浙江松阳县生态公益林群落分类排序及优势种种间关联分析

  目的  对浙江松阳县生态公益林群落进行分类和排序，探讨多样性变化规律及种间关系，有助于揭示植物群落和多样性在复杂环境梯度上的分布规律。  方法  以松阳县重点公益林128个固定监测样地为研究对象，利用双向指示种分析(TWINSPAN)、典范对应分析(CCA)、物种多样性指数及种间联结分析等对该县公益林群落特征展开研究。  结果  TWINSPAN结果显示:松阳公益林群落可分为6种群丛类型。CCA结果显示:松阳县公益林群落分布和类型在环境梯度上呈现明显的分异规律，其主要受到海拔、土壤类型和坡向的影响。物种多样性结果表明:针阔混交林和阔叶林为主导的群丛Shannon-Wiener指数和Simpson指数显著高于其他群丛，以毛竹Phyllostachys edulis为主导的群丛多样性显著低于其他群丛。种间联结分析显示:样地内大多数乔木树种呈现不显著联结，正负关联比为1.9，说明群落整体稳定。  结论  松阳县公益林应进行差别化管理，积极推广针叶林混交化和阔叶化。可考虑对不同立地条件不同林分的公益林进行不同的补植措施，对毛竹林进行边缘控制，对一些能适应各类环境的群落组合进行适当推广。图4表3参37

Classification,ordination and correlation analysis of dominant species of ecological non-commercial forests in Songyang,Zhejiang

  Objective  This study aims to indicate the distribution of forest community and species diversity on the gradients of complex environment by classifying and sorting the community of ecological non-commercial forest in Songyang County, Zhejiang Province, and discussing the change law of diversity and interspecific relationship.  Method  Taking 128 monitoring plots as research projects, two-way indicator species analysis (TWINSPAN), canonical correspondence analysis (CCA), species diversity index and interspecific association analysis were used to study the community characteristics of non-commercial forest in Songyang County.  Result  TWINSPAN results showed that the forest community could be divided into 6 types. CCA results demonstrated that the community distribution and types of non-commercial forest in Songyang County showed obvious differentiation on environmental gradient, which was mainly affected by altitude, soil type and slope aspect. The results of multiple comparison of species diversity showed that the Shannon-Wiener index and Simpson index of associations with mixed forest or broad-leaved forest were significantly higher than those of other associations, and the diversity of association dominated by Phyllostachys edulis was significantly lower than that of other associations. Interspecific Association Analysis illustrated that most tree species in sample plots had no significant correlations. The positive and negative correlation ratio was 1.9, indicating the overall stability of the community.  Conclusion  Differential management should be carried out for the non-commercial forest in Songyang County, and mixed and broad-leaved forests should be actively promoted. It is possible to consider different supplementing measures for the non-commercial forests with different site conditions and different stands. The edge control of bamboo forests and community combinations that can adapt to various environments should be properly promoted. Ch, 4 fig. 3 tab. 37 ref.]