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Environ Res

Title:		Cyanobacteria blooms potentially enhance volatile organic compound (VOC) emissions from a eutrophic lake: Field and experimental evidence
Author(s):		Liu M; Wu T; Zhao X; Zan F; Yang G; Miao Y;
Address:		"School of Ecology and Environment, Anhui Normal University, Wuhu, 241000, China. School of Ecology and Environment, Anhui Normal University, Wuhu, 241000, China; Center of Cooperative Innovation for Recovery and Reconstruction of Degraded Ecosystem in Wanjiang City Belt, Wuhu, 241000, China. Electronic address: wuting19@mail.ahnu.edu.cn. School of Ecology and Environment, Anhui Normal University, Wuhu, 241000, China; Center of Cooperative Innovation for Recovery and Reconstruction of Degraded Ecosystem in Wanjiang City Belt, Wuhu, 241000, China. Electronic address: zanfengyu@126.com. School of Ecology and Environment, Anhui Normal University, Wuhu, 241000, China; Center of Cooperative Innovation for Recovery and Reconstruction of Degraded Ecosystem in Wanjiang City Belt, Wuhu, 241000, China"
Journal Title:		Environ Res
Year:		2021
Volume:		20210710
Issue:
Page Number:		111664 -
DOI:		10.1016/j.envres.2021.111664
ISSN/ISBN:		1096-0953 (Electronic) 0013-9351 (Linking)
Abstract:		"Eutrophication promotes massive cyanobacteria blooms (CBBs), leading to the release of volatile organic compounds (VOCs). To investigate the effects of cyanobacteria on VOC emissions, field campaigns were carried out in eutrophic Chaohu Lake at six sites with different microalgae densities during CBBs in summer 2019, and incubation experiments were performed in the laboratory. The results showed that the lake water was the primary source of VOCs at six sampling sites in Chaohu Lake during CBBs, with an average total VOC flux of 81.2 +/- 20.6 mug m(-2) h(-1). Alkanes were the most abundantly emitted VOCs, with a share of 23.1-63.7% of total emitted VOCs, followed by aromatics (16.6-46.3%). The fluxes of total VOCs were significantly greater at sites B and/or C than at site A in July, and at site B' and/or C' than at site A' in August in Chaohu Lake. The fluxes of total VOCs from living and decayed cyanobacteria in the experimental treatments were two orders of magnitude higher than the corresponding values in the control treatments in the laboratory incubation. Taken together, these results suggested that CBBs potentially enhanced VOC emissions from the eutrophic lake, and that cyanobacteria acted as an important source of VOCs. Additionally, non-methane hydrocarbons (i.e., alkanes, alkenes, and aromatics) predominated among the released VOCs during the stabilization and senescence stages, while oxygenated volatile organic compounds (i.e. alcohols, aldehydes, ketones, esters, and furans) prevailed during the apoptosis stage and aromatics and volatile organic sulfur compounds predominated during the decomposition stage, suggesting that VOC emissions varied markedly at different life stages"
Keywords:		*Air Pollutants/analysis China *Cyanobacteria Environmental Monitoring Eutrophication Hydrocarbons/analysis Lakes *Volatile Organic Compounds/analysis Cyanobacteria blooms (CBBs) Eutrophic lake Fluxes Life stages Volatile organic compounds (VOCs);
Notes:		"MedlineLiu, Mengdi Wu, Ting Zhao, Xiaoyu Zan, Fengyu Yang, Geng Miao, Yuqing eng Research Support, Non-U.S. Gov't Netherlands 2021/07/14 Environ Res. 2021 Nov; 202:111664. doi: 10.1016/j.envres.2021.111664. Epub 2021 Jul 10"