Table 3.
Concentrations of NH+4, NO−3, dissolved organic carbon (DOC), dissolved organic nitrogen (DON), microbial biomass carbon (CMIC), and microbial biomass nitrogen (NMIC) in soil from the mixed heath and Deschampsia mesocosms.
| Mixed heath mesocosms | Deschampsia mesocosms | |||||
|---|---|---|---|---|---|---|
| Control | Root | Soil | Control | Root | Soil | |
| NH+4-N (μg g−1 SOM) | 3.6 ± 0.6 | 3.2 ± 0.3 | 1.8 ± 0.1 | 31 ± 16 | 137 ± 41 | 103 ± 54 |
| NO−3-N (μg g−1 SOM) | 0.81 ± 0.16a | 0.61 ± 0.10a, b | 0.27 ± 0.06b | 80 ± 23 | 260 ± 67 | 159 ± 134 |
| DOC (mg g−1 SOM) | 1.6 ± 0.3a | 1.4 ± 0.1a, b | 0.9 ± 0.1b | 2.6 ± 0.3a | 2.5 ± 0.1a | 4.1 ± 0.4b |
| DON (μg g−1 SOM) | 125 ± 23a | 110 ± 9a, b | 65 ± 4b | 565 ± 62a | 843 ± 92b | 1255 ± 58c |
| CMIC (mg g−1 SOM) | 5.8 ± 0.7 | 5.1 ± 0.3 | 5.3 ± 0.2 | 6.4 ± 1.1 | 5.8 ± 0.7 | 5.9 ± 0.6 |
| NMIC (μg g−1 SOM) | 442 ± 57 | 397 ± 18 | 430 ± 28 | 569 ± 183 | 548 ± 119 | 570 ± 30 |
The mesocosms had intact vegetation (control), had cut aboveground vegetation (root mesocosms) or all vegetation removed (soil mesocosms). Soil was analysed after the last gas exchange measurements.
The values are mean ± SE.
The different letters (a, b, c) indicate statistically significantly differences between the mesocosms types within a location at 95% significance level (Tukey's HSD test).