山西霍山红柄白鹃梅群落特征的研究

Study on Exochorda Girraldill Community Characteristics in MT.Huoshan

采用样方法对山西霍山红柄白鹃梅群落进行调查,分析了红柄白鹃梅群落的种类组成、区系特点、群落外貌、垂直结构等群落学特征,计测了常见物种的重要值指标,并采用TW INSPAN双向指示种分析法对红柄白鹃梅群落划分群丛,计测不同群丛的S impson指数、Shannon-W iener指数、P ielou指数.结果表明:该群落共出现95种植物,隶属于39科77属,北温带分布属占优势,显示了红柄白鹃梅群落具有北温带性质.地面芽植物和高位芽植物是该群落的优势层片,反映了了本区夏季水热条件良好,冬季漫长、寒冷、干旱的气候特点.群落垂直结构可分为灌木层、草本层和地被层.根据TW INSPAN数量分类结果,可将霍山红柄白鹃梅群落53个样方划分为13个群丛,D指数、H指数和J指数在描述群丛性质、结构和数量特征时具有较好的一致性.

The Exochorda girraldill community on Mt.Huoshan was investigated by sampling method.Based on the data,the community characteristics were analyzed about the specific composition,the flora feature,the community physiognomy and the vertical structure.The common species important value of E.girraldill community was measured in the sampling stands.The community formation was classified into associations by Two-way Indicator Species Analysis(TWINSPAN),and the species diversity(Simpson index;Shannon-Wiener index and Pielou index) was measured in E.girraldill community in the different associations.The results are as follow.The community is composed of 95 species belonging to 39 families and 77 genera,and it can be the feature of North Temperate Zone with the genus of boreal temperate zone being absolute dominance.The species and quantity of hemicryptophyte and phanerophytes were showed to the area feature for distribution of E.girraldill community where temperature and rainfall are moderate in summer,but cold and dry in winter.The community can be structurally divided into shrub layer,herbaceous layer and ground layer.According to the results of TWINSPAN,53 samples were classified 13 associations,and the indices of D,H and J demonstrated higher consistency.