Table 2 Area percentage of each classification and mean NDVI as well as its slope for different vegetation types under four Elevation Zone during 1987–2006 and 2006–2018 in Qin Mountains.
From: The pattern, change and driven factors of vegetation cover in the Qin Mountains region
Elevation zone | Vegetation type | Area (%) | Period 1 | Period 2 | Increased rate of mean NDVI (%) | ||
|---|---|---|---|---|---|---|---|
1987–2006 | 2006–2018 | ||||||
Mean NDVI | Slope | Mean NDVI | Slope | ||||
I < 1300 m | Cropland | 27.07 | 0.55 | 0.11 | 0.66 | 0.32 | 21.31 |
Forest | 62.24 | 0.67 | 0.11 | 0.79 | 0.29 | 17.00 | |
Grassland | 8.23 | 0.56 | 0.13 | 0.67 | 0.36 | 19.46 | |
II 1300–1800 m | Cropland | 17.94 | 0.46 | 0.14 | 0.60 | 0.46 | 28.30 |
Forest | 78.85 | 0.74 | 0.07 | 0.82 | 0.24 | 10.55 | |
Grassland | 2.87 | 0.57 | 0.10 | 0.66 | 0.42 | 16.17 | |
III 1800–3300 m | Cropland | 21.54 | 0.54 | 0.05 | 0.60 | 0.44 | 10.93 |
Forest | 70.17 | 0.71 | 0.04 | 0.82 | 0.27 | 16.09 | |
Grassland | 7.60 | 0.63 | 0.11 | 0.66 | 0.29 | 4.45 | |
IV > 3300 m | Cropland | 1.43 | 0.57 | 0.06 | 0.62 | 0.28 | 7.72 |
Forest | 35.76 | 0.66 | 0.05 | 0.73 | 0.26 | 10.59 | |
Grassland | 62.68 | 0.61 | 0.11 | 0.69 | 0.26 | 11.80 | |
