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The Impact of Microclimate on the Reproductive Phenology of Female Populus tomentosa in a Micro-Scale Urban Green Space in Beijing

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  • Xiaoyi Xing

    (School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China
    Laboratory of Beijing Urban and Rural Ecological Environment, Beijing Forestry University, Beijing 100083, China
    National Engineering Research Center for Floriculture, Beijing Forestry University, Beijing 100083, China)

  • Li Dong

    (School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China
    Laboratory of Beijing Urban and Rural Ecological Environment, Beijing Forestry University, Beijing 100083, China
    National Engineering Research Center for Floriculture, Beijing Forestry University, Beijing 100083, China)

  • Cecil Konijnendijk

    (Department of Forest Resources Management, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada)

  • Peiyao Hao

    (School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China
    Laboratory of Beijing Urban and Rural Ecological Environment, Beijing Forestry University, Beijing 100083, China
    National Engineering Research Center for Floriculture, Beijing Forestry University, Beijing 100083, China)

  • Shuxin Fan

    (School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China
    Laboratory of Beijing Urban and Rural Ecological Environment, Beijing Forestry University, Beijing 100083, China
    National Engineering Research Center for Floriculture, Beijing Forestry University, Beijing 100083, China)

  • Wei Niu

    (School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China)

Abstract

The spatial variation of poplars’ reproductive phenology in Beijing’s urban area has aggravated the threat of poplar fluff (cotton-like flying seeds) to public health. This research explored the impact of microclimate conditions on the reproductive phenology of female Populus tomentosa in Taoranting Park, a micro-scale green space in Beijing (range <1 km). The observed phenophases covered flowering, fruiting, and seed dispersal, and ENVI-MET was applied to simulate the effect of the microclimate on SGS (start day of the growing season). The results showed that a significant spatial variation in poplar reproductive phenology existed at the research site. The variation was significantly affected by the microclimate factors DMT (daily mean temperature) and DMH (daily mean heat transfer coefficient), with air temperature playing a primary role. Specifically, the phenology of flowering and fruiting phenophases (BBB, BF, FF, FS) was negatively correlated with DMT (−0.983 ≤ r ≤ −0.908, p <0.01) and positively correlated with DMH (0.769 ≤ r ≤ 0.864, p < 0.05). In contrast, DSD (duration of seed dispersal) showed a positive correlation with DMT (r = 0.946, p < 0.01) and a negative correlation with DMH (r = −0.922, p < 0.01). Based on the findings, the increase in air convection with lower air temperature and decrease in microclimate variation in green space can be an effective way to shorten the seed-flying duration to tackle poplar fluff pollution in Beijing’s early spring.

Suggested Citation

  • Xiaoyi Xing & Li Dong & Cecil Konijnendijk & Peiyao Hao & Shuxin Fan & Wei Niu, 2021. "The Impact of Microclimate on the Reproductive Phenology of Female Populus tomentosa in a Micro-Scale Urban Green Space in Beijing," Sustainability, MDPI, vol. 13(6), pages 1-20, March.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:6:p:3518-:d:521874
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    References listed on IDEAS

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    1. Dario Ambrosini & Giorgio Galli & Biagio Mancini & Iole Nardi & Stefano Sfarra, 2014. "Evaluating Mitigation Effects of Urban Heat Islands in a Historical Small Center with the ENVI-Met ® Climate Model," Sustainability, MDPI, vol. 6(10), pages 1-17, October.
    2. Taleb, Dana & Abu-Hijleh, Bassam, 2013. "Urban heat islands: Potential effect of organic and structured urban configurations on temperature variations in Dubai, UAE," Renewable Energy, Elsevier, vol. 50(C), pages 747-762.
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