Katra Itzhak, Arotsker Luba, Krasnov Helena, Zaritsky Arieh, Kushmaro Ariel, Ben-Dov Eitan
Department of Geography and Environmental Development, Ben-Gurion University of the Negev, POB 653, Be'er-Sheva, 84104, Israel.
Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, POB 653, Be'er-Sheva, 84104, Israel.
Sci Rep. 2014 Jun 12;4:5265. doi: 10.1038/srep05265.
Dust storms include particulate matter that is transported over land and sea with biota that could impact downwind ecosystems. In addition to the physico-chemical compositions, organismal diversities of dust from two storm events in southern Israel, December 2012 (Ev12) and January 2013 (Ev13), were determined by pyro-sequencing using primers universal to 16S and 18S rRNA genes and compared. The bio-assemblages in the collected dust samples were affiliated with scores of different taxa. Distinct patterns of richness and diversity of the two events were influenced by the origins of the air masses: Ev13 was rich with reads affiliated to Betaproteobacteria and Embryophyta, consistent with a European origin. Ev12, originated in north-Africa, contained significantly more of the Actinobacteria and fungi, without conifers. The abundance of bacterial and eukaryotic reads demonstrates dissemination of biological material in dust that may impose health hazards of pathogens and allergens, and influence vegetation migration throughout the world.
沙尘暴包含随生物群在陆地和海洋上空传输的颗粒物，这些生物群可能会影响下风方向的生态系统。除了理化成分外，还通过焦磷酸测序法，使用针对16S和18S rRNA基因的通用引物，测定并比较了2012年12月（Ev12）和2013年1月（Ev13）发生在以色列南部的两次沙尘暴事件中沙尘的生物多样性。收集的沙尘样本中的生物群落与众多不同的分类单元相关。这两次事件中丰富度和多样性的不同模式受到气团来源的影响：Ev13富含与β-变形菌门和有胚植物相关的序列，这与气团源自欧洲一致。起源于北非的Ev12含有明显更多的放线菌和真菌，且没有针叶树。细菌和真核生物序列的丰度表明沙尘中生物物质的传播，这可能会带来病原体和过敏原的健康危害，并影响全球的植被迁移。
