| 沉积相硒对夹杂带丝蚓的生物累积及效应研究 |
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| 引用本文： | 李丹,杨纪琛,孙炜钧,李潇,雷浩俊,韦新蓉,陈红星,谢凌天.沉积相硒对夹杂带丝蚓的生物累积及效应研究[J].华南师范大学学报(自然科学版),2022,54(6):51-58. |
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| 作者姓名： | 李丹 杨纪琛 孙炜钧 李潇 雷浩俊 韦新蓉 陈红星 谢凌天 |
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| 作者单位： | 1.上海应用技术大学，上海 201418 |
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| 基金项目： | 国家自然科学基金项目42107292国家自然科学基金项目42177256国家自然科学基金项目42177257科技部重点专项子课题2018YFC1801200广东省基础与应用基础研究基金项目2019A1515110789 |
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| 摘 要： | 以底栖模式生物夹杂带丝蚓(Lumbriculus variegatus)为研究对象，在环境相关浓度的沉积相Se(Ⅳ)中暴露21 d后，通过ICP-MS定性定量硒在带丝蚓体内的含量及形态。硒在环境相关浓度下可以有效地在夹杂带丝蚓体内累积，形态主要以Se-Met和Se-Cys为主。此外，沉积相中硒可以促进夹杂带丝蚓体内氧化应激反应、降低Na+/K+-ATP酶活性以及消化系统相关酶活性，从而抑制夹杂带丝蚓的肥满度增长以及对沉积物中硒的生物富集能力。结果表明:环境相关浓度的沉积相Se(Ⅳ)可能影响硒在底栖生物中的累积及其形态的分布，并形成生物效应。研究结果为阐明沉积物中硒对底栖生物的生物累积及效应提供了重要的理论依据和数据支撑。
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| 关 键 词： | 硒 底栖生物 硒的形态 生物累积 生物效应 |
| 收稿时间： | 2022-02-20 |
The Biological Accumulation and Effects of Selenium in Sediments on the Oligochaete, Lumbriculus Variegatus |
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| Affiliation: | 1.Shanghai Institute of Technology, Shanghai 201418, China2.SCNU Environmental Research Institute, South China Normal University/Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety/MOE Key Laboratory of Theoretical Chemistry of Environment, Guangzhou 510006, China3.School of Environment, South China Normal University, Guangzhou 510006, China |
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| Abstract: | In the L. variegatus, Se-Met and Se-Cys were the main Se species. The benthic model organism, Lumbriculus variegatus, was used to quantify the content and morphology of selenium in the Lumbriculus by ICP-MS after 21 d exposure to environmentally relevant concentrations of the sedimentary phase Se(Ⅳ). The results showed that selenium could effectively accumulate in the Lumbriculus at environmentally relevant concentrations, and the morphology was mainly dominated by Se-Met and Se-Cys. In addition, Se at environmental related concentrations in the sediment increased the oxidative stress, inhibited the activities of Na+/K+-ATP enzyme and digestive enzymes of L. variegatus, inducing the decrease of condition factors and bioaccumulation. The results shed a light on the Se species, biological accumulation and effect of Se(Ⅳ) in sediments in the benthos, and provide theoretical basis and fundamental data for the bioaccumulation and effects of selenium in sediments. |
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