Table 4 Coefficients with standard error of bivariate linear regression model (Eq. 1a for plant groups and Eq. 1b for total herb layer) between total above-ground biomass and percentage cover and elevation for plant groups and herb layer total on subplots, and explained variation (R2), Pearson product-moment correlation coefficient (Cor.coeff) and root mean squared error (RMSE). See Table 2 for sample size. Note that for modeling, percent cover of plant group is transformed using the natural logarithm, total herb layer cover is not transformed
Plant group | β0 (Intercept) | β1 (Percent Cover) | β2 (Elevation) | Adj. R2 | Cor.coeff | RMSE (g·m−2) |
|---|---|---|---|---|---|---|
Small herbs | −0.5935310 *** (0.1274447) | 0.9039098 *** (0.0387518) | 0.0003887 *** (0.0001068) | 0.63 *** | 0.63 *** | 10.1 |
Tall herbs | −0.3404689 (0.2858600) | 1.0773257 *** (0.0624539) | 0.0002557 (0.0002246) | 0.75 *** | 0.81 *** | 25.1 |
Grasses | −0.1751947 (0.1818310) | 1.1453724 *** (0.0481618) | 0.00006194 ° (0.0001502) | 0.79 *** | 0.91 *** | 28.5 |
Sedges | −0.1314442 (0.1536686) | 1.1004399 *** (0.0432052) | 0.0003158 * (0.0001321) | 0.77 *** | 0.68 *** | 24.2 |
Ferns | −0.6882659 *** (0.1569825) | 1.1599828 *** (0.0390035) | 0.0001060 (0.0001206) | 0.84 *** | 0.83 *** | 23.8 |
Shrubs | −0.8868706 *** (0.1464385) | 1.1755751 *** (0.0321635) | 0.0009174 *** (0.0001047) | 0.86 *** | 0.77 *** | 88.9 |
Shrubs leaves1 | − 0.54936569 * (0.27448296) | 0.94944646 *** (0.06683793) | 0.00004201 (0.00019741) | 0.75 *** | 0.83 *** | 10.1 |
Total, incl. Woody parts of shrubs | 0.98555045 *** (0.09465661) | 0.04150483 *** (0.00106115) | 0.00061034 *** (0.00008286) | 0.80 *** | 0.72 *** | 84.4 |
Total, excl. Woody parts of shrubs2 | 1.0841536 *** (0.1165718) | 0.0414646 *** (0.0014661) | 0.0002700 * (0.0001085) | 0.76 *** | 0.88 *** | 29.3 |