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Distinct Microbial Communities in Adjacent Rock and Soil Substrates on a High Arctic Polar Desert

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Cited 1 time in scopus
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Title
Distinct Microbial Communities in Adjacent Rock and Soil Substrates on a High Arctic Polar Desert
Other Titles
고위도 북극의 인접한 암석 및 토양의 구별된 미생물 군집
Authors
Choe, Yong-Hoe
Kim, Mincheol
Lee, Yoo Kyung
Subject
Microbiology
Keywords
polar desert; lithic niche; edaphic niche; rock microbes; Arctic
Issue Date
2021-01
Citation
Choe, Yong-Hoe, Kim, Mincheol, Lee, Yoo Kyung. 2021. "Distinct Microbial Communities in Adjacent Rock and Soil Substrates on a High Arctic Polar Desert". FRONTIERS IN MICROBIOLOGY, 11(1): 1-15.
Abstract
Understanding microbial niche variability in polar regions can provide insights into the adaptive diversification of microbial lineages in extreme environments. Compositions of microbial communities in Arctic soils are well documented but a comprehensive multidomain diversity assessment of rocks remains insufficiently studied. In this study, we obtained two types of rocks (sandstone and limestone) and soils around the rocks in a high Arctic polar desert (Svalbard), and examined the compositions of archaeal, bacterial, fungal, and protistan communities in the rocks and soils. The microbial community structure differed significantly between rocks and soils across all microbial groups at higher taxonomic levels, indicating that Acidobacteria, Gemmatimonadetes, Latescibacteria, Rokubacteria, Leotiomycetes, Pezizomycetes, Mortierellomycetes, Sarcomonadea, and Spirotrichea were more abundant in soils, whereas Cyanobacteria, Deinococcus-Thermus, FBP, Lecanoromycetes, Eurotiomycetes, Trebouxiophyceae, and Ulvophyceae were more abundant in rocks. Interestingly, fungal communities differed markedly between two different rock types, which is likely to be ascribed to the predominance of distinct lichen-forming fungal taxa (Verrucariables in limestone, and Lecanorales in sandstone). This suggests that the physical or chemical properties of rocks could be a major determinant in the successful establishment of lichens in lithic environments. Furthermore, the biotic interactions among microorganisms based on co-occurrence network analysis revealed that Polyblastia and Verrucaria in limestone, and Atla, Porpidia, and Candelariella in sandstone play an important role as keystone taxa in the lithic communities. Our study shows that even in niches with the same climate regime and proximity to each other, heterogeneity of edaphic and lithic niches can affect microbial community assembly, which could be helpful in comprehensively understanding the effects of niche on microbial assembly in Arctic terrestrial ecosystems.
URI
https://repository.kopri.re.kr/handle/201206/11795
DOI
http://dx.doi.org/10.3389/fmicb.2020.607396
Appears in Collections  
2020-2020, Arctic permafrost environment change monitoring and prediction method developments (20-20) / Lee, Bang Yong (PN20081)
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