放牧强度和地形对内蒙古典型草原物种多度分布的影响
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李文怀, 郑淑霞, 白永飞
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Effects of grazing intensity and topography on species abundance distribution in a typical steppe of Inner Mongolia
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LI Wen-Huai, ZHENG Shu-Xia, BAI Yong-Fei
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表1 平地和坡地系统中不同载畜率下全部物种多度分布的模型拟合结果
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Table 1 Test of model fitting for abundance distribution of entire species at different stocking rates on flat and slopes
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| 地形Topography | 载畜率
Stocking rate
(sheep·hm-2) | 对数正态模型
Log-normal model | | 对数级数模型
Log-series model | | 幂分割模型
Power fraction model | | 拟合值 Fitted value r | | 拟合值 Fitted value r | | 拟合值 Fitted value r | | 平地 Flat | 0 | 102.59 | | 139.36 | | 38.83 | | 1.5 | 258.62 | | 189.75 | | 129.53 | | 3.0 | 257.22 | | 355.39 | | 196.32 | | 4.5 | 124.60 | | 10 728.30 | | 70.35 | | 6.0 | 121.09 | | 4 138.05 | | 113.39 | | 7.5 | 20.74 | | 309.06 | | 51.78 | | 9.0 | 86.56 | | 251.41 | | 97.29 | | 坡地 Slope | 0 | 61.93 | | 2 273.79 | | 69.84 | | 1.5 | 113.16 | | 12 875.49 | | 61.00 | | 3.0 | 10.11 | | 158.85 | | 28.38 | | 4.5 | 17.19 | | 209.91 | | 50.66 | | 6.0 | 85.96 | | 11 951.14 | | 64.37 | | 7.5 | 21.11 | | 911.77 | | 26.30 | | 9.0 | 18.60 | | 593.32 | | 30.48 |
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