Journal of East China Normal University(Natural Science) ›› 2021, Vol. 2021 ›› Issue (2): 151-159.doi: 10.3969/j.issn.1000-5641.2021.02.015

• Ecological and Environmental Sciences • Previous Articles     Next Articles

Variation patterns and influencing factors of air anionsindifferent plant communities of an urban park

Wen SUN1,2(), Yujie HAN1,2, Shan YIN2,3,4,*()   

  1. 1. Shanghai Forest Station, Shanghai 200072, China
    2. Shanghai Urban Forest Ecosystem Research Station, State Administration of Forest and Grassland, Shanghai 200240, China
    3. School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
    4. Shanghai Yangtze River Delta Ecological and Environmental Change Research Station, Ministry of Education, Shanghai 200240, China
  • Received:2020-04-21 Online:2021-03-25 Published:2021-04-01
  • Contact: Shan YIN;


In this study, we evaluated the variation patterns of air anions in nine plant communities with different structures in Zhongshan Park of the central city of Shanghai; the air anion concentration was monitored continuously over the course of a year. In addition, we analyzed the influence of different factors—community structure, canopy density, and the level of surrounding water—on air anion concentration. The results showed that the air anion concentration within different community types was mostly between 200 cm3 and 700 cm3, and the daily variation showed a single peak. Air anion concentration remained at a high level but fluctuated significantly from July to October. The relationship between community structure and air anion concentration was roughly as follows: herbage > arbor with shrubs ≈ arbor with herbage > arbor with shrubs and herbage; in general, the more complex the community structure, the less the air anion variability. There was a negative correlation between the mean variation of the air anion concentration and the canopy density, implying that higher canopy density values were associated with lower mean variation of the air anion concentration throughout the community. This negative correlation became more significant in the daytime, between 7:00 to 19:00, when photosynthesis was ongoing. In addition, the impact of static water on the anion concentration was not found to be significant. The conclusion of this paper can provide basic data and a scientific basis for the construction of healthy plant communities in urban parks.

Key words: urban park, air anion, plant community, spatial variation

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