Urban greenspaces are public spaces, fulfilling multiple city functions, such as improvement of public health. They are also ecosystems which provide biodiversity as part of the green infrastructure. To evaluate greenspaces as ecosystems, seventeen urban greenspaces in Yokohama, Japan, were selected to conduct surveys of flora and construct a vegetation table. The present study investigated the number of woody plant species; their growth form (tree, shrub, or liana); the ratio of evergreen to deciduous plants; and whether plant species were native, exotic, wild, or planted. The greenspaces were compared with the control area, Enkaizan, a suburban greenspace within Yokohama and representative of Satoyama (a traditional landscape model with sustainable living space). The comparison used cluster analysis to match the correlation of identified species in each greenspace and split them into four groups: (1) natural, (2) quasi-natural, (3) quasi-artificial, and (4) artificial. The study found the natural greenspace group to have an intact hierarchical forest structure with trees, shrubs, and lianas; whereas artificial greenspaces missed either tree or shrub layers and had few lianas. The more artificial greenspaces had higher proportions of exotic and evergreen species.

城市绿地是公共空间，履行多种城市功能，例如改善公共卫生。它们也是作为绿色基础设施一部分提供生物多样性的生态系统。为了评估绿地作为生态系统，选择日本横滨的 17 个城市绿地进行植物群调查并构建植被表。本研究调查了木本植物种类的数量；它们的生长形式（树木、灌木或藤本植物）；常绿植物与落叶植物的比例；植物物种是本地的、外来的、野生的还是种植的。这些绿地与控制区 Enkaizan 进行了比较，Enkaizan 是横滨市郊的绿地，是 Satoyama 的代表（具有可持续生活空间的传统景观模型）。比较使用聚类分析来匹配每个绿地中已识别物种的相关性，并将它们分为四组：（1）自然、（2）准自然、（3）准人工和（4）人工。研究发现，自然绿地群具有完整的森林层次结构，有树木、灌木和藤本植物；而人工绿地则错过了树木或灌木层，并且几乎没有藤本植物。人工绿地越多，外来和常绿物种的比例就越高。