Department of Chemistry, Aquatic Systems Research Group. UNESCO/UNITWIN WiCop. International Campus of Excellence of the Sea (CEIMAR), Cádiz, Spain.
Department of Chemistry, Aquatic Systems Research Group. UNESCO/UNITWIN WiCop. International Campus of Excellence of the Sea (CEIMAR), Cádiz, Spain.
Sci Total Environ. 2017 Oct 1;595:759-768. doi: 10.1016/j.scitotenv.2017.04.004. Epub 2017 Apr 11.
CO increases in the ocean may occur both by the capacity of CO exchanges with its dissolved form between atmosphere and surface seawater as well by CO leaks during the carbon capture and storage (CCS) process. The decrease in seawater pH may result in a reduction in the concentration of both hydroxide and carbonate (OH and CO). The main aim of this work is to conduct an ecotoxicology comparative survey using two amphipod species from Europe and Brazil exposed to different acidification (CO) scenarios. For it, an integrative approach based on the weight of evidence was used for comparative proposes to identify the effects on the amphipods association with the acidification and with the related mobility of metals. The results demonstrate that the Ampelisca brevicornis species is more sensitive to pH reductions than the Hyale youngi species. Furthermore, this study has demonstrated that the CO enrichment in aquatic ecosystems would cause changes on the mobility of certain metals (Zn, Cu and As). The results of Principal Component Analysis (PCA) showed that the dissolved Zn in overlying water was strongly correlated with the decrease in the pH and was associated with increased toxicity of the sediment to the exposed organisms, mainly for the A. brevicornis species from Spain. Nevertheless, similar results were found in relation to the mortality of amphipods in low pH values for all sediment tested. Concluding, it is highlighted the importance of comparative studies in different types of environment and improve the understood of the risks associated with the ocean acidification.
海洋中的 CO 增加既可以通过 CO 与大气和表层海水中溶解形式之间的交换能力来实现，也可以通过碳捕获和储存 (CCS) 过程中的 CO 泄漏来实现。海水 pH 值的降低可能导致氢氧根和碳酸根（OH 和 CO）浓度的降低。本工作的主要目的是使用来自欧洲和巴西的两种端足类动物进行比较生态毒理学调查，这些动物暴露于不同的酸化（CO）情景下。为此，使用基于证据权重的综合方法进行了比较研究，以确定酸化和相关金属迁移性对端足类动物的影响。结果表明，Ampelisca brevicornis 物种对 pH 值降低比 Hyale youngi 物种更敏感。此外，本研究表明，水生生态系统中 CO 的富集会导致某些金属（Zn、Cu 和 As）的迁移性发生变化。主成分分析（PCA）的结果表明，上层水中溶解的 Zn 与 pH 值的降低密切相关，并与暴露生物的沉积物毒性增加有关，特别是对来自西班牙的 A. brevicornis 物种。然而，在所有测试的沉积物中，低 pH 值下端足类动物死亡率的相似结果也被发现。总之，强调了在不同类型的环境中进行比较研究的重要性，并提高了对海洋酸化相关风险的理解。
