...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Science of the Total Environment >Multiple stressors in estuarine waters: Effects of arsenic and salinity on Ruditapes philippinarum
【24h】

Multiple stressors in estuarine waters: Effects of arsenic and salinity on Ruditapes philippinarum

机译：河口水域的多种应激源：砷和盐分对菲律宾蛤仔的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Marine organisms are constantly exposed to multiple stressors creating a range of associated environmental and ecotoxicological risks. Several stressors have been identified as key drivers of environmental change that may significantly influence marine near-shore systems. These include increased frequency and duration of extreme rainy events and drought periods, arising from climate change, and the constant discharge of contaminants into aquatic systems. A growing body of evidence demonstrates that climate change can have direct and indirect impacts on marine organisms although the combined effects with other stressors, namely with metals and metalloids, have received very little attention to date. The present study evaluated the biochemical alterations induced in the clam Ruditapes philippinarum, also known as Manila clam, when simultaneously exposed (96 h) to different arsenic concentrations (0,4 and 17 mg/L) and a range of salinities (14,21,28,35 and 42 g/L). Results obtained revealed that, when acting alone, both stressors induced oxidative stress in clams, with higher LPO levels and lower GSTs activity induced by As contamination, and a stronger inhibition of the antioxidant defenses induced by salinity increase. Furthermore, when exposed to the combination of both stressors, clams experienced stronger biochemical alterations, presenting higher LPO increases and greater decreases of antioxidant enzymes, especially noticed at higher salinities. The present findings may indicate that climate change, including predicted drought periods that will increase salinities in aquatic systems, will seriously affect the clam R. philippinarum, especially those inhabiting contaminated ecosystems.
机译：海洋生物不断暴露于多种压力下，造成一系列相关的环境和生态毒理风险。已经确定了几种压力因素是环境变化的主要驱动力，它们可能会严重影响海洋近岸系统。这些包括气候变化引起的极端降雨事件和干旱时期的频率和持续时间的增加，以及污染物不断排放到水生系统中。越来越多的证据表明，尽管迄今为止与其他压力源（即金属和准金属）的综合影响很少受到关注，但气候变化可能对海洋生物产生直接和间接的影响。本研究评估了同时暴露（96 h）不同砷浓度（0,4和17 mg / L）和一定盐度（14,21）的菲律宾蛤仔（Ruditapes philippinarum）（也称为马尼拉蛤）诱导的生化变化。 ，28,35和42 g / L）。获得的结果表明，当单独发挥作用时，两种应激源均会引起蛤lam的氧化应激，砷污染所致的LPO含量较高，GST活性较低，而盐度所致的抗氧化防御作用的抑制作用更强。此外，当蛤both暴露于两种应激源的组合下时，它们会经历更强的生化变化，尤其是在较高盐度下，蛤L的LPO升高，抗氧化酶的降低更大。目前的发现可能表明，气候变化，包括预计的干旱时期，将会增加水生系统的盐分含量，将严重影响菲律宾蛤，特别是那些栖息在受污染的生态系统中的蛤。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号