5种多溴联苯醚同系物对海洋饵料藻(亚心型扁藻和盐生杜氏藻)的急性毒性

doi:10.13634/j.cnki.mes20150503

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摘要本研究选择5种多溴联苯醚同系物(BDE-28、BDE-47、BDE-99、BDE-153和BDE-209)对2种海洋饵料藻(亚心型扁藻和盐生杜氏藻)进行急性毒性试验。96 h半抑制浓度(96 h EC₅₀)计算结果表明,BDE-28 和BDE-47的毒性较高,随溴原子取代数的增加,PBDE同系物对海洋饵料藻的毒性呈下降趋势,5种PBDE同系物对亚心形扁藻、盐生杜氏藻的96 h EC₅₀由小及大依次为:BDE-28(128,75 μg/L)、BDE-47(114,120 μg/L)、BDE-99(383,572 μg/L)、BDE-153(996,1249 μg/L)和 BDE-209(2056,1868 μg/L)。目前全球近岸海水中PBDEs浓度尚不会对海洋饵料藻产生急性毒性。海洋微藻对同种PBDE同系物的敏感性差异较大(96 h EC₅₀相差1~2个数量级),为客观评价PBDEs的海洋生态风险性,应研究PBDEs对更多种类微藻的毒性效应。

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关键词：多溴联苯醚海洋饵料藻急性毒性 96 h半抑制浓度

Abstract：In this study, acute toxicity test was used to identify the effects of five PBDE congeners, named BDE-28, BDE-47, BDE-99, BDE-153 and BDE-209, to two species of marine microalgae, Platymonas subcordiformis and Dunaliella saliva, in the laboratory.The 96-h median effective concentration (96 h EC₅₀) for each species was calculated.The results showed that BDE-28 and BDE-47 were particularly toxic to marine bait-algae and the toxicity of PBDE congeners decreased with the amount of Br atoms in the congener molecule.Ranking 96 h EC₅₀ for both P.subcordiformis and D.saliva was BDE-28(128, 75 μg/L) < BDE-47(114, 120 μg/L) EC₅₀ by one or two order of magnitude.Therefore acute tests with more species should be performed for evaluating objectively the ecological risk of PBDEs in coastal area.

Key words： polybrominateddiphenyl ethers (PBDEs) marine bait-algae acute toxicity 96h median effective concentrations(96 h EC₅₀)

收稿日期: 2013-10-15;

PACS:

基金资助:

国家自然科学基金项目(41240040)

通讯作者: 孟范平(1965-),男,山东招远人,教授,博士,博导,主要从事环境污染生物监测技术研究,E-mail:fanpingm@tom.com E-mail: fanpingm@tom.com

作者简介:胡恒(1988-),男,天津人,助理研究员,研究方向:海洋生态与海域资源管理,E-mail:99646833@qq.com

引用本文:

胡恒,于腾,孟范平等. 5种多溴联苯醚同系物对海洋饵料藻(亚心型扁藻和盐生杜氏藻)的急性毒性[J]. 海洋环境科学, 2015, 34(5): 654-660.

HU Heng,YU Teng,MENG Fan-ping et al. Acute toxicity of five brominated diphenyl ether congeners to marine bait-algae species:Platymonas subcordiformis and Dunaliella saliva[J]. Marine Environmental Science, 2015, 34(5): 654-660.

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http://hyhjkx.nmemc.org.cn/CN/10.13634/j.cnki.mes20150503 或 http://hyhjkx.nmemc.org.cn/CN/Y2015/V34/I5/654

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