Resources Science ›› 2019, Vol. 41 ›› Issue (6): 1070-1081.doi: 10.18402/resci.2019.06.06
• Orginal Article • Previous Articles Next Articles
Received:
2018-08-25
Revised:
2019-01-04
Online:
2019-06-25
Published:
2019-06-25
Zhenmin DING, Shunbo YAO. Effects of cultivated land transition on ecosystem service value in Shaanxi Province of China[J].Resources Science, 2019, 41(6): 1070-1081.
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Table 2
Variables and descriptive statistics"
变量代码 | 变量名称 | 计算方式 | 单位 | 均值 | 标准差 | 最小值 | 最大值 |
---|---|---|---|---|---|---|---|
mesv | 单位面积生态系统服务价值 | 县域生态系统服务价值/县域总面积 | 元/hm2 | 9840.700 | 3124.693 | 0.000 | 15273.050 |
urban | 城镇扩张水平 | 县域城镇用地面积/(县域城乡建设用地面积+县域耕地面积) | — | 0.046 | 0.172 | 0.000 | 1.000 |
pfgc | 林草覆盖率 | (县域林地面积+县域草地面积)/县域总面积 | — | 0.500 | 0.266 | 0.000 | 0.952 |
slope | 坡度 | 均值提取于DEM(90 m)栅格数据 | ° | 3.513 | 2.481 | 0.174 | 10.165 |
aspect | 坡向 | 均值提取于DEM(90 m)栅格数据,并经过计算得到 | ° | -7.518 | 6.069 | -23.155 | -0.068 |
temp | 气温 | 均值提取于气温(1 km)格数据 | ℃ | 11.944 | 1.938 | 7.240 | 15.490 |
rain | 降水量 | 均值提取于降水(1 km)格数据 | mm | 683.159 | 213.128 | 287.124 | 1401.146 |
water | 水域比例 | 县域水域面积/县域面积 | — | 0.011 | 0.013 | 0.000 | 0.076 |
Table 3
Gains and losses of ecosystem service value in Shaanxi Province, 1990-2000 (亿元)"
1990 | 2000 | ||||||
---|---|---|---|---|---|---|---|
耕地 | 森林 | 草地 | 水域 | 城乡建设用地 | 未利用地 | 转出总计 | |
耕地 | 0.000 | 2.442 | 4.798 | 3.964 | -1.306 | -0.111 | 9.788 |
森林 | -1.767 | 0.000 | -0.734 | 0.215 | -0.313 | -0.053 | -2.653 |
草地 | -9.706 | 0.999 | 0.000 | 2.304 | -0.152 | -1.160 | -7.715 |
水域 | -6.830 | -0.187 | -3.375 | 0.000 | -0.058 | -0.351 | -10.802 |
城乡建设用地 | 0.084 | 0.015 | 0.036 | 0.029 | 0.000 | 0.000 | 0.164 |
未利用地 | 0.108 | 1.079 | 16.892 | 0.883 | -0.002 | 0.000 | 18.960 |
转入总计 | -18.111 | 4.349 | 17.617(0.725) | 7.394 | -1.831 | -1.676 | 7.742*(-9. 15) |
Table 4
Gains and losses of ecosystem service value in Shaanxi Province, 2000-2015 (亿元)"
2000 | 2015 | ||||||
---|---|---|---|---|---|---|---|
耕地 | 森林 | 草地 | 水域 | 城乡建设用地 | 未利用地 | 转出总计 | |
耕地 | 0.000 | 16.906 | 38.546 | 18.125 | -5.348 | -0.132 | 68.097 |
森林 | -4.393 | 0.000 | -0.718 | 1.300 | -1.430 | -0.799 | -6.040 |
草地 | -21.049 | 2.598 | 0.000 | 7.732 | -5.502 | -2.041 | -18.263 |
水域 | -13.632 | -0.777 | -6.927 | 0.000 | -2.193 | -0.324 | -23.852 |
城乡建设用地 | 0.397 | 0.369 | 0.212 | 0.895 | 0.000 | 0.000 | 1.873 |
未利用地 | 0.452 | 0.199 | 2.606 | 2.106 | -0.083 | 0.000 | 5.281 |
转入总计 | -38.224 | 19.296 | 33.719(31.113) | 30.158 | -14.556 | -3.297 | 27.096*(24.490) |
Table 6
Results of the models"
lnmesv | 模型(1)直接效应 | 模型(2)调节效应 | 模型(3)门槛效应 | |||||
---|---|---|---|---|---|---|---|---|
系数 | 标准误差 | 系数 | 标准误差 | 系数 | 标准误差 | |||
urban | -0.976*** | 0.197 | -1.588*** | 0.312 | ||||
urban_1 (pfgc<0.013) | -2.782*** | 0.166 | ||||||
urban_2 (0.013<=pfgc<0.837) | -0.617*** | 0.142 | ||||||
urban_3 (pfgc>=0.837) | 2.504 | 2.866 | ||||||
pfgc | 1.472*** | 0.211 | 1.479*** | 0.428 | ||||
pu | 11.600*** | 2.502 | ||||||
lntemp | -0.127 | 0.085 | -0.459* | 0.272 | -0.679*** | 0.095 | ||
lnrain | 0.063 | 0.054 | 0.069 | 0.070 | -0.078 | 0.049 | ||
slop | 0.223*** | 0.031 | 0.180*** | 0.058 | 0.089*** | 0.009 | ||
aspect | 0.124*** | 0.036 | 0.067 | 0.077 | 0.011*** | 0.003 | ||
water | 15.804*** | 1.561 | 15.478*** | 4.717 | 12.664*** | 1.244 | ||
控制个体 | YES | YES | — | |||||
_cons | 6.812*** | 0.519 | 8.560*** | 1.486 | 12.696*** | 0.513 | ||
R2 | 0.9616 | 0.9641 | — |
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