Study on the Community Structural Characteristics of the Environmental Protection Plant Zone in Shanghai Botanical Garden

上海植物园的环保植物区，是整个园区中不以专类植物为主体的区域，种植的植物种类以及配置方式接近城市绿地。为明确环保植物区树木生长情况与群落结构特征，以及和城市绿地群落结构的差异，本研究对环保植物区进行每木调查，主要结论包括：1) 环保植物区以常绿阔叶林、常绿落叶阔叶混交林为主，出现频率分别为55.56%和27.78%；2) 共记录植物47科74属96种，单位面积物种丰富度高于上海城市绿地，与上海自然林地相当；3) 植物群落均为乔 + 灌 + 草类型的复层群落，其中77.8%的群落为双层乔 + 灌 + 草模式，远高于城市绿地的平均水平。The Environmental Protection Plant Zone of the Shanghai Botanical Garden, distinct from specialized plant collections, showcases vegetation composition and configuration patterns similar to those found in urban green spaces. To elucidate tree growth status, community structural characteristics, and differences from typical urban green space communities, we conducted a comprehensive tree census within this zone. Key findings include: 1) Vegetation types: 55.56% are evergreen broad-leaved forest, and 27.78% are mixed evergreen-deciduous broad-leaved forest; 2) Floristic composition: A total of 96 species (excluding ruderal species) from 74 genera and 47 families were recorded. The Environmental Protection Plant Zone demonstrated biodiversity metrics comparable to those of natural forests in Shanghai, surpassing those of other urban green space types; 3) All communities displayed multi-layered structures (tree-shrub-herb), with 77.8% featuring dual-tree-layer configurations, significantly exceeding the average level observed in urban green spaces.