Intraspecific bloom succession in the harmful dinoflagellate Cochlodinium polykrikoides (Dinophyceae) extended the blooming period in Korean coastal waters in 2009 SCIE SCOPUS

Cited 19 time in WEB OF SCIENCE Cited 25 time in Scopus
Title
Intraspecific bloom succession in the harmful dinoflagellate Cochlodinium polykrikoides (Dinophyceae) extended the blooming period in Korean coastal waters in 2009
Author(s)
Park, Bum Soo; Kim, Jin Ho; Kim, Joo-Hwan; Baek, Seung Ho; Han, Myung-Soo
KIOST Author(s)
Baek, Seung Ho(백승호)
Alternative Author(s)
백승호
Publication Year
2018-01
Abstract
Although there have been extensive studies on dinoflagellate blooms in recent decades, the mechanism that allows the maintenance of blooms over long periods remains uncertain, and studies on genetically differentiated subpopulations may provide insights into this mechanism, In this study, the influence of two genetically distinct subpopulations of the dinoflagellate Cochlodinium polykrikoides, referred to as Group I and IV, on bloom duration in Korean coastal waters (KCW) was examined using a quantitative PCR (qPCR) assay. In this study, a C polykrikoides bloom occurred over a longer period in 2009 (49 days), whereas the bloom period was shorter in 2010 (35 days). The qPCR results indicate that intraspecific bloom succession between Groups I and IV occurred in 2009, whereas only a single subpopulation (Group I) was responsible for the bloom in 2010. Based on the statistical analysis, the Group I and Group IV blooms occurred under significantly different environmental conditions (p <= 0.05) in terms of water temperature, pH, and phosphate concentration, and these subpopulations exhibited significantly different relationships with environmental factors, particularly water temperature (p < 0.01). This variability may allow blooms to continue through intraspecific bloom succession even after environmental conditions change. Southern KCW are affected by outer regions via the Tsushima Warm Current (TWC) every summer. Group IV (<= 1108 +/- 1 69 cells L-1) was primarily observed along the route of the TWC in summer 2009, when the bloom of this subpopulation occurred in southern KCW. These results suggest that Group IV transported via the TWC may have influenced the bloom dynamics of this subpopulation in summer 2009. (C) 2017 Elsevier B.V. All rights reserved.
ISSN
1568-9883
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1041
DOI
10.1016/j.hal.2017.12.004
Bibliographic Citation
HARMFUL ALGAE, v.71, pp.78 - 88, 2018
Publisher
ELSEVIER SCIENCE BV
Subject
DIATOM DITYLUM-BRIGHTWELLII; TIME PCR ASSAYS; PHYLOGENETIC-RELATIONSHIPS; MULTIVARIATE ANALYSES; MARGALEF DINOPHYCEAE; GENETIC DIVERSITY; RAPID DETECTION; SPRING BLOOM; ALGAL BLOOMS; RED TIDES
Keywords
Cochlodinium polykrikoides; Genetically distinct subpopulations; Intraspecific bloom succession; Extended bloom period
Type
Article
Language
English
Document Type
Article
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