邻苯二甲酸二丁酯对海洋微藻生长的影响

发布时间：2018-04-26 14:16

本文选题：邻苯二甲酸二丁酯 + 海洋微藻　；参考：《生态毒理学报》2016年02期

【摘要】：近年来,内陆和近海水体中的一种典型环境激素邻苯二甲酸二丁酯(DBP)含量显著上升,但其对海洋生态系统的影响并不明确。本研究选取7种海洋微藻为实验材料,包括1种甲藻(东海原甲藻Prorocentrum donghaiense),2种定鞭藻(小普林藻Prymesium parvum和球形棕囊藻Phaeocystis globosa),2种硅藻(中肋骨条藻Skeletonema costatum和三角褐指藻Phaeodactylum tricornutum),以及1种隐藻(红胞藻Rhodomonus salina)和1种绿藻(海洋小球藻Chlorella sp.),设置5个DBP暴露浓度(5、10、20、50、100μg·L-1),研究其对海洋微藻生长的影响,并探索DBP暴露对微藻抗氧化系统和光合系统的影响。结果表明:在所有暴露组中,球形棕囊藻、小普林藻、东海原甲藻、红胞藻、海洋小球藻生长速率显著增加;5~20μg·L-1的DBP暴露下中肋骨条藻不受影响,50、100μg·L-1下受到抑制;所有DBP暴露组对三角褐指藻没有显著影响。在50μg·L-1DBP暴露下,随着时间的延长,球形棕囊藻的SOD、CAT、MDA均表现出先升高后下降的趋势,第7天藻的叶绿素a、叶绿素b,类胡萝卜素含量较对照组分别增加了23%、10%、48%,球形棕囊藻光系统II(PSII)的最大光能转化效率(Fv/Fm)、PSII的潜在活性(Fv/F0)、光合性能指数PI分别增加了4.8%、16%、69%。研究发现DBP对海洋微藻的影响具有种间差异性,能够显著促进有害赤潮藻球形棕囊藻的生长,近岸水体DBP含量的增加可能改变浮游植物群落组成,进而增加有害藻华暴发的风险。
[Abstract]:In recent years, the content of dibutyl phthalate (DBP), a typical environmental hormone in inland and offshore waters, has increased significantly, but its effect on marine ecosystem is not clear. In this study, seven species of marine microalgae were selected as experimental materials. There are two species of dinoflagellates (Prorocentrum donghaienseus, Prorocentrum donghaiensei) and two diatoms (Skeletonema costatum and Phaeodactylum tricornutumum), and one species Rhodomonus Salina and one species of chlorophyta (Chlorophyta) (Phaeopsis sinensis, Prymesium parvum and Phaeocystis globosae), including two species of diatoms (Skeletonema costatum and Phaeodactylum tricornutumum), and one species of cryptophaga (Rhodomonus salina) and one species of chlorophyta (Chlorophyta). The effects of 5 DBP concentrations on the growth of marine microalgae, Chlorella sp. sp., 50 渭 g / L ~ (-1), were studied. The effects of DBP exposure on antioxidant system and photosynthetic system of microalgae were investigated. The results showed that the growth rate of Phaeocystis globosa, Pulin, Prorocentrum, erythrocystis and Chlorella marine chlorella increased significantly in all exposed groups under exposure to DBP with 20 渭 g / L DBP, and the growth rate was not inhibited at 50100 渭 g 路L ~ (-1). All DBP exposure groups had no significant effect on Phaeopsis triangularis. After exposure to 50 渭 g L-1DBP, the L-1DBP of Phaeocystis globosa increased first and then decreased with the prolongation of time. On the 7th day, the contents of chlorophyll a, chlorophyll b, carotenoid in algae increased by 23%, and the maximum light energy conversion efficiency (FV / FmCII) of Phaeocystis globosa light system IIP PSII was higher than that of the control group, and the potential activity of PSII was FV / F0, and the photosynthetic performance index (Pi) was increased by 4.816 ~ 6969. It was found that the effect of DBP on marine microalgae was interspecific, which could promote the growth of harmful red tide algae, and the increase of DBP content in coastal waters might change the composition of phytoplankton community. This increases the risk of harmful algal blooms.
【作者单位】：暨南大学生态学系水生生物研究所;珠江水利科学研究院;环境保护部华南环境科学研究所;
【基金】：国家自然科学基金项目(41576159,21307140,U1133003)
【分类号】：X55

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