Microbial ecology
81
SCIE
[논문]Survey of Bacterial Phylogenetic Diversity During the Glacier Melting Season in an Arctic Fjord
Dukki Han, Seung-Il Nam
Tim Richter-Heitmann
Il-Nam Kim
Eunjung Choy
Ki-Tae Park
Tatsuya Unno
Jungman Kim (김정만)
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.
2020-10-16
2023-01-07
저작자표시-비영리
이 데이터의 저작권은 <연구자 기관/그룹/사용자>에게 있습니다.
김정만 ( 2023-01-07 ) [논문]Survey of Bacterial Phylogenetic Diversity During the Glacier Melting Season in an Arctic Fjord