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历山青檀天然群落乔木层优势种种间关系

李豪1,李昱2,张直峰1,都勇海1,冯飞1,李晓丽1,毕润成1**   

  1. (1山西师范大学生命学院, 山西临汾 041000; 2吕梁学院外语系, 山西离石 033000)
  • 出版日期:2013-06-10 发布日期:2013-06-10

Interspecific relationships of dominant species in tree layer of natural Pteroceltis tatarinowii community in Lishan, Shanxi Province of China.

LI Hao1, LI Yu2, ZHANG Zhi-feng1, DU Yong-hai1, FENG Fei1, LI Xiao-li1, BI Run-cheng1**   

  1. (1College of Life Science, Shanxi Normal University, Linfen 041000, Shanxi, China; 2Department of Foreign Languages, Luliang University, Lishi 033000, Shanxi, China)
  • Online:2013-06-10 Published:2013-06-10

摘要: 采用样方调查法,在分析历山青檀群落结构的基础上,测定了优势种的种间协变系数,并将典范对应分析和聚类分析相结合,探讨了历山青檀与群落中其他物种的种间关系。结果表明:(1)历山青檀群落以A级频度(1%~20%)占绝对优势,青檀在群落中占据优势地位,但在演替层和更新层中的优势不及其他优势树种;(2)Spearman秩相关分析和Pearson相关分析的结果基本一致,历山青檀群落乔木层物种间正协变种对数少于负协变的种对数,青檀和君迁子种对间负协变程度最高,且在所有包含青檀的显著或极显著协变种对中,青檀与另一个物种间总是显著或极显著的负相关。(3)坡度、土壤含水量及枯枝落叶层厚度与3个排序轴相关性强,18个乔木优势种沿第2排序轴的分类与物种的性状特征较为相符,土壤含水量是影响历山青檀分布的主导因素。(4)聚类分析把历山青檀群落乔木层优势种分为3大类。

关键词: 空间变异, 有机碳, 固碳速率, 黄海海平原

Abstract: Based on the quadrat survey and the analysis of Pteroceltis tatarinowii community structure in Lishan, this paper measured the interspecific covariation coefficients of dominant species, and, in combining with canonical correspondence analysis and cluster analysis, approached the interspecific relationships between P. tatarinowii and other species. In the study area, the A class frequency (1%-20%) of P. tatarinowii community occupied the absolute superiority. P. tatarinowii occupied the dominant position in the community, but the dominance in succession layer and regeneration layer was inferior to that of other species. The results of Spearman rank correlation analysis and Pearson correlation analysis were basically consistent, i.e., the number of positive covariation couplets in tree layer was lower than that of negative covariation couplets, the negative covariation between the couplets P. tatarinowii and Diospyros lotus was the highest, and in all of the significant or positively significant covariation couplets that contained P. tatarinowii, the P. tatarinowii and another species were always in significant or very significant negative correlation. Slope, soil moisture content, and litter thickness had strong correlations with 3 ordination axes, the classification of 18 dominant tree species along the second axis was more consistent with the characteristics of the species, and soil moisture content was the dominant factor affecting the distribution of P. tatarinowii. Cluster analysis showed the dominant tree species in the tree layer of P. tatarinowii community could be divided into three categories.

Key words: Huang-Huai-Hai Plain, soil organic carbon, spatial variability, sequestration rate.