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3 平地和坡地系统中不同载畜率下稀有种多度分布的模型拟合结果
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Table 3 Test of model ?tting for abundance distribution of rare 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 | 23.13 | | 56.11 | | 18.58 | | 1.5 | 80.15 | | 56.24 | | 74.73 | | 3.0 | 113.70 | | 9 781.84 | | 154.24 | | 4.5 | 44.96 | | 784.52 | | 34.67 | | 6.0 | 336.39 | | 314.85 | | 83.12 | | 7.5 | 34.10 | | 172 703.88 | | 18.34 | | 9.0 | 27.33 | | 71.58 | | 27.74 | | 坡地 Slope | 0 | 40.46 | | 25 043.12 | | 54.60 | | 1.5 | 3.00 | | 147.06 | | 2.49 | | 3.0 | 9.06 | | 429 739.72 | | 6.87 | | 4.5 | 5.24 | | 559.83 | | 5.56 | | 6.0 | 49.32 | | 390.53 | | 18.02 | | 7.5 | - | | - | | - | | 9.0 | - | | - | | - |
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