山西大同煤矸石山自然定居植物群落数量分类与排序分析

Quantitative Classification and Ordination of Naturally Colonized Plant Communities on Yongdingzhuang Coal Gob Piles in Datong,Shanxi

应用双向指示种分析法(TWlNSPAN)和除趋势对应分析法(DCA),对山西大同永定庄煤矸石山自然定居植物群落生态关系进行研究,将该矸石山81个样方划分为13个群丛,分别位于不同的海拔高度.DCA二维排序较好地验证了自然定居植物群落类型及优势种的分布与环境因子之间的关系,样方的DCA排序和优势种的DCA排序说明了矸石山表层养分含量、坡向是影响自然定居植物群落分布和变化的主要环境因子.81个样方的物种多样性指数与DCA第一、二轴的特征值有很好的相关性,说明了表层养分含量、坡向对矸石山自然定居植物群落的物种多样性影响显著.

Based on the field investigation,Two-way indicator species analysis（TWINSPAN） and Distended correspondence analysis（DCA） were adopted to conduct naturally colonized plant communities of Yongdingzhuang coal gob piles in Datong,Shanxi.TWINSPAN classified 81 samples of the coal gob piles into 13 associations which locate at different altitude and the slope.DCA were applied to verify the relationship of the distribution of naturally colonized plant communities and the dominant species and environmental factors.The result of DCA ordination indicated that the surface nutrient content of coal gob piles and the slope were the dominant ecological factors responsible for the distribution and succession of naturally colonized plant communities in the area.Species diversity indexes of 81 quadrats have closely correlation to eigenvalue of the first axis and the second axis of DCA,which indicate that the mantle of soil nutrient content and the slope can significantly affect species diversity of naturally colonized plant communities.