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Picocyanobacterial cells in near-surface air above terrestrial and freshwater substrates in Greenland and Antarctica.
Environmental Microbiology Reports ( IF 3.3 ) Pub Date : 2020-03-16 , DOI: 10.1111/1758-2229.12832 Jessica V Trout-Haney 1 , Ruth C Heindel 2 , Ross A Virginia 3
Environmental Microbiology Reports ( IF 3.3 ) Pub Date : 2020-03-16 , DOI: 10.1111/1758-2229.12832 Jessica V Trout-Haney 1 , Ruth C Heindel 2 , Ross A Virginia 3
Affiliation
Bioaerosols are an important component of the total atmospheric aerosol load, with implications for human health, climate feedbacks and the distribution and dispersal of microbial taxa. Bioaerosols are sourced from marine, freshwater and terrestrial surfaces, with different mechanisms potentially responsible for releasing biological particles from these substrates. Little is known about the production of freshwater and terrestrial bioaerosols in polar regions. We used portable collection devices to test for the presence of picocyanobacterial aerosols above freshwater and soil substrates in the southwestern Greenland tundra and the McMurdo Dry Valleys of Antarctica. We show that picocyanobacterial cells are present in the near‐surface air at concentrations ranging from 2,431 to 28,355 cells m−3 of air, with no significant differences among substrates or between polar regions. Our concentrations are lower than those measured using the same methods in temperate ecosystems. We suggest that aerosolization is an important process linking terrestrial and aquatic ecosystems in these polar environments, and that future work is needed to explore aerosolization mechanisms and taxon‐specific aerosolization rates. Our study is a first step toward understanding the production of bioaerosols in extreme environments dominated by microbial life.
中文翻译:
格陵兰和南极洲陆地和淡水底物上方的近地表空气中的蓝藻细菌细胞。
生物气溶胶是大气总气溶胶负荷的重要组成部分,对人类健康,气候反馈以及微生物分类群的分布和扩散都有影响。生物气溶胶来自海洋,淡水和陆地表面,具有不同的机制可能导致这些基质释放生物颗粒。关于极地地区淡水和陆地生物气溶胶的生产知之甚少。我们使用便携式收集设备测试了格陵兰西南部苔原和南极麦克默多干旱谷在淡水和土壤基质之上是否存在微蓝藻气溶胶。我们表明,近表面空气中存在细微蓝细菌细胞,浓度范围为2 431至28 355个细胞m -3空气之间,基材之间或极性区域之间没有显着差异。我们的浓度低于在温带生态系统中使用相同方法测得的浓度。我们建议雾化是将这些极地环境中的陆地和水生生态系统联系起来的重要过程,因此有必要开展进一步的工作来探索雾化机制和特定分类群的雾化速率。我们的研究是了解在以微生物生命为主导的极端环境中生物气溶胶生产的第一步。
更新日期:2020-03-16
中文翻译:
格陵兰和南极洲陆地和淡水底物上方的近地表空气中的蓝藻细菌细胞。
生物气溶胶是大气总气溶胶负荷的重要组成部分,对人类健康,气候反馈以及微生物分类群的分布和扩散都有影响。生物气溶胶来自海洋,淡水和陆地表面,具有不同的机制可能导致这些基质释放生物颗粒。关于极地地区淡水和陆地生物气溶胶的生产知之甚少。我们使用便携式收集设备测试了格陵兰西南部苔原和南极麦克默多干旱谷在淡水和土壤基质之上是否存在微蓝藻气溶胶。我们表明,近表面空气中存在细微蓝细菌细胞,浓度范围为2 431至28 355个细胞m -3空气之间,基材之间或极性区域之间没有显着差异。我们的浓度低于在温带生态系统中使用相同方法测得的浓度。我们建议雾化是将这些极地环境中的陆地和水生生态系统联系起来的重要过程,因此有必要开展进一步的工作来探索雾化机制和特定分类群的雾化速率。我们的研究是了解在以微生物生命为主导的极端环境中生物气溶胶生产的第一步。