박범수
2017-06-22T00:29:12Z
2017-06-22T00:29:12Z
2015-09
HARMFUL ALGAE, v. 48, Page. 44-54
1568-9883
1878-1470
http://www.sciencedirect.com/science/article/pii/S1568988315001134
http://hdl.handle.net/20.500.11754/27796
Recent studies of dinoflagellates have reported that blooms can be closely related to the characteristics of the associated bacteria, but studies of the correlation between the toxic dinoflagellate, Cochlodinium polykrikoides and their associated bacterial community composition has not been explored. To understand this correlation, changes in bacterial community structure through the evolution of a C. polykrikoides bloom in Korean coastal waters via clone library analysis were investigated. Although there were no apparent changes in physio-chemical factors during the onset of the C polykrikoides bloom, the abundance of bacteria bourgeoned in parallel with C polykrikoides densities. Alpha-, gamma-proteobacteria and Flavobacteria were found to be dominant phyletic groups during C. polykrikoides blooms. The proportion of gamma-proteobacteria was lower (11.8%) during peak of the bloom period compared to the post-bloom period (26.2%). In contrast, alpha-proteobacteria increased in dominance during blooms. Among the alpha-proteobacteria, members of Rhodobacterales abruptly increased from 38% of the alpha-proteobacteria before the bloom to 74% and 56% during the early bloom and peak bloom stages, respectively. Moreover, multiple sites concurrently hosting C polykrikoides blooms also contained high portions of Rhodobacterales and principal component analysis (PCA) demonstrated that Rhodobacterales had a positive, significant correlation with C. polykrikoides abundances (p ˂ 0.01, Pearson correlation coefficients). Collectively, this study reveals the specific clades of bacteria that increase (Rhodobacterales) and decrease (gamma-proteobacteria) in abundance C polykrikoides during blooms. (C) 2015 Elsevier B.V. All rights reserved.
We thank Moonho Son (KIOST) for assistance with nutrients analysis, Pengbin Wang for providing comments and Zhun Li for assistance with statistical analysis. This work (2015R1A2A2A01008115) was supported by Mid-career Researcher Program through NRF (National Research Foundation), grant funded by the MEST (Ministry of Education, Science and Technology).
en
ELSEVIER SCIENCE BV
Cochlodinium polykrikoides bloom
Bacterial community
Correlation
Rhodobacterales
Dynamics of bacterial community structure during blooms of Cochlodinium polykrikoides (Gymnodiniales, Dinophyceae) in Korean coastal waters
Article
48
10.1016/j.hal.2015.07.004
44-54
HARMFUL ALGAE
Park, Bum Soo
Kim, Joo-Hwan
Kim, Jin Ho
Gobler, Christopher J.
Baek, Seung Ho
Han, Myung-Soo
2015012384
S
RESEARCH INSTITUTE[S]
THE RESEARCH INSTITUTE FOR NATURAL SCIENCES
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