Table 2.
Comparison of vegetative structure and biodiversity variables between slope aspects using one-way ANOVA for the whole valley scale and each site level (Mean ± standard error) values are shown, differ.n-s, difference value between north- and south-facing slopes).
| Structure | Biomass (kg ha−1) | Cover (%) | Height (cm) | Density | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| North | South | Differn-s | p | North | South | Differn-s | p | North | South | Differn-s | p | North | South | Differn-s | p | |
| Wenchuan | 2322.7 (± 371.41) | 1778.61 (± 554.94) | 544.09 | 0.449 | 71.5 (± 5.67) | 42.14 (± 3.43) | 29.36 | 0.001 | 78.67 (± 7.96) | 22.00 (± 2.35) | 56.67 | < 0.001 | 280.00 (± 38.39) | 80.57 (± 8.98) | 199.43 | < 0.001 |
| Feihong | 7966.39 (± 1227.91) | 4819.81 (± 536.61) | 3146.58 | 0.026 | 82.6 (± 8.62) | 60.14 (± 1.52) | 22.46 | 0.012 | 93.40 (± 10.64) | 34.00 (± 1.90) | 59.40 | < 0.001 | 33.00 (± 6.04) | 833.86 (± 104.35) | − 800.86 | < 0.001 |
| Shidaguan | 9207.72 (± 2105.67) | 1214.30 (± 258.84) | 7993.42 | < 0.001 | 57.14 (± 1.74) | 46.00 (± 4.99) | 11.14 | 0.092 | 142.86 (± 24.64) | 31.80 (± 1.69) | 111.06 | < 0.001 | 118.00 (± 15.26) | 43.10 (± 5.80) | 74.90 | < 0.001 |
| Total | 6567.9 (± 1124.89) | 2430.49 (± 401.05) | 4137.41 | < 0.001 | 69.00 (± 3.85) | 49.00 (± 2.73) | 20.00 | < 0.001 | 107.72 (± 12.05) | 29.58 (± 1.49) | 78.14 | < 0.001 | 148.39 (± 27.52) | 284.67 (± 79.06) | − 136.28 | 0.656 |
| Diversity | Fisher’s α | Shannon | Simpson | Distinct | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| North | South | Differn-s | p | North | South | Differn-s | p | North | South | Differn-s | p | North | South | Differn-s | p | |
| Wenchuan | 3.06 (± 0.25) | 1.80 (± 0.16) | 1.26 | < 0.001 | 8.50 (± 0.84) | 4.42 (± 0.33) | 4.08 | < 0.001 | 6.75 (± 0.86) | 3.54 (± 0.35) | 3.21 | 0.004 | 0.41 (± 0.03) | 0.22 (± 0.02) | 0.19 | < 0.001 |
| Feihong | 4.33 (± 0.38) | 0.77 (± 0.06) | 3.56 | < 0.001 | 6.79 (± 0.62) | 2.99 (± 0.22) | 3.80 | < 0.001 | 5.55 (± 0.72) | 2.36 (± 0.21) | 3.19 | < 0.001 | 0.29 (± 0.02) | 0.27 (± 0.03) | 0.02 | 0.896 |
| Shidaguan | 1.16 (± 0.11) | 2.64 (± 0.24) | − 1.48 | < 0.001 | 3.13 (± 0.25) | 4.90 (± 0.23) | − 1.77 | 0.001 | 2.46 (± 0.21) | 3.92 (± 0.27) | − 1.46 | 0.002 | 0.72 (± 0.03) | 0.32 (± 0.03) | 0.40 | < 0.001 |
| Total | 2.68 (± 0.34) | 1.85 (± 0.19) | 0.83 | < 0.001 | 5.94 (± 0.65) | 4.21 (± 0.22) | 1.73 | 0.006 | 4.75 (± 0.57) | 3.35 (± 0.21) | 1.40 | 0.013 | 0.50 (± 0.05) | 0.28 (± 0.02) | 0.22 | < 0.001 |