缙云县公益林群落数量分类与排序

Numerical classification and ordination of public welfare forest communities in Jinyun

运用双向指示种分析法(TWINSPAN)和典型相关分析(CCA)方法,从植物群落和环境变量关系的角度,分析浙江省缙云县公益林群落立地条件对植物分布格局的影响。结果表明:148个公益林监测样地经过二元指示种分析,大致被划分为17类群丛,其中以马尾松Pinus massoniana和杉木Cunninghamia lanceolata作为主要优势种的群丛数量最多,占47.1%;CCA排序揭示了群落在该区的分布格局受到海拔和坡度影响最为主要。以缙云县公益林为对象,基于地形因子与群落空间分布格局的关系,将公益林群落划分为17个不同生活类型的群丛,探寻一套适合缙云县群落单元划分的方案。

In order to explore the relationship between the spatial distribution pattern of public forest communi-ties and environmental factors, the 148 plots （20 m × 20 m for each） of public welfware forest in Jinyun were studied by two-way indicator species analysis （TWINSPAN） and canonical correspondence analysis （CCA）. The results showed that 148 plots could be divided into 17 groups by TWINSPAN, which reflected that the group of Pinus massoniana and Cunninghamia lanceolata as constructive species were the dominant communi-ties in Jinyun. The result of CCA revealed that the elevation and the slope were the main determinants of com-munity distribution in the area. Quantitative classification and CCA can be used to conduct a comprehensive analysis of the relationship between distribution patterns of vegetation and environment and therefore will pro-vide more scientific and reasonable basis for the classification of public welfare forest management units. （Ch, 3 fig. 3 tab. 16 ref.]