摘要 【目的】生态位及种间关系是研究群落结构的主要方法,为研究太行山南段油松林火烧迹地不同恢复期草本植物群落的结构特征,探索其动态变化规律。【方法】本文以恢复13年(S1)、7年(S2)、6年(S3)和1年(S4)的4个火烧迹地草本植物优势种为研究对象,着重研究不同恢复阶段优势种的生态位和种间关联特征,计测其生态位宽度、生态位重叠值,同时通过总体相关性检验、χ2检验和Spearman秩相关性检验研究其种间关系,并划分生态种组。【结果】大披针薹草、小红菊和白莲蒿在各个恢复期的优势度、生态位宽度与生态位重叠值均较大。总体相关性检验表明,S1为显著正关联,S2和S4为显著负关联,S3为不显著正关联。χ2检验表明,S1、S2、S3和S4的正负关联比分别为2.33、0.69、0.84和0.63。Spearman秩相关性检验表明,S1的正关联种对数大于负关联种对数,而S2、S3和S4的正关联种对数小于负关联种对数。生态种组划分表明S1、S2、S3的优势种基本可以划分为以大披针薹草+小红菊、白莲蒿以及其他优势种为代表的3个生态种组,S4的10个优势种所划分的3个生态种组则主要以大披针薹草、小红菊和白莲蒿为代表。【结论】生态位与种间关系研究表明,太行山南段火烧迹地草本植物群落在恢复13年时稳定性最大,有助于更好地理解火烧迹地物种间的相互作用、共存、分布等相关机制,同时可为火烧迹地规划管理与植被恢复过程中植物配置提供理论支撑。 [Objective]Niche and interspecific association are the basis and main method to study community structure.The purpose of this paper was to study the structural characteristics and dynamic changes in herb layer of burned Pinus tabuliformis forest in the southern Taihang Mountains at different restoration stages.[Method]We focus on the niche characteristics and interspecific associations of the dominant species of herb layer plants in four burned areas of 13 years(S1),7 years(S2),6 years(S3)and 1 year(S4),then we calculated the niche width and niche overlap,and studied the interspecific association through the overall association test,χ2 test and Spearman rank correlation test.Then the ecological species groups were divided.[Result]The dominance,niche width,and niche overlap of dominant species Carex lanceolata,Chrysanthemum chanetii and Artemisia stechmanniana were larger in different restoration periods.The overall association test showed that S1 was a significantly positive association,S2 and S4 were a significantly negative association,and S3 was an insignificantly positive association.χ2 test showed that the positive and negative association ratios of S1,S2,S3 and S4 were 2.33,0.69,0.84 and 0.63.Spearman rank correlation test showed that the number of positive association pairs in S1was greater than that of negative association pairs,while the number of positive association pairs in S2,S3 and S4 was less than the number of negative association pairs.The dominant species in S1,S2 and S3 can be divided into three ecological species groups represented by Carex lanceolata+Chrysanthemum chanetii,Artemisia stechmanniana and other dominant species.And 10 dominant species in S4 can be divided into three ecological species groups represented by Carex lanceolata,Chrysanthemum chanetii and Artemisia stechmanniana.[Conclusion]Herb plant community in the burned area of southern Taihang Mountain has the greatest stability after 13 years of recovery.The niche and interspecific association may illuminate the interacti
机构地区 长治学院生物科学与技术系
出处 《北京林业大学学报》 CAS CSCD 北大核心 2021年第4期35-46,共12页 Journal of Beijing Forestry University
基金 山西省1331重点学科建设项目(1331KSC) 山西省重点学科建设项目(FSKSC) 长治学院校级项目(XJ2020002401)。
关键词 生态位宽度 生态位重叠 χ2检验 Spearman检验 生态种组 niche width niche overlap χ2 test Spearman rank correlation test ecological species group
