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| DOI | 10.1039/d3em00482a |
| Isotopes and otolith chemistry provide insight into the biogeochemical history of mercury in southern flounder across a salinity gradient | |
| 发表日期 | 2024 |
| ISSN | 2050-7887 |
| EISSN | 2050-7895 |
| 起始页码 | 26 |
| 结束页码 | 2 |
| 卷号 | 26期号:2 |
| 英文摘要 | Methylmercury (MeHg) continues to pose a significant global health risk to wildlife and humans through fish consumption. Despite numerous advancements in understanding the mercury (Hg) cycle, questions remain about MeHg sources that accumulate in fish, particularly across transitional coastal areas, where harvest is prominent and Hg sources are numerous. Here we used a unique combination of Hg and nutrient isotopes, and otolith chemistry to trace the biogeochemical history of Hg and identify Hg sources that accumulated in an economically important fish species across Mobile Bay, Alabama (USA). Fish tissue Hg in our samples primarily originated from wet deposition within the watershed, and partly reflected legacy industrial Hg. Results also suggest that little Hg was lost through photochemical processes (<10% of fish tissue Hg underwent photochemical processes). Of the small amount that did occur, photodegradation of the organic form, MeHg, was not the dominant process. Biotic transformation processes were estimated to have been a primary driver of Hg fractionation (similar to 93%), with isotope results indicating methylation as the primary biotic fractionation process prior to Hg entering the foodweb. On a finer scale, individual lifetime estuarine habitat use influenced Hg sources that accumulated in fish and fish Hg concentrations, with runoff from terrestrial Hg sources having a larger influence on fish in freshwater regions of the estuary compared to estuarine regions. Overall, results suggest increases in Hg inputs to the Mobile Bay watershed from wet deposition, turnover of legacy sources, and runoff are likely to translate into increased uptake into the foodweb. |
| 语种 | 英语 |
| WOS研究方向 | Chemistry ; Environmental Sciences & Ecology |
| WOS类目 | Chemistry, Analytical ; Environmental Sciences |
| WOS记录号 | WOS:001153140800001 |
| 来源期刊 | ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/299600 |
| 作者单位 | University System of Maryland; University of Maryland College Park; Clemson University |
| 推荐引用方式 GB/T 7714 | . Isotopes and otolith chemistry provide insight into the biogeochemical history of mercury in southern flounder across a salinity gradient[J],2024,26(2). |
| APA | (2024).Isotopes and otolith chemistry provide insight into the biogeochemical history of mercury in southern flounder across a salinity gradient.ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS,26(2). |
| MLA | "Isotopes and otolith chemistry provide insight into the biogeochemical history of mercury in southern flounder across a salinity gradient".ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS 26.2(2024). |
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