Table 1.
Statistics on relationships between plant and soil biota responses to GCFs across forests, grasslands, and croplands in mixed-effects meta-regression models
| GCFs | Forest | Grassland | Cropland | |
|---|---|---|---|---|
| CO2 | Slope | 0.32 (0.12 ~ 0.53) | − 0.06 (− 0.18 ~ 0.06) | 0.02 (− 0.09 ~ 0.14) |
| P | 0.002 | 0.31 | 0.66 | |
| n | 95 (15) | 72 (19) | 81 (8) | |
| W | Slope | 0.02 (− 0.19 ~ 0.22) | −0.006 (− 0.10 ~ 0.08) | − 0.004 (− 0.11 ~ 0.10) |
| P | 0.89 | 0.90 | 0.94 | |
| n | 57 (12) | 251 (32) | 17 (3) | |
| PRE- | Slope | 0.06 (− 0.15 ~ 0.27) | − 0.006 (− 0.07 ~ 0.06) | – |
| P | 0.58 | 0.85 | – | |
| n | 37 (7) | 260 (31) | – | |
| PRE+ | Slope | 0.005 (− 0.16 ~ 0.17) | 0.10 (0.02 ~ 0.18) | 1.25 (0.80 ~ 1.70) |
| P | 0.95 | 0.01 | 0.00 | |
| n | 31 (2) | 459 (35) | 28 (2) | |
| N | Slope | 0.27 (0.10 ~ 0.44) | 0.02 (− 0.05 ~ 0.09) | 0.09 (− 0.30 ~ 0.48) |
| P | 0.002 | 0.61 | 0.64 | |
| n | 124 (27) | 726 (78) | 43 (8) | |
| P | Slope | 0.27 (0.14 ~ 0.39) | 0.005(− 0.06 ~ 0.07) | 0.01 (− 0.04 ~ 0.06) |
| P | 0.00 | 0.88 | 0.70 | |
| n | 39 (10) | 124 (20) | 135 (9) | |
| N + P | Slope | 0.01 (− 0.26 ~ 0.27) | − 0.007 (− 0.05 ~ 0.04) | − 0.03 (− 0.22 ~ 0.16) |
| P | 0.96 | 0.77 | 0.78 | |
| n | 22 (7) | 150 (22) | 11 (6) |
The slope indicates the coupling coefficient, and the numbers in parentheses are the variation intervals of the slope. P values indicate the statistical significance of coefficients by the two-sided z-test (). The letter n represents the sample size of paired data of plants and soil biota under GCFs, and the numbers in parentheses are the number of publications.