Aeolian dispersal of bacteria in southwest Greenland: their sources, abundance, diversity and physiological states
Aeolian dispersal of bacteria in southwest Greenland: their sources, abundance, diversity and physiological states
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格陵兰岛西南部细菌的风沙传播：来源、丰度、多样性和生理状态
DOI：
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发表时间：
2018
影响因子：
4.2
通讯作者：
K. Finster
中科院分区：
文献类型：
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作者：
Tina Šantl;U. Gosewinkel;Piotr Starnawski;M. Lever;K. Finster
北极正在经历剧烈的气候变化，导致其陆地生态系统的深刻变化，从而导致栖息在其中的微生物群落的变化。这些群落的聚集受到风成沉积的影响。然而，人们对北极空气中微生物的丰度、多样性、来源和活动知之甚少。我们研究了格陵兰岛西南部大气中的细菌，发现细菌群落的多样性与气温呈正相关，与相对湿度呈负相关。该群落由1.3×103±1.0×103细胞m−3组成，这些细胞由当地陆地环境雾化或从海洋、冰川和陆地表面长途运输而来。平均而言，空气中的细菌细胞表现出较高的活性电位，反映在高16S rRNA拷贝数（590±300 rRNA细胞−1）上，这与水蒸气压呈正相关。我们观察到不同的细菌分支在它们的活性电位上是不同的。例如，红杆菌科和梭菌门具有较高的活性电位，而变形菌门具有较低的活性电位。在那些含有冰核活性物种的细菌科中，具有高活性潜力的细胞在空气中很少见，但在雨中却很丰富。众所周知，冰核活性物种有助于冻结，因此可能参与云和雨的形成。数字。没有可用的标题。
Abstract The Arctic is undergoing dramatic climatic changes that cause profound transformations in its terrestrial ecosystems and consequently in the microbial communities that inhabit them. The assembly of these communities is affected by aeolian deposition. However, the abundance, diversity, sources and activity of airborne microorganisms in the Arctic are poorly understood. We studied bacteria in the atmosphere over southwest Greenland and found that the diversity of bacterial communities correlated positively with air temperature and negatively with relative humidity. The communities consisted of 1.3×103 ± 1.0×103 cells m−3, which were aerosolized from local terrestrial environments or transported from marine, glaciated and terrestrial surfaces over long distances. On average, airborne bacterial cells displayed a high activity potential, reflected in the high 16S rRNA copy number (590 ± 300 rRNA cell−1), that correlated positively with water vapor pressure. We observed that bacterial clades differed in their activity potential. For instance, a high activity potential was seen for Rubrobacteridae and Clostridiales, while a low activity potential was observed for Proteobacteria. Of those bacterial families that harbor ice‐nucleation active species, which are known to facilitate freezing and may thus be involved in cloud and rain formation, cells with a high activity potential were rare in air, but were enriched in rain. Figure. No Caption available.
影响因子：
6.3
作者：
Attard, E.;Yang, H.;Morris, C. E.
通讯作者：
Morris, C. E.