海洋酸化
生物累积
Mercury(编程语言)
桡足类
环境化学
生物群
甲基汞
二氧化碳
海水
生态系统
海洋生态系统
环境科学
生态学
生物
化学
甲壳动物
计算机科学
程序设计语言
作者
Luman Cheng,Zhuoan Bai,Hui Wei,Yao Chen,Minghua Wang
标识
DOI:10.1016/j.marpolbul.2023.115016
摘要
Coastal waters have experienced fluctuations in partial pressure of carbon dioxide (pCO2) and mercury (Hg) pollution, yet little is known concerning how natural pCO2 fluctuations affect Hg biotoxicity. Here, a marine copepod Tigriopus japonicus was interactively exposed to different seawater pCO2 (ambient 400, steady elevated 1000, and fluctuating elevated 1000 ± 600 μatm) scenarios and Hg (control, 2 μg/L) treatments for 7 d. The results showed that elevated pCO2 decreased Hg bioaccumulation, and it was even more under fluctuating elevated pCO2 condition. We found energy depletion and oxidative stress under Hg-treated copepods, while combined exposure initiated compensatory response to alleviate Hg toxicity. Intriguingly, fluctuating acidification presented more immune defense related genes/processes in Hg-treated copepods when compared to steady acidification, probably linking with the greater decrease in Hg bioaccumulation. Collectively, understanding how fluctuating acidification interacts with Hg contaminant will become more crucial in predicting their risks to coastal biota and ecosystems.
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