| 高寒草地不同坡向金露梅种群空间分布格局研究 |
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| 引用本文： | 高寒草地不同坡向金露梅种群空间分布格局研究.高寒草地不同坡向金露梅种群空间分布格局研究[J].畜牧与饲料科学,2016,37(6):49-49. |
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| 作者姓名： | 高寒草地不同坡向金露梅种群空间分布格局研究 |
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| 作者单位： | [1]甘肃省经纬环境工程技术有限公司,甘肃兰州730000 [2]西北师范大学地理与环境科学学院,甘肃兰州730070 |
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| 摘 要： | 采用Ripley的k（d）函数分析方法及群落学调查法,对祁连山高寒草地不同坡向金露梅（Potentilla fruticosa）种群的空间格局分布特征进行了研究。结果表明,金露梅种群高度、密度和盖度阴坡〉平地〉阳坡,金露梅种群分枝数阳坡〉平地〉阴坡。金露梅种群的空间分布格局表现出与尺度密切相关的变化趋势,在阳坡,金露梅种群在较小尺度上表现为聚集分布,较大尺度上表现为随机分布;在阴坡,种群在所有尺度上表现为聚集分布,且聚集强度在降低;在平地,种群空间分布格局表现为均匀—随机的分布模式。坡向因素影响下的金露梅种群空间分布格局发生了较大转变,体现了植物种群的环境响应机制。
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Spatial Distribution Patterns of Potentilla fruticosa Population on Different Aspects of Slope in Alpine Grassland |
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| Abstract: | The spatial pattern distribution characteristics of Potentilla fruticosa population in alpine grassland of Qilian Mountain was studied by using Ripley′s k（d） function and community survey method. The results showed that for the height, density and coverage of the Potentilla fruticosa population, the shady slope is at the maximum level,sunny slope is at the minimum level,and the level of the flat land is between them; For the branch number of the population, the sunny slope is at the maximum level, shady slope is at the minimum level,and the level of the flat land is between them. The spatial distribution pattern of Potentilla fruticosa population exhibited a scale-associated changing trend： in the sunny slope, Potentilla fruticosa population showed an aggregated distribution pattern on a smaller scale, while on a larger scale, it showed a random distribution pattern; in the shady slope, the population in all scale showed an aggregated distribution, and the aggregation intensity exhibited a decreasing trend; in the flat land, the population showed an uniform-random distribution pattern. Due to the influence of slope aspect, the spatial distribution pattern of Potentilla fruticosa population was greatly changed, indicating the response mechanism of plant population to environment. |
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