Ecological Archives M082-007-A8
Thomas W. Baribault, Richard K. Kobe, and Andrew O. Finley. 2012. Tropical tree growth is correlated with soil phosphorus, potassium, and calcium, though not for legumes. Ecological Monographs 82:189–203. http://dx.doi.org/10.1890/11-1013.1
Appendix H. Regression parameters for significant site-level models of growth for functional groups as a function of single soil resources.
Table H1. Parameter estimates and R2 values for linear regressions of stand-level mean growth (basal area increment (cm2 yr-1)) as a function of soil resources for functional groups. Compared to other functional groups, the Fabaceae show the weakest relationships of growth to soil resources—no model had significant parameters.
|
Functional group |
Resource | R2 | Slope | Intercept |
| FC | No significant parameter estimates | |||
| F<C | No significant parameter estimates | |||
| AS | P | 0.868 | 2.699 (0.764, 4.634) | -2.455 (-8.261, 3.352) |
| A<S | P | 0.961 | 0.337 (0.212, 0.462) | -0.284 (-0.683, 0.115) |
| A<S | Ca | 0.843 | 0.013 (0.003, 0.023) | -0.687 (-1.824, 0.451) |
| NLDC | K | 0.864 | 0.121 (0.033, 0.210) | 4.957 (-3.580, 13.50) |
| NLD<C | P | 0.958 | 1.046 (0.644, 1.448) | 2.150 (0.898, 3.402) |
| NLD<C | K | 0.822 | 0.057 (0.008, 0.107) | -0.317 (-5.073, 4.44) |
| NLD<C | Ca | 0.816 | 0.041 (0.005, 0.077) | 0.797 (-3.118, 4.713) |
Table H2. Sample sizes by site for each wood density group.
| Site | Density (g/cm-3) | ||||
| 0.2–0.4 | 0.4–0.55 | 0.55–0.7 | 0.7–0.85 | Unknown | |
| 1 | 187 | 233 | 174 | 26 | 247 |
| 2 | 169 | 224 | 202 | 23 | 235 |
| 3 | 212 | 206 | 228 | 44 | 315 |
| 4 | 232 | 110 | 342 | 5 | 122 |
| 5 | 158 | 191 | 165 | 12 | 126 |