19.0 | 3.0 | 3.8 |