Co-variance between free-living bacteria and Cochlodinium polykrikoides (Dinophyta) harmful algal blooms, South Korea SCIE SCOPUS

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Title
Co-variance between free-living bacteria and Cochlodinium polykrikoides (Dinophyta) harmful algal blooms, South Korea
Author(s)
Kim, Hyun Jung; Jeong, Ga Eul; Kim, Kang Eun; Park, Joon Sang; Kang, Don Hyug; Baek, Seung Ho; Lee, Chol Young; Kim, Han Soo; Cho, Sung Ho; Lee, Taek Kyun; Jung, Seung Won
KIOST Author(s)
Kim, Hyun Jung(김현정)Jeong, Ga Eul(정가을)Kim, Kang Eun(김강은)Park, Joon Sang(박준상)Kang, Don Hyug(강돈혁)Baek, Seung Ho(백승호)Lee, Chol Young(이철용)Kim, Han Soo(김한수)Cho, Sung Ho(조성호)Lee, Taek Kyun(이택견)Jung, Seung Won(정승원)
Alternative Author(s)
김현정; 정가을; 김강은; 박준상; 강돈혁; 백승호; 이철용; 김한수; 조성호; 이택견; 정승원
Publication Year
2023-02
Abstract
To understand the co-variance between common free-living bacteria and Cochlodinium polykrikoides harmful algal blooms (HABs) and their metabolic functions, we investigated 110 sampling sites in the Southern Sea of South Korea. These sampling sites were divided into three groups based on environmental factors and phytoplankton data with a similarity of 85% using non-metric multidimensional scaling. One group represented high-severity C. polykrikoides blooms, while the other two represented low-severity or no blooms. In high-severity HABs, inorganic phosphorous and dissolved organic carbon concentrations were strongly correlated with C. polykrikoides density (p < 0.01). This may reflect the changes in biochemical cycling due to inorganic and organic substrates released by HAB cells (or by cell destruction). Furthermore, 88 common bacterial operational taxonomic units (OTUs, with mean relative abundance > 1%) were identified. These included Gammaproteobacteria (36 OTUs), Flavobacteriia (24), Alphaproteobacteria (18), and other taxa (11). When C. polykrikoides blooms intensified, the relative abundances of Gammaproteobacteria also increased. OTU #030 (Flavicella sp., Flavobacteria, 96%) was positively correlated with C. polykrikoides abundance (r = 0.77, p < 0.001). Functional analysis based on the dominant bacterial OTUs revealed that chemoheterotrophy-related functions were more common in high-severity sites of HABs than in other groups. Therefore, the occurrence of HABs highlighted their interactions with bacteria and affected the bacterial community structure and metabolic functions. © 2022 Elsevier B.V.
ISSN
1568-9883
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/43864
DOI
10.1016/j.hal.2022.102371
Bibliographic Citation
Harmful Algae, v.122, 2023
Publisher
Elsevier BV
Keywords
16S rDNA metabarcoding; Bacterial diversity; Bacterial metabolic function; Cochlodinium polykrikoides; Free-living bacteria; Harmful algal blooms
Type
Article
Language
English
Document Type
Article
Publisher
Elsevier BV
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