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首页> 美国卫生研究院文献>Microorganisms >Microbial Communities in Permafrost Soils of Larsemann Hills Eastern Antarctica: Environmental Controls and Effect of Human Impact
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Microbial Communities in Permafrost Soils of Larsemann Hills Eastern Antarctica: Environmental Controls and Effect of Human Impact

机译：南极洲大山庄山丘山丘的微生物群落：环境控制和人类影响的影响

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Although ice-free areas cover only about 0.1% of Antarctica and are characterized by harsh environmental conditions, these regions provide quite diverse conditions for the soil-forming process, having various physical and geochemical properties, and also assuring different conditions for living organisms. This study is aimed to determine existing soil microbial communities, their relationship with soil parameters and the influence of anthropogenic activity in Larsemann Hills, Eastern Antarctica. The soil microbiome was investigated at different locations using 16S rRNA gene pyrosequencing. The taxonomic analysis of the soil microbiomes revealed 12 predominant bacterial and archaeal phyla—Proteobacteria, Actinobacteria, Acidobacteria, Chloroflexi, Gemmatimonadetes, Verrucomicrobia, Planctomycetes, Bacteroidetes, Armatimonadetes, Firmicutes, Cyanobacteria, Thaumarchaeota. Some specific phyla have been also found in sub-surface horizons of soils investigated, thus providing additional evidence of the crucial role of gravel pavement in saving the favorable conditions for both soil and microbiome development. Moreover, our study also revealed that some bacterial species might be introduced into Antarctic soils by human activities. We also assessed the effect of different soil parameters on microbial community in the harsh environmental conditions of Eastern Antarctica. pH, carbon and nitrogen, as well as fine earth content, were revealed as the most accurate predictors of soil bacterial community composition.
机译：虽然自由冰区仅占南极洲的约0.1％，但这些区域的特征在于苛刻的环境条件，这些区域为土壤成型过程提供了相当多样的条件，具有各种物理和地球化学性质，并确保了生物体的不同条件。本研究旨在确定现有的土壤微生物社区，与土壤参数的关系以及南极洲大山脉山区的人为活动的关系。使用16S rRNA基因焦肌肉测序在不同位置研究了土壤微生物组。土壤微生物的分类学分析显示出12个主要的细菌和古代植物 - 植物 - 植物，抗菌剂，抗酸杆菌，氯昔粒菌，GemmatimonaDetes，VerrucoMicrobia，Planctomycetes，Blodoidetes，armatimona所有，骨骼，Cyanobacteria，ThaumarchaeoTa。一些特异性植物在调查的土壤的亚表面视野中也被发现，从而提供了砾石路面在节约土壤和微生物组发育的有利条件下的关键作用的额外证据。此外，我们的研究还透露，一些细菌种类可以通过人类活动引入南极土壤。我们还评估了不同土壤参数对南极洲苛刻环境条件的微生物群落的影响。作为土壤细菌群落组成的最准确的预测因子，PH，碳和氮，以及细土含量的含量。

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