上海江湾城道路中央隔离带群落结构研究

Stratified Vegetation Community Structure of Urban Road Isolation Greenbelt in New Jiangwan City of Shanghai

上海市新江湾城道路中央隔离绿带是上海近年建设的植物种类最丰富、结构最复杂的隔离绿带之一,具有借鉴和推广价值。本研究选择新江湾城淞沪路中央隔离绿带的典型群落进行调查,分析了隔离绿带复层型植物群落结构和物种多样性特征,总结了群落中植物配置方式。研究表明:新江湾城中央隔离绿带植物种类丰富,调查的4个群落有维管束植物33科55属57种。整个绿带呈现草本层和灌木层物种丰富度高、乔木优势度大的多样性格局,不仅增加了群落稳定性及物种多样性,更提高了生态景观效果。此绿带主要以乡土植物为主,同时选择抗逆性强的外来种以适应中央隔离带的特殊生境。隔离绿带普遍采用乔-灌-草自然混交林式与模纹式相结合的配置结构,不仅丰富了生态景观,也提高了群落稳定性,降低养护成本。

The central isolation green belt in the New Jiangwan City is one of the areas which own the most abundant plant species in Shanghai.It adopted the most complicated structure of isolated greenbelt in the city these years with high reference value which is worthy of being popularized.Based on the classic community investigation of Shanghai New Jiangwan City Greenbelt of Songhu Road area,the paper mainly studies the diversity of species and community configuration in this area.During the research of these four communities,our study revealed the species richness by the data showing that 57 higher plant species belonging to 33 families and 55 genera were found.Higher species diversity was also found in these communities.The entire greenbelt presents the diversity pattern of herb layer and shrub layer species richness.High dominance of large arbors,not only enhanced community stability and enriched species diversity,but also improved the ecological landscapes effect.The native species were used more than others here,and the alien species with strong resistance were chosen to adapt to the central isolation belt of special habit to adapt to the special habitat of central isolation belts.The mixed-pattern of community configuration of herbs,shrubs and trees was used often used in these communities.It increased the community stability,lowered the maintenance costs,more importantly,it did better the cityscape for us and is really worthy of wide development and application.