哀牢山植物群落数量分类与排序

Quantitative classification and ranking of plant communities in Ailao Mountain

为了明确影响哀牢山植物群落分布的主要环境因子,本研究采用双向指示种分析(TWINSPAN)和典范对应分析(CCA),对研究区45个样方分布与环境因子之间的生态关系进行数量分类与排序。结果表明,TWINSPAN分类将45个样地点中170个物种划分为7个群丛,其中群丛Ⅲ的物种多样性最丰富,群丛Ⅴ物种多样性最单一,仅包括11和20号样地中的18个物种;CCA排序结果表明,海拔是哀牢山植物群落分布的主要影响因素,其次是孔隙度和温度,土壤有机质和土壤全磷对植物群落分布影响不明显。哀牢山植物群落数量分类变化的分析对揭示植物群落空间分布特征和植物种质资源调查及其保护具有重要的意义。

In order to determine the major environmental factors affecting plant community distribution in Ailao Mountain,two-way indicator species analysis(TWINSPAN)and canonical correspondence analysis(CCA)were used to quantitatively classify and sequence the ecological relationships between 45 communities and environmental factors in study area.The results showed that,170 species from 45 quadrats were divided into 7 clusters by TWINSPAN classification.ClusterⅢhad the most abundant species diversity,while clusterⅤhad the most unitary species diversity,including only 18 species from plots 11 and 20.The results of CCA sequencing showed that,elevation was the main factor affecting the distribution of plant community in Ailao Mountain,followed by porosity and temperature.Soil organic matter and soil total phosphorus had no significant effect on the distribution of plant community.The analysis of the change of plant community quantity classification in Ailao Mountain is of great significance for revealing the spatial distribution characteristics of plant community and the investigation and protection of plant germplasm resources.