Variations in Sap Flux Density of Three Urban Tree Species and Their Main Environmental Influencing Factors in Different Timescales in the Beijing Metropolitan Area
文献类型：期刊论文
| 作者 | Chen, Yuanyuan; Wang, Xiaoke ; Zhang, Hongxing; Sun, Xu
|
| 刊名 | FORESTS
 |
| 出版日期 | 2022 |
| 卷号 | 13期号:10页码:1646-1-17 |
| 关键词 | Cedrus deodara environmental factors different timescales Pinus tabulaeformis Robinia pseudoacacia sap flux density urban area |
| 英文摘要 | Despite the importance of landscape design and water-resources management for urban planning, urban-forest transpiration was seldom estimated in situ. Detailed data on different urban trees' water resource use and the effect of climatic fluctuations on their transpiration behaviour in different timescales are limited. In this study, we used a thermal dissipation method to measure the sap flux density (J(s)) of three urban tree species (Pinus tabulaeformis Carriere, Cedrus deodara (Roxb.) G. Don, and Robinia pseudoacacia Linn.) from 1 May 2008 to 30 April 2016 in Beijing Teaching Botanical Garden. The effects of environmental factors on sap flux density (J(s)) in different timescales were also analyzed. The results showed that there were significant differences in the sap flux density of three trees species in daily, seasonal, and interannual timescales. The hourly, seasonal, and interannual mean sap flux density of Pinus tabulaeformis were higher than that of Cedrus deodara and Robinia pseudoacacia. The seasonal mean J(s) of Pinus tabulaeformis, Cedrus deodara, and Robinia pseudoacacia in summer were 18.67, 16.19, and 41.62 times that in winter over 2008-2015. The annual mean sap flux density of Pinus tabulaeformis was 1.25-1.72 and 1.26-1.82 times that Cedrus deodara and Robinia pseudoacacia over 2008-2015. The J(s) responses in three tree species to environmental factors varied differently from daily to interannual timescales. The pattern of day-to-day variation in J(s) of three urban tree species corresponded closely to air temperature (T-a), soil temperature (T-s), solar radiation (R-s), and vapor pressure deficit (VPD). The Jarvis-Stewart model based on T-a, R-s, and VPD was more suitable for the sap flux density simulation of Pinus tabulaeformis than Cedrus deodara and Robinia pseudoacacia. The main factor affecting the sap flux density of Pinus tabulaeformis and Cedrus deodara was T-a in seasonal timescales. However, the main factor affecting the sap flux density of Robinia pseudoacacia was T-s. The interannual variations in the J(s) of Pinus tabulaeformis and Robinia pseudoacacia were mainly influenced by wind speed (w) and soil water content (SWC), respectively. The selected environmental factors could not explain the variation in the sap flux density of Cedrus deodara in an interannual timescale. The findings of the present study could provide theoretical support for predicting the water consumption of plant transpiration under the background of climate change in the future. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/48441]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 作者单位 | 1.Chinese Academy of Sciences 2.University of Chinese Academy of Sciences, CAS 3.Research Center for Eco-Environmental Sciences (RCEES) 4.Wuhan Botanical Garden, CAS |
| 推荐引用方式 GB/T 7714 | Chen, Yuanyuan,Wang, Xiaoke,Zhang, Hongxing,et al. Variations in Sap Flux Density of Three Urban Tree Species and Their Main Environmental Influencing Factors in Different Timescales in the Beijing Metropolitan Area[J]. FORESTS,2022,13(10):1646-1-17. |
| APA | Chen, Yuanyuan,Wang, Xiaoke,Zhang, Hongxing,&Sun, Xu.(2022).Variations in Sap Flux Density of Three Urban Tree Species and Their Main Environmental Influencing Factors in Different Timescales in the Beijing Metropolitan Area.FORESTS,13(10),1646-1-17. |
| MLA | Chen, Yuanyuan,et al."Variations in Sap Flux Density of Three Urban Tree Species and Their Main Environmental Influencing Factors in Different Timescales in the Beijing Metropolitan Area".FORESTS 13.10(2022):1646-1-17. |
入库方式： OAI收割
来源：生态环境研究中心
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