| 基于Ripley's K函数和Taylor幂法则的江西省豚草种群空间分布的点格局分析 |
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| 引用本文： | 王平,李芳,杨清培,王福升. 基于Ripley's K函数和Taylor幂法则的江西省豚草种群空间分布的点格局分析[J]. 植物保护学报, 2019, 46(1): 130-135 |
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| 作者姓名： | 王平 李芳 杨清培 王福升 |
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| 作者单位： | 南京林业大学竹类研究所, 南方现代林业协同创新中心, 南京 210037,南京林业大学竹类研究所, 南方现代林业协同创新中心, 南京 210037,江西农业大学林学院, 南昌 330045,南京林业大学竹类研究所, 南方现代林业协同创新中心, 南京 210037 |
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| 基金项目： | 江苏高校优势学科建设工程项目 |
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| 摘 要： | 为了解豚草Ambrosia artemisiifolia L.的入侵机制和传播规律,选取江西省南昌市新建县上罗村一块5 m×5 m样地为研究区域,分析不同距离尺度下该研究区内豚草的空间分布格局,并采用Ripley’s K函数和Taylor幂法则对该研究区内豚草的分布类型进行定量分析。结果表明:在研究区内,豚草强度出现一个黄色区域,其值超过0.025株/cm~2;豚草种群在0～1.2 m空间距离尺度上呈极强的聚集性分布,且随着距离尺度的增大,聚集程度增强;泰勒幂指数b的估计值为1.5477,大于1.0000,说明研究区豚草呈现明显的聚集性分布。
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| 关 键 词： | 聚集性分布 入侵物种 线性回归 Ripley''s K函数 Taylor幂法则 |
| 收稿时间： | 2018-01-20 |
Point pattern analysis of spatial distribution of ragweed population in Jiangxi Province based on Ripley's K function and Taylor's power law |
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| Wang Ping,Li Fang,Yang Qingpei and Wang Fusheng. Point pattern analysis of spatial distribution of ragweed population in Jiangxi Province based on Ripley's K function and Taylor's power law[J]. Acta Phytophylacica Sinica, 2019, 46(1): 130-135 |
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| Authors: | Wang Ping Li Fang Yang Qingpei Wang Fusheng |
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| Affiliation: | Co-Innovation Center for the Sustainable Forestry in Southern China, Bamboo Research Institute, Nanjing Forestry University, Nanjing 210037, Jiangsu Province, China,Co-Innovation Center for the Sustainable Forestry in Southern China, Bamboo Research Institute, Nanjing Forestry University, Nanjing 210037, Jiangsu Province, China,College of Forestry, Jiangxi Agricultural University, Nanchang 330045, Jiangxi Province, China and Co-Innovation Center for the Sustainable Forestry in Southern China, Bamboo Research Institute, Nanjing Forestry University, Nanjing 210037, Jiangsu Province, China |
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| Abstract: | In order to understand the invasion mechanism and propagation law of ragweeds, a 5 m×5 m plot in Shangluo Village, Xinjian County, Nanchang City, Jiangxi Province was selected as the research area; the spatial distribution pattern of ragweeds in the research area was analyzed at different distance scales, and the distribution types of ragweeds were quantitatively analyzed with Ripley''s K function and Taylor''s power law. The ragweeds showed a yellow region with an intensity exceeding 0.025 plants/cm2. The ragweed population showed a strong clustering distribution at the given distance scales (from 0 to 1.2 m with an increment of 0.1 m), and the aggregation degree increased with increasing distance scale. The estimated value of Taylor''s power law exponent b was 1.5477, greater than 1.0000, and ragweeds showed obvious aggregation distribution in the research area. |
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| Keywords: | aggregated distribution alien invasive species linear regression Ripley''s K function Taylor''s power law |
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