Characteristics and Influencing Factors of the Microbial Concentration and Activity in Atmospheric Aerosols over the South China Sea
Characteristics and Influencing Factors of the Microbial Concentration and Activity in Atmospheric Aerosols over the South China Sea
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南海大气气溶胶微生物浓度和活性特征及影响因素
DOI：
10.1007/s11802-021-4549-y
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发表时间：
2021-03
影响因子：
1.6
通讯作者：
Li Hongtao
中科院分区：
文献类型：
--
作者：
Qi Jianhua;Yin Yidan;Xie Jiamin;Li Mengzhe;Ding Xue;Li Hongtao
海洋是大气气溶胶中微生物的重要来源；然而，关于海洋上空气中微生物的特征及其影响因素的信息很少。本文报道了2016年5-6月在南海中国海面采集的气溶胶中微生物丰度和活性的特征。南海气溶胶中微生物浓度范围为1.68×10~5~4.84×10~5个−~3，与青岛沿海样品相比，平均下降40%~54%。大约63%-76%的空气微生物存在于粗颗粒(>；2.1微米)中，其大小在SCS上的分布是可变的。二乙酸荧光素水解法测定的气溶胶微生物活性范围为2.0 9~11.97 ng m−3h−1钠荧光素(SF)，比沿海地区低15%~79%。这些值反映了SCS上与微生物浓度不同的空间分布。除某些样品外，所有样品中68%的微生物活性发生在粗颗粒中。相关分析表明，微生物丰度和活性与气溶胶、有机碳(OC)和水溶性有机碳(WSOC)浓度呈正相关，表明大气微生物可能与大气中某些水溶性有机物的反应有关。此外，空气微生物浓度与水平离岸距离呈显著负相关。微生物浓度和活性与风速呈显著正相关。
Oceans are important sources of microbes in atmospheric aerosols; however, information about the characteristics of airborne microbes and their influencing factors over oceans is lacking. Here we report the characteristics of the microbial abundance and activity in aerosols sampled near the sea surface over the South China Sea (SCS) from May to June 2016. The airborne microbial concentration range in the aerosols was 1.68×105to 4.84×105cells m−3over the SCS, reflecting an average decrease of 40%–54% over the SCS compared with that in the samples from the coastal region of Qingdao. About 63%–76% of the airborne microbes occurred in coarse particles (> 2.1 µm), with a variable size distribution over the SCS. The microbial activity range in aerosols, measured by the fluorescein diacetate (FDA) hydrolysis method, was 2.09–11.97 ng m−3h−1sodium fluorescein (SF) over the SCS, which was 15%–79% lower than that over the coastal region. These values reflected a different spatial distribution over the SCS from that of the microbial concentration. Except for certain samples, all samples had 68% of the microbial activity occurring in coarse particles. Correlation analysis showed that the microbial abundance and activity were positively correlated with the aerosol, organic carbon (OC), and water-soluble organic carbon (WSOC) concentrations, indicating that the airborne microbes may be related to the reactions of certain water-soluble organic chemicals in the atmosphere. Moreover, the concentrations of airborne microbes were significantly negatively correlated with the horizontal offshore distance. The microbial concentration and activity were significantly correlated with wind speed.
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影响因子：
5
作者：
Yi-Hua Wu;Chang-Chuan Chan;C. Rao;Chung-te Lee;H. Hsu;Y. Chiu;H. Chao
通讯作者：
Yi-Hua Wu;Chang-Chuan Chan;C. Rao;Chung-te Lee;H. Hsu;Y. Chiu;H. Chao
影响因子：
4.5
作者：
Aller, JY;Kuznetsova, MR;Kemp, PF
通讯作者：
Kemp, PF
影响因子：
6.3
作者：
Amato, P.;Demeer, F.;Delort, A.-M.
通讯作者：
Delort, A.-M.
DOI：
10.5860/choice.32-3295
发表时间：
1994
期刊：
--
影响因子：
--
作者：
B. Lighthart;J. Mohr.A.
通讯作者：
B. Lighthart;J. Mohr.A.
影响因子：
6.5
作者：
Cui, Junfang;Holden, Nicholas M.
通讯作者：
Holden, Nicholas M.