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Bacterial Communities of Surface Mixed Layer in the Pacific Sector of the Western Arctic Ocean during Sea-Ice Melting

Cited 14 time in scopus
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Title
Bacterial Communities of Surface Mixed Layer in the Pacific Sector of the Western Arctic Ocean during Sea-Ice Melting
Other Titles
북극해 표층수 박테리아 군집구조
Authors
Lee, Yoo Kyung
Han, Dukki
Kang, Ilnam
Ha, Ho Kyung
Kim, Hyun-cheol
Kim, Ok-Sun
Lee, Bang Yong
Cho, Jang-Cheon
Hur, Hor-Gil
Subject
Science & Technology - Other Topics
Keywords
Arctic Ocean; Ice core; bacterial community
Issue Date
2014
Citation
Lee, Yoo Kyung, et al. 2014. "Bacterial Communities of Surface Mixed Layer in the Pacific Sector of the Western Arctic Ocean during Sea-Ice Melting". PLOS ONE, 9(1): 86887-86887.
Abstract
From July to August 2010, the IBRV ARAON journeyed to the Pacific sector of the Arctic Ocean to monitor bacterial variation in Arctic summer surface-waters, and temperature, salinity, fluorescence, and nutrient concentrations were determined during the ice-melting season. Among the measured physicochemical parameters, we observed a strong negative correlation between temperature and salinity, and consequently hypothesized that the melting ice decreased water salinity. The bacterial community compositions of 15 samples, includicng seawater, sea-ice, and melting pond water, were determined using a pyrosequencing approach and were categorized into three habitats: (1) surface seawater, (2) ice core, and (3) melting pond. Analysis of these samples indicated the presence of local bacterial communities;a deduction that was further corroborated by the discovery of seawater- and ice-specific bacterial phylotypes. In all samples, the Alphaproteobacteria, Flavobacteria, and Gammaproteobacteria taxa composed the majority of the bacterial communities. Among these, Alphaproteobacteria was the most abundant and present in all samples, and its variation differed among the habitats studied. Linear regression analysis suggested that changes in salinity could affect the relative proportion of Alphaproteobacteria in the surface water. In addition, the species-sorting model was applied to evaluate the population dynamics and environmental heterogeneity in the bacterial communities of surface mixed layer in the Arctic Ocean during sea-ice melting.
URI
http://repository.kopri.re.kr/handle/201206/6713
DOI
http://dx.doi.org/10.1371/journal.pone.0086887
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