汾河太原段河温滩草地植被的数量分类与排序

采用双向指示种分析法和除趋势对应分析法对汾河太原段河漫滩草地植被做了分类和排序研究，结果将汾河太原段草地群落划分为17个群系，并论述了各群系的特征。DCA排序进一步说明了群系的分布格局与土壤水分、质地和人为干扰的密切关系。种的DCA排序结果证明对群落生境有明确的指示作用，能客观反映群落的生境特征，此外，还讨论了群落的演替趋势。

A study on the numerical classification and ordination of grassland vegetation in flood plain of the Fen river in Taiyuan

The classification and ordination of the grassland vegetation in flood plain of the Fen river in Taiyuan were studied using two?way indicator species analysis(TWINSPAN) and detrended correspondence analysis(DCA). Sixty samples collected from in flood plain of the Fen river were classified into 17 associations by TWINSPAN. The community characteristics of every association were described. The result of DCA ordination indicated that there were obvious relationships between the distribution pattern of associations and soil water content, soil texture, artificial perturbation. Furthermore, the analysis of DCA proved the continuous change of vegetation and the environmental variation. DCA ordination of species showed that species acted as indicator for habitat factors and was impersonally reflected characteristics of biotope. Moreover, the dynamic succession tendency of the grassland vegetation in flood plain of the Fen river are discussed.