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Detrimental impacts of the dinoflagellate Karenia mikimotoi in Fujian coastal waters on typical marine organisms
Li, Xiaodong1,2; Yan, Tian1; Lin, Jianing1,2,3,4; Yu, Rencheng1; Zhou, Mingjiang1
2017
Source PublicationHARMFUL ALGAE
Volume61Pages:1-12
SubtypeArticle
AbstractBlooms of the toxic dinoflagellate Karenia mikimotoi (K. mikimotoi) have occurred frequently in the East China Sea in recent decades and were responsible for massive mortalities of abalones in Fujian coastal areas in 2012, however, little is known about the effects of these blooms on other marine organisms. In this study, the toxic effects and the possible mechanisms of toxicity of K. mikimotoi from Fujian coastal waters on typical marine organisms at different trophic levels, including zooplankton (Brachionus plicatilis, Artemia salina, Calanus sinicus, and Neomysis awatschensis) and aquaculture species (Penaeus vannamei and Scophthalmus maximus) were investigated. At a bloom density of 3 x 10(4) cells/mL, the Fujian strain of K. mikimotoi significantly affected the tested organisms, which had mortality rates at 96 h of 100, 23, 20, 97, 33, and 53%, respectively. Moreover, the intact cell suspension was toxic to all tested species, whereas cell-free culture and the ruptured cell suspension had no significant effects on the tested organisms. Possible mechanisms for this toxic effect, including reactive oxygen species (ROS) and hemolytic toxins, were evaluated. For K. mikimotoi, 0.014 +/- 0.004 OD/(10(4) cells) superoxide (O-2(-)) and 3.00 +/- 0.00 nmol/(10(4) cells) hydrogen peroxide (H2O2) were measured, but hydrogen peroxide did not affect rotifers at that concentration, and rotifers were not protected from the lethal effects of K. mikimotoi when the enzymes superoxide dismutase and catalase were added to counteract the ROS. The lipophilic extract of K. mikimotoi had a hemolytic effect on rabbit erythrocytes but exhibited no significant toxicity. These results suggest that this strain of K. mikimotoi can have detrimental effects on several typical marine organisms and that its toxicity may be associated with intact cells but is not related to ROS or hemolytic toxins. (C) 2016 Elsevier B.V. All rights reserved.
KeywordKarenia Mikimotoi Lethal Effect Marine Organisms Reactive Oxygen Species Hemolytic Activity
DOI10.1016/j.hal.2016.11.011
Indexed BySCI
Language英语
WOS IDWOS:000392890000001
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/136309
Collection实验海洋生物学重点实验室
海洋生态与环境科学重点实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Shandong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China
4.Chinese Res Inst Environm Sci, Lab Riverine Ecol Conservat & Technol, Beijing 100012, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li, Xiaodong,Yan, Tian,Lin, Jianing,et al. Detrimental impacts of the dinoflagellate Karenia mikimotoi in Fujian coastal waters on typical marine organisms[J]. HARMFUL ALGAE,2017,61:1-12.
APA Li, Xiaodong,Yan, Tian,Lin, Jianing,Yu, Rencheng,&Zhou, Mingjiang.(2017).Detrimental impacts of the dinoflagellate Karenia mikimotoi in Fujian coastal waters on typical marine organisms.HARMFUL ALGAE,61,1-12.
MLA Li, Xiaodong,et al."Detrimental impacts of the dinoflagellate Karenia mikimotoi in Fujian coastal waters on typical marine organisms".HARMFUL ALGAE 61(2017):1-12.
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