生物多样性 ›› 2024, Vol. 32 ›› Issue (2): 23364.  DOI: 10.17520/biods.2023364

• 研究报告: 植物多样性 • 上一篇    下一篇

上海城市公园苔藓植物多样性分布格局及其环境影响因子

吴相獐1,雷富民1,单壹壹1,于晶1,2*   

  1. 1. 上海师范大学生命科学学院,上海 200234;
    2. 上海长三角城市湿地生态系统国家野外科学观测研究站,上海 200234
  • 收稿日期:2023-09-26 修回日期:2023-12-15 出版日期:2024-02-20 发布日期:2024-01-24
  • 通讯作者: 于晶

Distribution pattern of bryophyte diversity and environmental impact factors in urban parks of Shanghai

Xiangzhang Wu1, Fumin Lei1, Yiyi Shan1, Jing Yu1,2*   

  1. 1 College of Life Sciences, Shanghai Normal University, Shanghai 200234
    2 Yangtze River Delta Urban Wetland Ecosystem National Field Scientific Observation and Research Station, Shanghai 200234
  • Received:2023-09-26 Revised:2023-12-15 Online:2024-02-20 Published:2024-01-24
  • Contact: Jing Yu

摘要:

城市公园的生物多样性十分丰富, 在生物多样性保护方面具有重要价值。苔藓植物是公园生物多样性的重要组成成分, 但因其体型小、难以鉴定等, 容易被人们所忽略, 因此对其多样性的研究和保护也相对薄弱。本文基于文献资料和生态调查数据, 整合上海市中心城区和郊区共35个样点的苔藓植物名录, 应用聚类分析对公园进行分组, 比较了市区和郊区两个区域的苔藓植物相似性; 采用典范对应分析(CCA)及层次分割的方法, 定量研究环境因子与城市公园苔藓植物多样性分布格局的关系。结果表明, 35个公园共有苔藓植物34科74属164种, 包括苔类7科8属9种、藓类27科66属155种, 其中有12种中国特有种和4种近危种。根据聚类分析结果, 35个公园可划分为两组, 主要与人口密度、与市中心距离、与主干道距离及公园面积等因素有关。市区和郊区两个区域的科、属、种的Jaccard相似性系数分别为0.94、0.89和0.30, 表明两个区域的物种组成各有特点。层次分割结果显示, 环境因子对城市公园苔藓植物多样性分布格局的解释率从高到低分别为人口密度、公园年龄、与市中心距离、与主干道距离、森林覆盖率、湖泊覆盖率及公园面积。整体上, 上海城市公园苔藓植物物种多样性较高, 而且市区公园和郊区公园物种组成存在一定差异, 两个区域对于苔藓植物多样性保护都具有重要价值。本研究揭示了人口密度、与主干道距离和森林覆盖率等不同环境因子对城市公园苔藓植物多样性分布格局的影响, 有助于对城市苔藓植物多样性的全面认识, 促进城市生态系统及苔藓植物多样性的保护。

关键词: 苔藓植物, 生物多样性, 城市公园, 聚类分析, 典范对应分析

Abstract


Aims: Urban parks are very rich in biodiversity and play an important role in conservation. Bryophytes are an important component of this biodiversity, but due to their small size and the challenges associated with their identification, they tend to be overlooked. Research on these nonvascular plants is therefore comparatively lacking. We aim to strengthen the comprehensive understanding of urban biodiversity by including robust information on bryophytes and promote urban conservation.  

Methods: Based on the literature data and ecological survey data, we integrated the list of bryophytes from 35 sample points in central urban areas and suburb areas of Shanghai. We applied cluster analysis to group the parks and compared the similarity of bryophytes in urban and suburban areas. Canonical correspondence analysis (CCA) and hierarchical partitioning methods were used to quantitatively study the relationship between environmental factors and the distribution of bryophyte species diversity.

Results: The results showed that 164 species of bryophytes belonging to 74 genera in 34 families lived in 35 parks. This grouping included 9 species belonging to 8 genera in 7 families of liverworts and 155 species belonging to 66 genera in 27 families of mosses. Twelve of these species are endemic to China and four species are considered Near Threatened. According to the results of cluster analysis, these 35 parks can be divided into two groups, distinguished by population density, distance to the city center, distance to the primary highway, and park area. The Jaccard similarity coefficients of families, genera and species in urban and suburban areas were 0.94, 0.89, and 0.30, respectively, indicating that the species composition of the two areas had their own characteristics. The hierarchical partitioning method showed that the environmental factors that explained the distribution pattern of bryophyte diversity in urban parks were, from high to low, DOP (population density), AGI (age of the park), DIS2 (distance to the city center), DIS1 (distance to the primary highway), LPT (proportion of lake area to park area), FPT (proportion of forest area to park area), and AREA (park area).

Conclusion: On the whole, the species diversity of bryophytes in Shanghai’s urban parks is rich and there are some differences in the species composition between urban parks and suburban parks. Both regions play an important role in the conservation of bryophyte diversity. We revealed the effects of different environmental factors such as DOP, DIS1 and FPT on the distribution pattern of bryophyte diversity in urban parks, in order to strengthen the comprehensive understanding of urban bryophyte diversity and promote the protection of urban ecosystems and bryophyte diversity.


Key words: bryophytes, biodiversity, city park, cluster analysis, canonical correspondence analysis