Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal.
Departamento de Química & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal; CIIMAR, Universidade do Porto, 4050-123 Porto, Portugal.
Ecotoxicol Environ Saf. 2018 Jan;147:954-962. doi: 10.1016/j.ecoenv.2017.09.051. Epub 2017 Oct 5.
Organisms in marine systems are exposed to multiple stressors that create a range of associated environmental and ecotoxicological risks. Examples of stressors include alterations related to climate change, such as temperature increase, and the exposure to pollutants arising from human activities. The present study evaluated the impacts of Arsenic exposure (1mg/L) and warming (21°C) in Mytilus galloprovincialis, acting alone and in combination. Our results demonstrated that both Arsenic exposure and warming induced oxidative stress and reduced mussels metabolism, with changes becoming more prominent with the exposure time and when mussels were exposed to both stressors in combination. Furthermore, results obtained showed higher As accumulation in organisms exposed to warming treatments. The present study showed that under warming scenarios, the negative impacts induced by As may be enhanced in ecologically and economically relevant bivalves, with potential impacts on population stocks due to increased sensitivity to pollutants, which may eventually result in biodiversity loss and socio-economic impacts.
海洋系统中的生物会暴露在多种压力源下，这些压力源会产生一系列相关的环境和生态毒理学风险。压力源的例子包括与气候变化相关的变化，如温度升高，以及人类活动产生的污染物暴露。本研究评估了砷暴露（1mg/L）和升温（21°C）单独和联合作用对贻贝（Mytilus galloprovincialis）的影响。我们的结果表明，砷暴露和升温都诱导了氧化应激，降低了贻贝的新陈代谢，随着暴露时间的延长和贻贝同时暴露于两种胁迫因素，这些变化变得更加明显。此外，研究结果还表明，在升温处理下，生物体中砷的积累量更高。本研究表明，在升温情景下，砷可能会增强对生态和经济上有重要意义的双壳类动物的负面影响，由于对污染物的敏感性增加，可能会对种群数量产生潜在影响，最终可能导致生物多样性丧失和社会经济影响。
