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Sensitivity of a Large and Representative Sample of Antarctic Marine Invertebrates to Metals

机译：南极海洋无脊椎动物的大型代表性样品对金属的敏感性

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There are limited data on the sensitivity to contaminants of marine organisms in polar regions. Consequently, assessments of the risk of contaminants to marine biota in polar environments typically include extrapolations from temperate and/or tropical species. This is problematic because the taxonomic composition of organisms differs between polar and temperate/tropical waters, and both the toxicity of chemicals and the physiology of organisms are very different at the stable low temperatures experienced in polar marine systems. Collecting high-quality sensitivity data for a wide range of marine polar organisms using traditional toxicity assessment approaches is a time-consuming and difficult process, especially in remote and hostile environments. We applied a rapid toxicity testing approach, which allowed a much larger number of species to be tested than would be possible with traditional toxicity test methods, albeit with lower replications and fewer exposure concentrations. With this rapid approach, sensitivity estimates are less precise, but more numerous. This is important when constructing species sensitivity distributions (SSDs), which aim to represent the sensitivity of communities. We determined the approximate sensitivity (4- and 10-d median lethal concentration [LC50] values) of a large and representative sample of Antarctic marine invertebrates to copper (Cu), zinc (Zn), and cadmium (Cd). Up to 88 LC50 values (from 88 different taxa) were used in the construction of SSDs. The hazardous concentrations for 1% of taxa (HC1) based on 10-d LC50 values were 37, 346, and 792 mu g/L for Cu, Zn, and Cd, respectively. Our results provide a basis for estimating the risk of exposure to metals for a large representative sample of marine polar invertebrates. Environ Toxicol Chem 2019;38:1560-1568. (c) 2019 SETAC
机译：关于极地地区海洋生物对污染物的敏感性的数据有限。因此，对极性环境中海洋生物区系污染物风险的评估通常包括温带和/或热带物种的推断。这是有问题的，因为在极地和温带/热带水域中生物的生物分类组成是不同的，并且在极地海洋系统中经历的稳定的低温下，化学物的毒性和生物的生理学都非常不同。使用传统的毒性评估方法收集各种海洋极地生物的高质量敏感性数据是一个耗时且困难的过程，尤其是在偏远和敌对的环境中。我们采用了快速的毒性测试方法，与传统的毒性测试方法相比，它可以测试的物种数量更多，尽管重复性较低且暴露浓度较低。使用这种快速方法，灵敏度估计值不那么精确，但数量更多。在构建旨在代表社区敏感性的物种敏感性分布（SSD）时，这一点很重要。我们确定了一个大型且具有代表性的南极海洋无脊椎动物样品对铜（Cu），锌（Zn）和镉（Cd）的近似敏感性（4和10 d中值致死浓度[LC50]值）。 SSD的构造使用了多达88个LC50值（来自88个不同的分类单元）。基于10天LC50值，每1％的紫杉类（HC1）的有害浓度分别为Cu，Zn和Cd，分别为37、346和792μg / L。我们的结果为估算大量代表性海洋无脊椎动物样本暴露于金属的风险提供了基础。 Environ Toxicol Chem 2019; 38：1560-1568。 （c）2019年SETAC

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