Table 1 Regression results for mineral soil δ15N vs. climate. Inflection point for MAT in the breakpoint model was 9.83 ± 1.83 °C. r2 = 0.26 for the breakpoint model and 0.24 for the linear model. Units for MAP were mm before log-transformation
From: Convergence of soil nitrogen isotopes across global climate gradients
Estimate | P | |
|---|---|---|
Breakpoint | ||
Intercept (‰) | 7.71 ± 0.65 | <0.001 |
MATCold (‰ °C−1) | 0.03 ± 0.02 | >0.1 |
MATHot (‰ °C−1) | 0.18 ± 0.02 | <0.001 |
log10 MAP (‰) | −1.78 ± 0.24 | <0.001 |
Average Depth (‰ cm−1) | 0.08 ± 0.02 | <0.001 |
Linear | ||
Intercept (‰) | 8.31 ± 0.64 | <0.001 |
MAT (‰ °C−1) | 0.12 ± 0.01 | <0.001 |
log10 MAP (‰) | −2.10 ± 0.23 | <0.001 |
Average Depth (‰ cm−1) | 0.09 ± 0.02 | <0.001 |
