摘要
【目的】探索岩溶石漠化程度与植物群落及其演替阶段的一致性和同步性关系,研究划分演替阶段的定量依据。【方法】以粤北岩溶石漠化各发展阶段对应的植物群落为对象,用逐点模糊有鉴分类和λ截集分析优势种消长关系的方法研究定量划分植物群落演替阶段。【结果】粤北岩溶石漠化植被的演替系列由模糊子集构成4个演替阶段,各阶段的特征主要反映在种类成分优势度的更替上。每个演替阶段植物种群的优势程度及其优势地位取决于λ阈值(0≤λ≤1),群落的种类成分随λ值减少呈增加趋势。【结论】用演替系列中优势种重要值换算的隶属度函数作指标,用逐阶段有鉴分类方法及λ水平集作为划分演替阶段的定量依据,既可以明显地区分出各阶段的优势种,还可证明随着石漠化程度加重及演替阶段更替造成了优势种种群之间的消长关系。
【Objective】This study aimed to investigate the consistency and synchronization between rocky desertification levels and the plant community,as well as the stage of plant succession,in order to es-tablish a quantitative standard for delineating plant succession stages.【Method】Plant communities at vari-ous stages of succession during rocky desertification in the Karst region of northern Guangdong Province were examined.The study employed fuzzy mathematics methods andλfuzzy-cut analysis to assess the dy-namics of dominant species for categorizing plant succession stages.【Result】The results revealed that the plant community’s succession process in the rocky desertification areas of the Karst region in northern Guangdong Province encompassed four distinct succession stages.Each stage was characterized by changes in the dominance of plant species.The dominance of plant species was influenced by theλvalue(0≤λ≤1),with plant species composition increasing as theλvalue decreased.【Conclusion】With the membership function derived from the significance of dominant species in the succession series as an indicator,and the fuzzy mathematics method andλfuzzy-cut analysis as a quantitative standard for delineating plant succes-sion stages,this combined approach can effectively identified dominant species throughout the plant succes-sion stages,offering insights into dynamic changes caused by rocky desertification progression and the shift in plant succession stages.
作者
宋立天
SONG Litian(Shenzhen Municipal Design&Research Institute Co.,Ltd.,Shenzhen 518000,China)
出处
《甘肃农业大学学报》
CSCD
北大核心
2024年第6期267-274,283,共9页
Journal of Gansu Agricultural University
基金
深圳市战略新兴产业发展专项资金项目(CXZZ20120831141454246)。
关键词
岩溶石漠化
植物群落
植被演替
演替阶段
优势种消长
rocky desertification
plant community
plant succession
succession stage
dominant species dynamic
