Effect of marine heatwaves on bloom formation of the harmful dinoflagellate Cochlodinium polykrikoides: Two sides of the same coin?Effect of marine heatwaves on bloom formation of the harmful dinoflagellate Cochlodinium polykrikoides: Two sides of the same coin?
- Other Titles
- Effect of marine heatwaves on bloom formation of the harmful dinoflagellate Cochlodinium polykrikoides: Two sides of the same coin?
- Authors
- Lim, Young Kyun; Park, Bum Soo; Kim, Jin Ho; Baek, Sang-Soo; Baek, Seung Ho
- Issue Date
- Apr-2021
- Publisher
- ELSEVIER
- Keywords
- Heatwaves; High water temperature; Stratification; HABs; Cochlodinium polykrikoides; Intraspecific physiological characteristics
- Citation
- HARMFUL ALGAE, v.104
- Indexed
- SCIE
SCOPUS
- Journal Title
- HARMFUL ALGAE
- Volume
- 104
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/189231
- DOI
- 10.1016/j.hal.2021.102029
- ISSN
- 1568-9883
- Abstract
- In 2018, the bloom of harmful dinoflagellate Cochlodinium polykrikoides occurred under abnormally high water temperature (WT) conditions caused by heatwaves in Korean coastal water (KCW). To better understand C. polykrikoides bloom at high WTs in 2018, we conducted field survey and laboratory experiments (the physiological and genetic differences between the two strains, CP2013 and CP2018). The heatwave increased the WT from 24.1 degrees C to 29.2 degrees C for two weeks, leading to strong stratification even in mid July (p < 0.01, Chi square = 94.656, Kruskal-Wallis test). Under early stratification conditions, patch blooms formed more earlier than the average outbreak in the last 17 years in KCW, despite high WT reaching 30 degrees C. In laboratory experiments, although there were no genetic differences in the LSU rDNA, both strains showed a significant different growth response to high WTs; above 28 degrees C, CP2013 did not survive, but CP2018 was able to grow, suggesting that CP2018 had potential growth capacity at high WTs. However, the growth rate and yield of the culture (CP2018) were lowered at 30 degrees C. Also, the blooms of C. polykrikoides in 2018 lasted only 3 weeks, which is unusual short compared to the average duration since 2002. The negative correlation between the average WT and duration of C. polykrikoides bloom in previous 17 years (R-2 = 0.518, p < 0.01) supports that high WT approaching 30 degrees C is not favorable for C. polykrikoides in KCW. Thus, our findings indicated that in relation to heatwaves, early stratification condition plays a critical role in developing C. polykrikoides blooms, but maintaining bloom are negatively affected under high WT conditions.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 자연과학대학 > 서울 생명과학과 > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.