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Variations in bacterial and archaeal communities along depth profiles of Alaskan soil cores

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Title
Variations in bacterial and archaeal communities along depth profiles of Alaskan soil cores
Other Titles
알래스카 동토 코어들 간에 깊이 별 세균 및 고세균 군집 변화분석
Authors
Binu, M.
Lee, Yoo Kyung
Ahn, Jinho
Yang, Ji-Woong
Byun, Eunji
Kim, Yongwon
Kim, Mincheol
Subject
Science & Technology - Other Topics
Keywords
미생물; 알래스카; 영구동토층
Issue Date
2018
Citation
Binu, M., et al. 2018. "Variations in bacterial and archaeal communities along depth profiles of Alaskan soil cores". SCIENTIFIC REPORTS, 8(1): 504-NaN.
Abstract
Understating the microbial communities and ecological processes that influence their structure in permafrost soils is crucial for predicting the consequences of climate change. In this study we investigated the bacterial and archaeal communities along depth profiles of four soil cores collected across Alaska. The bacterial and archaeal diversity (amplicon sequencing) overall decreased along the soil depth but the depth-wise pattern of their abundances (qPCR) varied by sites. The community structure of bacteria and archaea displayed site-specific pattern, with a greater role of soil geochemical characteristics rather than soil depth. In particular, we found significant positive correlations between methane trapped in cores and relative abundance of methanogenic archaeal genera, indicating a strong association between microbial activity and methane production in subsurface soils. We observed that bacterial phylogenetic community assembly tended to be more clustered in surface soils than in deeper soils. Analyses of phylogenetic community turnover among depth profiles across cores indicated that the relative influence of deterministic and stochastic processes was mainly determined by soil properties rather than depth. Overall, our findings emphasize that the vertical distributions of bacterial and archaeal communities in permafrost soils are to a large extent determined by the variation in sitespecific soil properties.
URI
http://repository.kopri.re.kr/handle/201206/6358
DOI
http://dx.doi.org/10.1038/s41598-017-18777-x
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