Succession phenomenon of Cochlodinium polykrikoides and Alexandrium affine related with changes of coastal environments in the southern sea of Korea in summer

DC Field Value Language
dc.contributor.author 임영균 -
dc.contributor.author 백승호 -
dc.contributor.author 김진호 -
dc.contributor.author 이민지 -
dc.contributor.author 김영옥 -
dc.contributor.author 신현호 -
dc.date.accessioned 2020-07-15T10:32:12Z -
dc.date.available 2020-07-15T10:32:12Z -
dc.date.created 2020-02-11 -
dc.date.issued 2018-10-29 -
dc.identifier.uri https://sciwatch.kiost.ac.kr/handle/2020.kiost/22943 -
dc.description.abstract Among the harmful algal blooms (HABs) species, the dinoflagellate Cochlodinium, and Alexandrium species have been studied widely, due to their serious damages to the aquaculture industry. The present study investigated the appearance and succession patterns of HABs in the Korean coasts, and performed the bioassay using Cochlodinium polykrikoides and Alexandrium affine cultures to evaluate their competitive relationship and explain the succession phenomenon of HABs. From Juneto August, surface water temperature increased from 20.3°C to 26.8°C and the salinity decrease from 33.9 to 31.8 psu, and the stratification developed strongly. In this time, nutrient concentrations were kept low in surface layer, then dinoflagellate HABs species, C. polykrikoides, dominated in zone I, but A. affine dominated both zone I and II in middle August. In growth experiments, C. polykrikoides did not grow at 20 psu of 25 °C and 27°C, and it was dead within 2 daysin all cultivation of 30°C. The maximum growth rate (μmax) of C. polykrikoides was 0.31 d-1 at 25°C of 32 psu. A. affine showed negative growth rates at 15°C, but it grew well in all salinity at 20 °C to 30 °C. The maximum growth rate (μmax) of A. affine was 0.43 d-1 at 25 °C of 30 psu. In co-cultivation, A. affine had a competitive advantage at all temperatures, which of 1: 1 ratio of initial cell density of both species. In co-cultivations of gradient initial cellccession patterns of HABs in the Korean coasts, and performed the bioassay using Cochlodinium polykrikoides and Alexandrium affine cultures to evaluate their competitive relationship and explain the succession phenomenon of HABs. From Juneto August, surface water temperature increased from 20.3°C to 26.8°C and the salinity decrease from 33.9 to 31.8 psu, and the stratification developed strongly. In this time, nutrient concentrations were kept low in surface layer, then dinoflagellate HABs species, C. polykrikoides, dominated in zone I, but A. affine dominated both zone I and II in middle August. In growth experiments, C. polykrikoides did not grow at 20 psu of 25 °C and 27°C, and it was dead within 2 daysin all cultivation of 30°C. The maximum growth rate (μmax) of C. polykrikoides was 0.31 d-1 at 25°C of 32 psu. A. affine showed negative growth rates at 15°C, but it grew well in all salinity at 20 °C to 30 °C. The maximum growth rate (μmax) of A. affine was 0.43 d-1 at 25 °C of 30 psu. In co-cultivation, A. affine had a competitive advantage at all temperatures, which of 1: 1 ratio of initial cell density of both species. In co-cultivations of gradient initial cell -
dc.description.uri 1 -
dc.language English -
dc.publisher PICES -
dc.relation.isPartOf PICES -
dc.title Succession phenomenon of Cochlodinium polykrikoides and Alexandrium affine related with changes of coastal environments in the southern sea of Korea in summer -
dc.type Conference -
dc.citation.conferencePlace JA -
dc.citation.endPage 190 -
dc.citation.startPage 190 -
dc.citation.title PICES -
dc.contributor.alternativeName 임영균 -
dc.contributor.alternativeName 백승호 -
dc.contributor.alternativeName 김진호 -
dc.contributor.alternativeName 이민지 -
dc.contributor.alternativeName 김영옥 -
dc.contributor.alternativeName 신현호 -
dc.identifier.bibliographicCitation PICES, pp.190 -
dc.description.journalClass 1 -
Appears in Collections:
South Sea Research Institute > Library of Marine Samples > 2. Conference Papers
South Sea Research Institute > Risk Assessment Research Center > 2. Conference Papers
Ocean Climate Solutions Research Division > Ocean Climate Response & Ecosystem Research Department > 2. Conference Papers
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