Table 1.
(a) Results of the model testing, comparing the power of two models—one with only the plant removal treatments, one with both the removal treatment and the amount of biomass removed as factors—in explaining the change in ecosystem CO2 net exchange (NEE), gross ecosystem production (GEP), net methane (CH4) flux, and the content of dissolved organic carbon, before and after plant removal. LLmax = maximized log-likelihood of the model, AIC = Akaike Information criterion, AICc = corrected AIC. (b) Results of analysis on variance (ANOVA) on the most significant model, i.e. the model with the lowest AICc.
| (a) | ||||
|---|---|---|---|---|
| ecosystem process | model | LLmax | AIC | AICc |
| NEE | ∼treatment | 2.5 | 9.1 | 16.06 |
| ∼treatment + biomass removed | 3.3 | 9.4 | 18.95 | |
| GEP | ∼treatment + biomass removed | –5.3 | 26.6 | 36.21 |
| ∼treatment | –9.0 | 32.0 | 39.00 | |
| CH4-flux | ∼treatment | 80.3 | –146.7 | –139.69 |
| ∼treatment + biomass removed | 80.3 | –144.7 | –135.10 | |
| DOC | ∼treatment | –84.2 | 182.4 | 189.44 |
| ∼treatment + biomass removed | –83.9 | 183.8 | 193.36 | |
| (b) | ||||
| factor | F-value | p-value | ||
| NEE | treatment | 7.9 | ≤0.001 | |
| GEP | treatment | 10.5 | ≤0.001 | |
| biomass removed | 6.1 | 0.024 | ||
| CH4-flux | treatment | 0.6 | 0.686 | |
| DOC | treatment | 0.8 | 0.547 | |