Ecological Archives M082-007-A13
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 M (Table M1). Regression parameters for significant site-level models of growth for wood density classes and for functional groups as a function of single soil resources.
Table M1. Parameter estimates and R2 values for linear regressions of stand-level mean growth (basal area increment (cm2 year-1)) as a function of soil resources for wood density categories, excluding the Fabaceae. Per-site sample sizes presented in Appendix H.
| Resource | R2 | Slope | Intercept |
| 0.2–0.4 g cm-3 | |||
| P | 0.898 | 2.375 (0.900, 3.850) | 1.948 (-2.56, 6.453) |
| K | 0.792 | 0.130 (0.008, 0.253) | -3.64 (-15.4, 8.131) |
| 0.4–0.55 g cm-3 | |||
| Mg | 0.806 | 0.155 (0.015, 0.294) | -1.21 (-8.12, 5.695) |
| 0.55–0.7 g cm-3—no significant parameter estimates | |||
| 0.7–1.2 g cm-3 | |||
| Ca | 0.778 | 0.247 (0.004, 0.489) | -8.111 (-34.24, 18.0) |
| Unknown density | |||
| P | 0.790 | 0.907 (0.048, 1.767) | 4.243 (1.611, 6.874) |
Table M2. Parameter estimates and R2 values for linear regressions of stand-level mean growth (basal area increment (cm2 year-1)) as a function of soil resources for wood density categories, including the Fabaceae. Per-site sample sizes presented in Appendix J.
| Resource | R2 | Slope | Intercept |
| 0.2–0.4 g cm-3 | |||
| P | 0.898 | 2.375 (0.900, 3.850) | 1.948 (-2.56, 6.453) |
| K | 0.792 | 0.130 (0.008, 0.253) | -3.64 (-15.4, 8.131) |
| 0.4–0.55 g cm-3 | |||
| Mg | 0.806 | 0.155 (0.015, 0.294) | -1.21 (-8.12, 5.695) |
| 0.55–0.7 g cm-3—no significant parameter estimates | |||
| 0.7–1.2 g cm-3 | |||
| K | 0.779 | 0.371 (0.009, 0.734) | -18.16 (-53.56, 17.2) |
| Ca | 0.778 | 0.247 (0.004, 0.489) | -8.111 (-34.24, 18.0) |
| Unknown density | |||
| P | 0.790 | 0.907 (0.048, 1.767) | 4.243 (1.611, 6.874) |
| Ca | 0.783 | 0.038 (0.001, 0.074) | 2.929 (-0.952, 6.81) |
Table M3. Parameter estimates and R2 values for linear regressions of stand mean growth (basal area increment (cm2 year-1) as a function of soil resources for wood density classes within functional groups. Growth was not related to soil resources for any density classes in the Fabaceae.
|
Functional Group |
Wood Density (g cm-3) |
Resource | R2 | Slope | Intercept |
| FC | no significant parameter estimates | ||||
| F<C | no significant parameter estimates | ||||
| AS | 0.2–0.4 | P | 0.899 | 2.615 (1.003, 4.228) | -1.679 (-6.512, 3.153) |
| Unknown | Mg | 0.915 | 0.048 (0.004, 0.093) | -1.958 (-4.371, 0.454) | |
| A<S | 0.4–0.55 | P | 0.954 | 0.331 (0.197, 0.464) | -0.257 (-0.684, 0.169) |
| 0.4–0.55 | Ca | 0.826 | 0.012 (0.002, 0.023) | -0.65 (-1.834, 0.534) | |
| NLDC | 0.2–0.4 | NO3 | 0.793 | -0.646 (-1.252, -0.04) | 81.43 (26.6, 136.305) |
| Unknown | NH4 | 0.803 | 0.166 (0.015, 0.317) | -0.471 (-21.047, 20.11) | |
| NLD<C | 0.4–0.55 | P | 0.962 | 1.226 (0.778, 1.673) | 3.03 (1.652, 4.408) |
| 0.55–0.7 | P | 0.927 | 1.135 (0.552, 1.718) | 1.965 (0.159, 3.771) | |
| 0.55–0.7 | Ca | 0.906 | 0.049 (0.02, 0.078) | 0.049 (-3.077, 3.176) | |
| Unknown | P | 0.920 | 0.958 (0.438, 1.478) | 1.251 (-0.337, 2.84) | |