南京外秦淮河滨河绿地群落类型及功能特征分析

Analysis on plant community types and function characteristics in riparian zone along External Qinhuai River in Nanjing

应用植物群落学方法,对南京外秦淮河滨河绿地群落类型及功能特征进行的调查发现,南京外秦淮河滨河绿地共有木本植物46科57属84种(变种),其中裸子植物5科6属9种(变种),被子植物41科51属75种(变种)。依据主要木本植物种类及群落结构,将外秦淮河滨河绿地群落划分为6大类。分析认为,泥质河岸上构筑的植被群落不仅有利于河岸带生态功能的发挥,保存自然景观,而且植物种类丰富、多样性高、建造成本低廉,是一种值得推广的河岸带植被构建模式。6种群落相似性分析表明,东西长干巷及水西门以下河岸植被群落相似性较高(相似系数均大于0.30),有必要丰富植物种类提高物种多样性,提高植被生态功能和景观效应。

Community types and ecologic function characteristics in riparian zone along Qinhuai River in Nanjing were investigated. There were 84 species （varieties） of woody plants that,belong to 46 including families and 57 genera. Among these plants,five families including six genera and nine species are gymnosperms,and 41 families including 51 genera 75 species are angiosperms. According to main woody plants species and structure character,six communities were classified. Vegetation types constructed in clay riverside were not only advantageous to conserving riparian nature landscape,but also to exerting of ecologic function. Besides,plan species were rich,diversities indexes were high and the constructing cost was low there. So it was worthy of spreading the vegetation type. Comparability between East and west Changganxiang,among riversides of lower reaches after Shuiximen were high,plant component was few. Thus,it was needed to enrich plant species,increase species diversities,improve ecologic function and landscape effect of vegetation.