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当前位置: 首页 > 文章 > 基于Ripley K(r)函数的金露梅与蒲公英种群空间分布格局及其关联性 生态学杂志 2018 (7) 1925-1931
Position: Home > Articles > Spatial distribution and association of Potentilla fruticosa and Taraxacum mongolicum based on Ripley's K(r) function Chinese Journal of Ecology 2018 (7) 1925-1931

基于Ripley K(r)函数的金露梅与蒲公英种群空间分布格局及其关联性

作  者：
刘旻霞;李文;连依明
关键词：
亚高寒草甸;Ripley K函数;金露梅;蒲公英;空间格局;空间关联
摘  要：
物种空间分布格局和种间关联性是研究种群特征、种间相互影响以及物种同环境关系的重要方法。金露梅(Potentilla fruticosa L.)与蒲公英(Taraxacum mongolicum Hand.-Mazz.)是甘南亚高寒草甸的主要物种,通过野外群落调查,应用点格局方法中的Ripley K函数,分析不同坡向的金露梅与蒲公英种群的空间分布格局及种间关联性。结果表明:金露梅与蒲公英在3个坡向上的分布具有明显差异,随着坡向由北坡向南坡的转变,金露梅种群呈现递减趋势,蒲公英种群则呈现出递增趋势;在北坡,金露梅在0~4.8 m内呈现聚集分布且聚集程度比较高,在4.8~5 m呈现随机分布;在西坡,金露梅在0~0.6 m尺度内表现出随机分布,在0.6~1.6 m尺度内为聚集分布,在1.6~5 m尺度内则又再次呈现随机分布;而在南坡,金露梅在整个研究尺度范围内均呈现随机分布;北坡的蒲公英在0~2.8 m尺度上呈现聚集分布,在2.8~5 m内呈现随机分布;西坡和南坡上蒲公英在整个研究尺度内都呈现随机分布;北坡的金露梅与蒲公英在整个研究尺度内呈现负关联,西坡两种群在整个尺度内呈现无关联;南坡的金露梅与蒲公英在0~2.4 m尺度内呈现无关联,在2.4~5 m尺度内呈现负关联。
译  名：
Spatial distribution and association of Potentilla fruticosa and Taraxacum mongolicum based on Ripley's K(r) function
作  者：
LIU Min-xia;LI Wen;LIAN Yi-ming;College of Geography and Environmental Science,Northwest Normal University;
单  位：
LIU Min-xia%LI Wen%LIAN Yi-ming%College of Geography and Environmental Science,Northwest Normal University
关键词：
subalpine meadow;;Ripley's K(r) function;;Potentilla fruticosa;;Taraxacum mongolicum;;spatial pattern;;spatial association
摘  要：
The analysis of spatial distribution and association of species is an important method to study population characteristics,interspecific interaction,species and environmental relationship.Potentilla fruticosa and Taraxacum mongolicum are two major species of subalpine meadow in Gannan. We analyzed the field spatial distribution and interspecific association of P. fruticosa and T. mongolicum on different slopes using Ripley 's K( r) function. The results showed that the distribution of P. fruticosa and T. mongolicum were obviously different in three slope aspects. P.fruticosa population showed a decreasing trend,while T. mongolicum population showed an increasing trend from north to south aspect. On the north aspect,P. fruticosa showed a relatively high degree of aggregation at 0-4.8 m scale and a random distribution at 4.8-5 m scale. On the west aspect,P. fruticosa showed a random distribution at 0-0.6 m scale,aggregate distribution at 0.6-1.6 m scale,and random distribution again at 1.6-5 m scale. On the south aspect,P. fruticosa showed a random distribution throughout the study scales. T. mongolicum showed aggregation distribution at 0-2.8 m scale,random distribution at 2.8-5 m scale on the north aspect,and a random distribution at the whole study scales on the west aspect and south aspect. P. fruticosa and T. mongolicum showed a negative correlation at any scale on north aspect. Both species had no association at the whole study scales on the west aspect. On the south aspect,P. fruticosa and T.mongolicum showed no correlation at 0-2.4 m scale,and a negative correlation at 2.4-5 m scale.

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