Table 2. Mean (SE) abiotic parameters (n = 4) at the different sites during BVOC sampling.
| Site | Treatment | Chamber Temp (°C) | Air Temp (°C) a | Soil moisture % | Soil Temp (°C) 2 cm | Soil Temp (°C) 5 cm | PAR b (μmol m-2 s-1) |
|---|---|---|---|---|---|---|---|
| High Arctic | |||||||
| Cassiope-heath | Control | 16.3 (1.5) | 10.7 (0.6) | 27.4 (1.7) | 8.5 (0.3) | 8.3 (0.2) | 731 (79) |
| Warming | 16.7 (1.5) | 10.7 (0.6) | 25.6 (4.0) | 9.6 (0.4) | 9.2 (0.2) | 597 (73) | |
| Salix-heath | Control | 17.8 (1.4) | 14 (0.9) | 22.5 (1.7) | 9.1 (0.2) | 8.6 (0.2) | 618 (75) |
| Warming | 18.9 (1.5) | 14 (0.9) | 14.1 (1.7) | 10.3 (0.3) | 9.4 (0.2) | 547 (68) | |
| Low Arctic | |||||||
| Betula-heath | 12.3 (1.6) | 7.0 (0.6) | 66.1 (8.3) | 7.8 (0.7) | 6.7 (0.4) | 809 (139) | |
| Salix-heath | 12.7 (1.5) | 7.1 (0.7) | 66.1 (8.3) | 7.6 (0.6) | 7.7 (1.1) | 836 (141) | |
| Light/Dark c | Control | 21.9 (1.5) | 14.9 (0.7) | 43.0 (10.6) | 8.6 (0.7) | 6.1 (0.4) | 1118 (170) |
| Warming | 28.6 (1.7) | 14.5 (0.8) | 26.8 (8.1) | 9.4 (0.8) | 5.4 (0.7) | 1068 (212) | |
| Subarctic | |||||||
| July | 14.4 (0.3) | n.a d | 100 | n.a d | n.a d | 165 (22) | |
| August | 14.3 (0.6) | n.a d | 100 | n.a d | n.a d | 245 (39) |
a The Air temperature was measured at 1.5 meters above the ground. There are no treatments included in the air temperature measurements.
b PAR is the average measured PAR per campaign and 24-hour
c Note that the values presented from the light/dark experiment (except PAR) are from measurements in both light and darkness.
dData is not available (n.a)