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Comparison of short-term toxicity of 14 common phycotoxins(alone and in combination)to the survival of brine shrimp Artemia salina

引用

Acta Oceanologica Sinica 2023年第2期42卷 134-141页

作者： Yuting Zhang Shanshan Song Bin Zhang Yang Zhang Miao Tian Ziyi Wu Huorong Chen Guangmao Ding Renyan Liu Jingli Mu Institute of Oceanography College of Geography and OceanographyMinjiang UniversityFuzhou350108China Fuzhou Institute of Oceanography Fuzhou350108China Department of Marine Chemistry National Marine Environmental Monitoring CenterDalian116023China Fujian Marine Environment and Fishery Resource Monitoring Center Fuzhou350003China

Toxic harmful algal blooms(HABs)can cause deleterious effects in marine organisms,threatening the stability of marine *** is well known that different strains,natural populations and growth conditions of the same toxic algal species may lead to different amount of phycotoxin production and the ensuing *** fully assess the ecological risk of toxic HABs,it is of great importance to investigate the toxic effects of phycotoxins in marine *** this study,the short-term toxicity of 14 common phycotoxins(alone and in combination)in the marine zooplankton Artemia salina was *** 48 h LC_(50)of the 14 phycotoxins varied from 0.0193µg/mL to 2.415µg/*** most potent phycotoxin was azaspiracids-3(AZA3;with a LC_(50)of 0.0193µg/mL),followed by azaspiracids-2(AZA2;0.0226µg/mL),pectenotoxin-2(PTX2;0.0460µg/mL)and dinophysistoxin-1(DTX1;0.0818µg/mL).For the binary exposure,okadaic acid(OA)induced potential additive effects with DTX1,probably due to their similar structure(polyether fatty acid)and mode of action(attacking the serine/threonine phosphoprotein phosphatases).On the other hand,OA showed potential antagonistic effects with PTX2,which might be accounted for by their activation on the detoxification activity of cytochrome P450 *** addition,DTX1 induced potential synergetic effects with saxitoxin(STX),yessotoxin(YTX)or PTX2,suggesting the hazard potency of the mixtures of DTX1 and other phycotoxins(like STX,YTX and PTX2)with regard to the ecological *** results provide valuable toxicological data for assessing the impact of phycotoxins on marine planktonic species and highlight the potential ecological risk of toxic HABs in marine ecosystems.

关键词： LC_(50) harmful algal blooms binary exposure ecological risk

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