Table 1. Model parameters of power function of microbial element concentrations and soil element concentrations for eleven key biomes [values are mean (standard error)] (all regressions are significant at 0.01 level).
| Biome | Model parameter |
||
|---|---|---|---|
| a | b | r2 | |
| Boreal Forest | 0.6630 (0.0316) | −0.3915 (0.1151) | 0.83 |
| Temperate Coniferous Forest | 0.7136 (0.0182) | −0.9651 (0.0556) | 0.82 |
| Temperate Broadleaf Forest | 0.6712 (0.0175) | −0.7493 (0.0552) | 0.80 |
| Tropical/Subtropical Forest | 0.7617 (0.0165) | −0.9536 (0.0454) | 0.85 |
| Grassland | 0.8114 (0.0139) | −1.0344 (0.0392) | 0.85 |
| Cropland | 0.8677 (0.0104) | −1.3846 (0.0290) | 0.78 |
| Natural Wetland | 0.5713 (0.0303) | −0.1127 (0.1005) | 0.85 |
| Pasture | 0.7174 (0.0224) | −0.8233 (0.0701) | 0.80 |
| Shrubland | 0.7565 (0.0465) | −0.9388 (0.1429) | 0.86 |
| Tundra | 0.8353 (0.0372) | −1.0250 (0.1267) | 0.90 |
| Desert/Bare soils | 0.6010 (0.0443) | −0.5680 (0.0974) | 0.48 |
a is the slope, and b is the intercept of the regressed equations for each biome following the equation 1, Log(microbial elements) = a * Log(soil elements) + b; r2 is the coefficient of determination of these regressions.