历山自然保护区千金榆群落数量分类与排序研究

Quantitative Classification and Ranking of Carpinus Cordata Community in Lishan Nature Reserve

文章以野外调查的40个样地数据为基础,应用双向指示种分析法(TWINSPAN)将历山自然保护区千金榆群落分为7个群丛:Ⅰ.千金榆—山胡椒+小花溲疏—糙苏群丛(Ass.Carpinus cordata—Lindera glauca+Deutzia parviflora—Phlomis umbrosa);II.千金榆—小花溲疏—鹿药+糙苏群丛(Ass.Carpinus cordata—Deutzia parviflora—Smilacina japonica+Phlomis umbrosa);Ⅲ千金榆—六道木—舞鹤草群丛(Ass.Carpinus cordata—Abelia biflora—Maianthemum bifolium);Ⅳ千金榆—土庄绣线菊—鹿药群丛(Ass.Carpinus cordata—Spiraea pubescens—Smilacina japonica);Ⅴ千金榆—小花溲疏—淫羊藿群丛(Ass.Carpinus cordata—Deutzia parviflora—Epimedium brevicornu);Ⅵ千金榆—小花溲疏-披针苔草群丛(Ass.Carpinus cordata—Deutzia parviflora—Carex lancifolia);Ⅶ千金榆—接骨木—淫羊藿群丛(Ass.Carpinus cordata—Sambucus williamsii—Epimedium brevicornu)。千金榆群落样方的DCA排序图第一轴(横坐标)反映了千金榆群落坡向从半阳坡→半阴坡→阴坡的变化,这说明光照与温度和水分的差异是影响出群落分布的主要因子,但第二轴(纵坐标)并未反映出环境因子与群落的明显关系。

Based on the data of 40 sample plots investigated in the field,the community of Carpinus cordata in Lishan Nature Reserve was divided into 7 clusters by using two-way indicator species analysis(TWINSPAN):Ⅰ.Carpinus cordata-Lindera glauca+Deutzia parviflora-Phlomis umbrosa;Ⅱ.Carpinus cordata-Deutzia parviflora-Smilacina japonica+Phlomis umbrosa;Ⅲ.Carpinus cordata-Abelia biflora-Maianthemum bifolium;Ⅳ.Carpinus cordata-Spiraea pubescens-Smilacina japonica;Ⅴ.Carpinus cordata-Deutzia parviflora-Epimedium brevicornu;Ⅵ.Carpinus cordata-Deutzia parviflora-Carex lancifolia;Ⅶ.Carpinus cordata-Sambucus williamsii-Epimedium brevicornu.The results showed that:The first axis(abscissa)of DCA sequence map of the sample plots of Carpinus cordata community reflects the change of slope direction of Carpinus cordata community from semi-sunny slope to semi-shady slope,and then to shady slope,which indicates that the difference of light,temperature and water is the main factor affecting the distribution of the community,but the second axis(ordinate)does not reflect the obvious relationship between environmental factors and the community.