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Survey of Bacterial Phylogenetic Diversity During the Glacier Melting Season in an Arctic Fjord

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Title
Survey of Bacterial Phylogenetic Diversity During the Glacier Melting Season in an Arctic Fjord
Other Titles
북극 피오르드에서 빙하 융빙시즌동안 박테리아 계통발생다양성 연구
Authors
Han, Dukki
Richter-Heitmann, Tim
Kim, Il-Nam
Choy, Eun-Jung
Park, Ki-Tae
Unno, Tatsuya
Kim, Jungman
Nam, Seung-il
Subject
Environmental Sciences & Ecology; Marine & Freshwater Biology; Microbiology
Keywords
Arctic glacial fjord; Kongsfjorden; Bacterial biogeography; Stochastic-deterministic balance; SAR11; Phytoplankton-derived organicmatter
Issue Date
2021-04
Citation
Han, Dukki, et al. 2021. "Survey of Bacterial Phylogenetic Diversity During the Glacier Melting Season in an Arctic Fjord". MICROBIAL ECOLOGY, 81(1): 579-591.
Abstract
To understand bacterial biogeography in response to the hydrographic impact of climate change derived from the Arctic glacier melting, we surveyed bacterial diversity and community composition using bacterial 16S rRNA gene metabarcoding in the seawaters of Kongsfjorden, Svalbard during summer 2016. In the present study, bacterial biogeography in the Kongsfjorden seawaters showed distinct habitat patterns according to water mass classification and habitat transition between Atlantic and Fjord surface waters. Moreover, we estimated phylogenetic diversity of bacterial communities using the net relatedness, nearest taxon, and beta nearest taxon indices. We found the influence of freshwater input from glacier melting in shaping bacterial assemblage composition through the stochastic model. We further evaluated bacterial contributions to phytoplankton-derived dimethylsulfoniopropionate (DMSP) using a quantitative PCR (qPCR) measurement with demethylation (dmdA) and cleavage (dddP) genes of two fundamentally different processes. Our qPCR results imply that bacterial DMSP degradation follows the Atlantic inflow during summer in Kongsfjorden. These findings suggest that the Atlantic inflow and glacial melting influence bacterial community composition and assembly processes and thus affect the degradation of phytoplankton-derived organic matter in an Arctic fjord.
URI
https://repository.kopri.re.kr/handle/201206/11852
DOI
http://dx.doi.org/10.1007/s00248-020-01616-4
Appears in Collections  
2020-2020, Changes in environments and coastal geomorphology of Svalbard fjords, Arctic (20-20) / Nam, Seung-il (PN20090)
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