| 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.植物保护学报,2019,46(1):130-135 |
| DOI：10.13802/j.cnki.zwbhxb.2019.2019916 |
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| 中文摘要: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/cm2；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。 |
| 中文关键词:聚集性分布 入侵物种 线性回归 Ripley's K函数 Taylor幂法则 |
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| Point pattern analysis of spatial distribution of ragweed population in Jiangxi Province based on Ripley's K function and Taylor's power law |
| Author Name | Affiliation | E-mail | | Wang Ping | Co-Innovation Center for the Sustainable Forestry in Southern China, Bamboo Research Institute, Nanjing Forestry University, Nanjing 210037, Jiangsu Province, China | | | Li Fang | Co-Innovation Center for the Sustainable Forestry in Southern China, Bamboo Research Institute, Nanjing Forestry University, Nanjing 210037, Jiangsu Province, China | | | Yang Qingpei | College of Forestry, Jiangxi Agricultural University, Nanchang 330045, Jiangxi Province, China | | | Wang Fusheng | Co-Innovation Center for the Sustainable Forestry in Southern China, Bamboo Research Institute, Nanjing Forestry University, Nanjing 210037, Jiangsu Province, China | 854514564@qq.com |
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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. |
| keywords:aggregated distribution alien invasive species linear regression Ripley's K function Taylor's power law |
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