贵州茅台水源功能区植物群落的分类和排序

Classification and Ordination of Plant Community in the Maotai Water Functional District

为给植被生态保护和植物群落后期的结构调整提供理论依据,选择贵州茅台水源功能区典型植物群落样方57个,采用TWINSPAN分类和DCA排序对茅台水源区植物群落分类、植物群落、物种与环境间的生态关系进行分析。结果表明:1)TWINSPAN分类将57个样方划分为11个群丛,并在样方DCA二维排序图上得到了很好的印证。2)群落样方DCA排序表明,土壤水分和坡向是贵州茅台水源功能区植物群落分布的主导因子。3)物种DCA排序表明,土壤水分和光照对植物分布起关键作用,排序轴对角线反映群落中物种在各群落类型中的替代关系。群落样方、物种DCA的排序结果揭示了物种的分布格局和群落的分布格局具有很大的相似性。

To provide theoretical basis for the plant ecological protection and the structural adjustment of plant community in later period, the ecological relationships between plant communities and environment, as well as species and environment were analyzed, using TWINSPAN classification and DCA ordination, based on 57 typical plant community quadrates in the Moutai water functional district. The results showed that： 1） The plant communities were classified into 11 association types by TWINSPAN classification, and they were further verified in the DCA two-dimensional ranking diagram. 2） The DCA ordination indicated that soil moisture and slope direction were the dominate factor of the plant community distribution. 3）The main ecological factors which affected the distribution of plant were soil moisture, light intensity according to the plant DCA sequencing result, and the diagonal line of ordination diagram of DCA indicated the substitution relation of species which exposited that there was great similarity between the distribution of species and plant communities.