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Metabolic Response of the Two Marine Unicellular Algae Chlorella salina and Dunaliella bardawil to Toxicity of the Antifouling Agent Irgarol 1051  [PDF]
Mona Kaamoush
Journal of Environmental Protection (JEP) , 2018, DOI: 10.4236/jep.2018.99056
Abstract: Toxic pollutants are metabolic poisons that can seriously injure or destroy the photosynthetic organisms upon which the food chain depends. Since microalgae play a key role in marine ecosystems, marine microalgae are proposed as excellent bio-indicators of pollution due to their high sensitivity, which can give warning of the toxic effects of chemicals sooner than any other species. The aim of this work concentrated on the effect of different concentrations of the antifouling biocide (Irgarol 1051) on growth and chlorophylls content (as an essential metabolite) of the two marine unicellular green algae Chlorella salina and Dunaliella bardawil that usually used in fish feeding. The growth of the wall-less Dunaliella bardawil was more sensitive to Irgarol 1051 than the walled cells Chlorella salina, although the concentrations used were greatly different. The product of photosynthesis in the two algal species greatly affected since in the presence of Irgarol 1051, a serious destructive effect was observed. The cell wall appeared to play a significant role in protecting the organism against toxicity of the antifouling agent either by adsorption or degradation. The strength of toxicity depends mainly on the concentration of the antifouling agent, the length of culturing period and the type of organism tested.
环境化学 , 2015,
Abstract: Irgarol1051是目前使用最多的海洋防污剂之一,已在世界范围内的自然水体中检测到Irgarol1051的存在,并在新加坡海域检测到其在水环境中的最高浓度为4.2μg·L-1.它的存在严重影响着非目标生物的生存和生长,且可改变生态群落的种群组成与丰度,严重威胁水生生态系统的健康和安全.本文对Irgarol1051的主要性质、环境行为及其生态效应进行综述,以期为进一步研究打下基础.
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