Potential Cause of Decrease in Bloom Events of the Harmful Dinoflagellate Cochlodinium polykrikoidesin Southern Korean Coastal Waters in 2016 SCIE SCOPUS

Cited 3 time in WEB OF SCIENCE Cited 3 time in Scopus
Title
Potential Cause of Decrease in Bloom Events of the Harmful Dinoflagellate Cochlodinium polykrikoidesin Southern Korean Coastal Waters in 2016
Author(s)
Baek, Seung Ho; Kim, Yunji; Lee, Minji; Ahn, Chi-Yong; Cho, Kyung Hwa; Park, Bum Soo
KIOST Author(s)
Baek, Seung Ho(백승호)Kim, Yun Ji(김윤지)Lee, Min Ji(이민지)Park, Bum Soo(박범수)
Alternative Author(s)
백승호; 김윤지; 이민지; 박범수
Publication Year
2020-06
Abstract
Blooms of the ichthyotoxic dinoflagellateCochlodinium polykrikoidesare responsible for massive fish mortality events in Korean coastal waters (KCW). They have been consistently present in southern KCW over the last two decades, but they were not observed in 2016, unlike in the previous years. Despite extensive studies, the cause of this absence of this dinoflagellate bloom remains largely unknown. Thus, we compared physico-chemical and biological data from along the Tongyeong coast between 2016 and the previous four years (2012-2015). The averages of water temperature and salinity in August, 2016 were significantly (p< 0.001) different from those in the previous years. The amount of Changjiang River discharge, which can affect the environmental conditions in the southern Korean coastal area via ocean currents, was larger than in the previous years, resulting in a reduction in the salinity level in August when blooms ofC. polykrikoidesusually occurred. Moreover, compared to previous years, in 2016, there was a weak expansion ofC. polykrikoidesblooms in the Goheung-Oenarodo area whereC. polykrikoidesblooms were annually initiated in KCW. Lastly, the strong winds from the typhoon Lionrock may also have contributed to the early termination of this dinoflagellate bloom. Together with these findings, the combination of these environmental conditions in 2016, unlike in previous years, may have inhibited the formation ofC. polykrikoidesblooms along the Tongyeong coast.
ISSN
2072-6651
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/20976
DOI
10.3390/toxins12060390
Bibliographic Citation
TOXINS, v.12, no.6, 2020
Publisher
MDPI
Keywords
Cochlodinium polykrikoides; massive blooms; physico-chemical factors; Changjiang River discharge; Tongyeong coast (South Korea)
Type
Article
Language
English
Document Type
Article
Publisher
MDPI
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