Enhancing plant diversity and mitigating BVOC emissions of urban green spaces through the introduction of ornamental tree species

《Enhancing plant diversity and mitigating BVOC emissions of urban green spaces through the introduction of ornamental tree species》

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关键字: Ecosystem services; Isoprene; Ozone; Urban greening; Urban planning; VOLATILE ORGANIC-COMPOUNDS; COMPOUND EMISSIONS; BIOGENIC EMISSIONS; ISOPRENE EMISSION; AIR-QUALITY; ECOSYSTEM SERVICES; ATMOSPHERIC CO2; RURAL COMPLEX; CHINA; FOREST

作者单位: [Ren, Yuan; Ge, Ying; Pan, Kaixuan; Qu, Zelong; Han, Wenjuan; Chang, Jie] Zhejiang Univ, Coll Life Sci, Hangzhou 310058, Zhejiang, Peoples R China. [Ma, Danping] Zhejiang Univ Water Resources & Elect Power, Engn Expt Training Ctr, Hangzhou 310018, Zhejiang, Peoples R China. [Song, Xilu] Shandong Univ Sci & Technol, Capital Construct Dept, Qingdao 266590, Peoples R China. [Shi, Yan] Zhejiang A&F Univ, Sch Landscape Architecture, Linan 311300, Peoples R China. [Guo, Peipei] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China. Chang, J (reprint author), Zhejiang Univ, Dept Biol Sci, Coll Life Sci, 866 Yuhangtang Rd, Hangzhou 310058, Zhejiang, Peoples R China. E-Mail: jchang@zju.edu.cn

摘要: Promoting the plant diversity of urban green spaces is crucial to increase ecosystem services in urban areas. While introducing ornamental plants can enhance the biodiversity of green spaces it risks environmental impacts such as increasing emissions of biogenic volatile organic compounds (BVOCs) that are harmful to air quality and human health. The present study, taking Qingdao City as a case study, evaluated the plant diversity and BVOC emissions of urban green spaces and tried to find out a solution to increase biodiversity while reducing BVOC emissions. Results showed that: (1) the species diversity and phylogenetic diversity of trees in urban green spaces were 22% and 16% lower than rural forest of this region; (2) urban areas had higher BVOC emission intensity (2.6 g C m(-2) yr(-1)) than their rural surroundings (2.1 g C m(-2) yr(-1)); (3) introducing the selected 11 tree species will increase 15% and 11% of species diversity and phylogenetic diversity, respectively; and (4) the BVOC emissions from green spaces will more than triple by 2050, but a moderate introduction of the selected low-emitting trees species could reduce 34% of these emissions. The scheme of introducing low-emitting ornamental species leads to a win-win situation and also has implications for the sustainable green space management of other cities.