江淮丘陵大蜀山大叶榉群落学特征

在对江淮丘陵合肥大蜀山大叶榉(Zelkova schneideriana)典型群落调查的基础上,分析了该群落植物组成、生活型特征、层次结构以及优势种群年龄结构和发展动态。结果表明,群落内共出现维管束植物28科45属49种。植物区系地理成分主要由热带和温带区系成分组成,并具有明显的过渡性特征。群落中木本植物占绝对优势,群落垂直空间分化明显,有乔木层、灌木层和草本层3个层次。群落物种多样性由高到低依次为灌木层、乔木层、草本层。群落中大叶榉占有明显的优势地位,马尾松(Pinus massoniana)、山槐(Albizia kalkora)、枫香(Liquidam bar form osana)为亚优势种。群落中大叶榉正处于旺盛生长期,自然更新良好,在未来的演替中,马尾松针叶树种将会逐渐减少,演替为稳定的落叶阔叶林结构。

Phytocoenological features of the Zelkova schneideriana community in Mountain Dashushan in the hill terrain between the Yangtze and Huaihe river

We studied the community characteristics of Zelkova schneideriana in Mountain Dashu in the hill terrain between the Yangtze and Huaihe river.The floristic composition,life-form,structure characteristics,age stucture of main tree species and succession tendency were analyzed.As for community composition,there are 49 species,45 genera and 28 families.The analysis of floristic geographical elements indicated that the flora was simple,tropiccal elements and temperate affinities are mainly part in the community,and with especially transitional character obvious tropical nature.The xylophyte dominated in the community,which was divided into three distinct layers: tree,shrub and herb layers.The species diversity of the community was shrub layer>tree layer>herb layer.The results showed that there was a striking dominance of Z.schneideriana in the community,Pinus massoniana,Albizia kalkora,Liquidambar formosana were the subspecies in the community.Z.schneideriana in the community was in the vigorous growing stage,in the natural succession,the number of Pinus massoniana will reduce gradually,and the community will finally succeed to an deciduous broad-leaf forest.