山西五鹿山自然保护区辽东栎群落木本植物种间数量关系

Interspecific relationship of woody plants in Quercus wutaishanica community in Wulu Mountain Nature Reserve, Shanxi Province of China: A quantitative analysis

基于2×2联列表,应用方差比率法、χ2检验、Pearson相关系数及Spearman秩相关系数检验等数量分析方法对山西五鹿山自然保护区辽东栎群落的27个优势种,共351个种对间的关联性进行定量研究。方差分析表明,27个优势种群的总体种间关联性呈不显著关联,种的分布相对独立。χ2检验结果有154个种对呈正相关,188个种对呈负相关,正负关联比为0.82;Pearson相关系数检验有124个种对呈正相关,226个种对呈负相关,正负关联比为0.55;Spearman秩相关系数检验有151个种对呈正相关,200个种对呈负相关,正负关联比为0.76;与χ2检验相比,Pearson相关系数和Spearman秩相关系数检验具有较高的灵敏度。351个种对中,绝大多数种对的联结关系未达到显著水平,说明五鹿山自然保护区辽东栎群落具有明显的次生性。根据这27个优势种群对环境的适应方式和主导生态因素辅助以PCA排序,可将它们划分为3种生态种组。

Based on 2 × 2 contingency table, and by using quantitative analysis methods, this paper studied the interspecific relationship among 351 species pairs of 27 dominant woody species in Quercus wutaishanica community in Wulu Mountain Nature Reserve. Variance analysis showed that the interspecific correlation of the 27 dominant populations was not significant, and the distribution of the species was relatively independent. The χ2 test showed that among the 351 species pairs, 154 pairs were positively while 188 pairs were negatively correlated, and the correlation ratio was 0.82. Pearson’s correlation coefficient test showed that 124 pairs were positively while 226 pairs were negatively correlated, and the correlation ratio was 0.55. Spearman’s rank correlation coefficient test showed that 151 pairs were positively while 200 pairs were negatively correlated, and the correlation ratio was 0.76. Compared with χ2 test, the Pearson’s correlation coefficient and Spearman’s rank correlation coefficient tests had higher sensitivity. For vast majority of the 351 species pairs, their interspecific relationship did not reach significant level, indicating that the Q. wutaishanica community in Wulu Mountain Nature Reserve was of obviously secondary succession. According to the adaptation to the environment and the leading ecological factors, and assisting with principal components analysis, the 27 dominant populations were divided into three ecological species groups.