阔叶红松林群落优势树种生态位和种间联结  

Niche and Interspecific Association of Dominant Tree Species in Broad-leaved Pinus koraiensis Forest Community

作　　者：刘玉臣 LIU Yu-chen(National Forestry and Grassland Administration Key forest Resources Monitoring Center in National Forest Areas,Jiagdaqi 165000)

机构地区：[1]国家林业和草原局重点国有林区森林资源监测中心,加格达奇165000

出　　处：《温带林业研究》2023年第2期36-42,共7页Journal of Temperate Forestry Research

摘　　要：【目的】通过分析小兴安岭阔叶红松林群落优势树种重要值、生态位、种间联结等关系,研究了阔叶红松林群落优势树种的组成特征和种间相互作用。【方法】利用Levins指数(B_(L))、Shannon指数(B_(S))、Pianka重叠指数(O_(ik))、方差比率(VR)、χ^(2)检验、联结系数(AC)及Pearson相关检验的方法。【结果】结果表明:红松、青楷槭和花楷槭是阔叶红松林群落的主要优势树种,红松的生态位宽度最大;在11个优势树种55组种对中,生态位重叠大于0.50的共26对,占总数的47.27%,说明阔叶红松林群落中优势树种间的生态位分化程度一般;方差比率(VR)大于1,说明阔叶红松林群落中优势树种间整体上呈现正联结,群落处于相对稳定阶段;χ^(2)检验、联结系数(AC)及Pearson相关检验均显示,种间联结的显著性较低,种间独立性较强。【结论】阔叶红松林群落优势树种对资源的利用较为充分,生态位分化程度一般。群落乔木层优势树种间负相互作用占优势,但这种负相互作用的强度较低。【Objective】By analyzing the important value,ecological niche and interspecific association of dominant species in broad-leaved Pinus koraiensis forest community in Xiaoxing'an Mountains,the composition characteristics and interspecific interactions of dominant tree species in the broad-leaved Pinus koraiensis forest community were studied.【Method】In this paper,Levins Index(B_(L)),Shannon index(B_(S)),Pianka Overlap Index(O_(ik)),variance ratio(VR),Chisquare test,connection coefficient(A_(C))and Pearson correlation test were used.The niche and interspecific association of dominant tree species in broad-leaved Pinus koraiensis forest community were studied.【Result】The results showed that Pinus koraiensis,Acer tegmentosum and Acer ukurunduense were the dominant species in the broad-leaved Pinus koraiensis community,and the niche width of Pinus koraiensis was the largest.Among the 55 species pairs of 11 dominant tree species,26 pairs(47.27%)had niche overlaps greater than 0.50,indicating that the niche differentiation among the dominant tree species in the broad-leaved Pinus koraiensis forest community was general.The variance ratio(VR)was greater than 1,indicating that the dominant tree species in the broad-leaved Pinus koraiensis forest community showed positive association on the whole,and the community was in a relatively stable stage Chi-square test,association coefficient(AC)and Pearson Correlation Test showed that interspecific association was less significant and interspecific independence was stronger.【Conclusion】The dominant tree species in broad-leaved Pinus koraiensis forest community made full use of resources.The ecological niche differentiation degree was general.The dominant tree species in the community had a dominant negative interaction with each other.But the intensity of this negative interaction was relatively low.

关 键 词：阔叶红松林 生态位 生态位重叠 种间联结 

分 类 号：S718.5[农业科学—林学]