Department of Applied Environmental Science (ITM), Stockholm University, Svante Arrhenius Väg 8, SE-106 91 Stockholm, Sweden.
Ecotoxicol Environ Saf. 2011 May;74(4):636-42. doi: 10.1016/j.ecoenv.2010.09.013. Epub 2010 Oct 20.
Cu is a major active component in anti-fouling paints, which may reach toxic levels in areas with intense boat traffic and therefore is a metal of environmental concern. The bioavailability of metals is influenced by factors such as salinity and organic matter measured as total organic carbon (TOC). The influence of these two factors was studied, with a focus on brackish water conditions, by exposing a marine and a brackish water clone of the red macroalga Ceramium tenuicorne to Cu in different combinations of artificial seawater (salinity 5-15‰) and TOC (0-4 mg/L) in the form of fulvic acid (FA). In addition, the toxicity of Cu to both clones was compared in salinity 10‰ and 15‰. The results show that by increasing TOC from 0 to 2 and 4 mg/L, Cu was in general less toxic to both algal clones at all salinities tested (p<0.05). The effect of salinity on Cu toxicity was not as apparent, both a positive and negative effect was observed. The brackish water clone showed generally to be more sensitive to Cu in salinity 10‰ and 15‰ than the marine counterpart. In conclusion, FA reduced the Cu toxicity overall. The Cu tolerance of both strains at different salinities may reflect their origin and their adaptations to marine and brackish water.
铜是防污漆中的主要活性成分，在船只交通密集的区域，其含量可能达到有毒水平，因此是一种受到环境关注的金属。金属的生物有效性受盐度和总有机碳（TOC）等因素的影响，TOC 是有机物质的测量值。本研究重点关注咸水条件，通过在人工海水中以富里酸（FA）的形式（盐度为 5-15‰），并结合 TOC（0-4mg/L），暴露于铜，研究了这两个因素对海洋和咸水两种红藻 Cerium tenuicorne 克隆体的影响。此外，还比较了这两种克隆体在盐度为 10‰和 15‰时铜的毒性。结果表明，随着 TOC 从 0 增加到 2 和 4mg/L，铜对所有测试盐度下的两种藻类克隆体的毒性通常降低（p<0.05）。盐度对铜毒性的影响并不明显，观察到了正、负两种效应。与海洋克隆体相比，咸水克隆体在盐度为 10‰和 15‰时对铜的敏感性通常更高。总之，FA 降低了铜的毒性。两种菌株在不同盐度下的铜耐受性可能反映了它们的起源及其对海洋和咸水的适应。
