菅瑞 马姜明 莫燕华 王永琪 秦佳双 潘小梅

摘 要： 為揭示桂林喀斯特石山檵木群落自然恢复过程中不同阶段主要物种种间相互作用变化规律，该文采用空间代替时间的方法，通过多物种间的总体关联显著性检验、χ2统计量分析和Spearman秩相关检验对桂林喀斯特石山檵木群落不同恢复阶段主要物种进行种间联结分析。结果表明：（1） 在灌木阶段，主要物种种间关系呈不显著负相关;在乔灌阶段，乔木层主要物种种间呈不显著负相关，灌木层主要物种种间呈不显著正相关;在小乔林阶段，乔木层和灌木层主要物种种间均呈不显著正相关。随着檵木群落的自然恢复，乔木层和灌木层正联结种对所占比例均呈上升的趋势，但这种正联结关系发展缓慢。（2） χ2统计量分析与Spearman秩相关系数检验均表明，檵木群落不同恢复阶段的乔木层和灌木层大部分物种种对间均未达到显著相关，种间联结较为松散，各个物种独立性较强。上述结果表明所研究的檵木群落3个阶段还是处于群落发展的相对较低的阶段。

关键词： 种间联结， 檵木群落， 桂林喀斯特石山， 恢复阶段， 乔木层， 灌木层

中图分类号： Q948

文献标识码： A

文章编号： 1000-3142（2021）05-0746-12

Inter-specific associations among restoration stages of Loropetalum chinense communities in karst hills of Guilin

JIAN Rui1，2，3， MA Jiangming1，2，3*， MO Yanhua1，2，3， WANG Yongqi1，2，3， QIN Jiashuang1，2，3， PAN Xiaomei1，2，3

（ 1. Institute for Sustainable Development and Innovation， Guangxi Normal University， Guilin 541006， Guangxi， China; 2. Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection， Ministry of Education， Guilin 541006， Guangxi， China;

3. College of Life Sciences， Guangxi Normal University， Guilin 541006， Guangxi， China ）

Abstract：  To reveal the interaction of Loropetalum chinense communities in karst hills of Guilin between different recovery stages of change， the typical sample plots were selected by the concept of space instead of time. Analysis about the inter-specific associations of main species at different restoration stages of the L. chinense communities in karst hills of Guilin was carried out by means of the significance test of the overall association among multi-species， the measurement of χ2 statistics and the Spearman rank correlation test. The results were as follows： （1） At the shrub stage， the overall inter-species relationship was no significant negative correlation. From shrub to tree stage， the overall inter-species relationship in the shrub layer was no significant positive correlation while that in the tree layer was no significant negative correlation. While at the small tree stage， the overall inter-species relationships in the shrub layer and tree layer were no significant positive correlation equally. In the process of natural restoration of L. chinense communities， the proportions of positive associative species in the tree layer and shrub layer showed an upward trend equally but was processed at a slow pace. （2） The results of the χ2 statistics and the Spearman rank correlation test showed that most species pairs in the tree layer and shrub layer were not significantly correlated. The inter-species association was relatively loose and each species was comparatively independent. The above results indicate that three stages in the L. chinense communities are still in a relatively low stage of community development.

Key words： inter-species association， Loropetalum chinense communities， karst hills of Guilin， restoration stage， tree layer， shrub layer

种间联结是指不同物种在空间分布上的相互关联性，能有效反映物种间的关系与相互作用，是植物群落重要的数量和结构特征之一，也是植物种群学和群落生态学的重要研究内容（王伯荪等，1995;张忠华等，2007）。由于不同物种对生境的需求不同，物种之间的相互关系也复杂多样，既有互助性的（Benard & Toft，2008），也有對抗性的（Jing et al.，2015）。……