Table 3. Comparison of observed and simulated vegetation patterns and its evaluation.
| Plot | Pattern | Species | Observed | Simulated | MAPE | Regression slope (R2) | nrmse (%) |
|---|---|---|---|---|---|---|---|
| Mono-cultures | AGB | F. pratensis | 219.6 (111.8–327.5) | 158.7 (139.8–177.5) | 0.38 | 0.31 (0.44) | 80.3% |
| P. pratensis | 88.8 (44.3–133.4) | 70.2 (55.9–84.4) | 0.48 | ||||
| P. lanceolata | 67.4 (49.3–85.5) | 55.4 (40.0–70.7) | 0.32 | ||||
| LAI | F. pratensis | 2.0 (1.6–2.4) | 1.9 (1.6–2.1) | 0.16 | 0.70 (0.64) | 63.5% | |
| P. pratensis | 1.0 (0.8–1.2) | 0.8 (0.6–1.0) | 0.16 | ||||
| P. lanceolata | 1.2 (0.9–1.6) | 1.1 (0.8–1.4) | 033 | ||||
| Height | F. pratensis | 36.1 (27.1–45.2) | 32.2 (27.0–37.4) | 0.15 | 0.61 (0.67) | 63.2% | |
| P. pratensis | 20.2 (18.8–21.5) | 17.8 (14.2–21.5) | 0.12 | ||||
| P. lanceolata | 18.7 (16.8–20.6) | 15.0 (11.0–19.0) | 0.22 | ||||
| Cover | F. pratensis | 61.8 (56.1–67.5) | 74.1 (70.7–77.6) | 0.53 | -0.01 (0.002) | 106.9% | |
| P. pratensis | 74.5 (72.7–76.3) | 69.7 (61.1–78.4) | 0.28 | ||||
| P. lanceolata | 55.0 (45.1–64.9) | 70.1 (64.2–76.0) | 0.39 | ||||
| Mixture | AGB | P. pratensis + P. lanceolata | 141.7 (86.7–196.8) | 65.7 (50.5–80.9) | 0.91 | 0.15 (0.62) | 105.2% |
| LAI | 1.3 (0.9–1.7) | 1.0 (0.8–1.3) | 0.20 | -0.02 (0.0006) | 134% | ||
| Height | 20.3 (16.8–23.8) | 18.2 (14.6–21.9) | 0.12 | 0.01 (0.003) | 101.9% | ||
| Cover | 77.2 (68.4–86.0) | 69.9 (63.0–76.9) | 0.59 | 0.30 (0.31) | 83.5% |
Average values (years 2003 to 2008) of yearly mean (in brackets the average of yearly minimum and maximum values is given) in terms of aboveground biomass (AGB), leaf area index (LAI), vegetation height and cover are compared for three monocultures and a two-species community.