岑王老山常绿落叶阔叶混交林群落优势种种间联结性与种间相关性分析

种间联结及种间相关性能够反映植物群落中物种间的关系和群落的稳定程度,对植被的恢复与重建、生物多样性保护等具有重要的意义和价值。本研究基于岑王老山1hm2样地中胸径大于1cm的每木调查数据,采用方差比率法(VR)、种间联结(AC)系数、Ochiai指数、Pearson相关系数、Spearman秩相关系数以及PCA排序,对群落中13个优势树种的种间联结性和种间相关性进行分析,并进行生态种组的划分。结果显示:(1)群落总体呈现显著正联结,表明群落正处于演替的稳定阶段;(2)种间联结性与种间相关性分析中的正负关联比均未超过1,但达到显著正关联的种对数明显大于达到显著负关联的种对数,说明群落整体联结性与群落中达到显著关联的种对数关系更为密切;(3)相关性检验中虽然结果相似,但Spearman秩相关检验的结果更为灵敏;(4)生态种组的划分与相关性检验表现出一致性,说明物种的生态学特性以及对资源的利用方式对其种间关系具有较大的影响。

Analysis of Inter-species Association and Inter-species Correlation of Dominant Trees in Evergreen and Deciduous Broad-leaved Mixed Forest in Mt.Cenwanglaoshan

Inter-species association and inter-species correlation can reflect the relationships between species in plant communities and the stability of communities,and have important significance and value for the restoration and reconstruction of vegetation and biodiversity protection.Based on the survey data of every tree with DBH greater than 1 cm in the 1 hm² plot of Mt.Cenwanglaoshan community,this study used the ratio of variance (VR),interspecies association (AC) coefficient,Ochiai index,Pearson correlation coefficient,Spearman rank correlation coefficient and PCA sequencing to analyze the interspecific connectivity and interspecific correlation of 13 dominant species in the community,and divided ecological species into groups.The results showed that:(1) The community as a whole showed a significant positive association,indicating that the community was in a stable stage of succession.(2) The positive and negative correlation ratios in the analysis of inter-specific linkage and inter-specific correlation did not exceed 1,but the species logarithm that reached a significant positive correlation was significantly greater than species logarithm that reached a significant negative correlation,which showed that the overall connectivity of the community was more closely related to the logarithm of the species that had reached a significant correlation.(3) Although the results of the correlation test were similar,the results of the Spearman rank correlation test were more sensitive.(4) The classification of ecological species and groups showed consistency with the correlation test,indicating that the ecological characteristics of species and the utilization way of resources had a great influence on the inter-species relationship.