Thorium Exposure Drives Fatty Acid and Metal Transfer from Biofilms to the Grazer Lymnaea sp.,Environmental Toxicology and Chemistry

当前位置： X-MOL 学术 › Environ. Toxicol. Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Thorium Exposure Drives Fatty Acid and Metal Transfer from Biofilms to the Grazer Lymnaea sp.
Environmental Toxicology and Chemistry ( IF 3.6 ) Pub Date : 2021-04-09 , DOI: 10.1002/etc.5067
Caroline Doose ₁ , Mariem Fadhlaoui ₁ , Soizic Morin ₂ , Claude Fortin ₁

Affiliation

Aquatic ecotoxicological risks associated with tetravalent metallic elements such as thorium (Th) are still poorly understood. Periphytic biofilm represents an important food source in aquatic environments; thus, such risks could severely affect nutrient and energy cycling in these ecosystems. The present study investigated the potential for Th to change the fatty acid composition of biofilm communities. Bioaccumulation of Th and fatty acids were measured after 4 wk to 2 exposure conditions: a control (C0) and Th exposure (C10). Some major fatty acids such as C16:1n-7 and docosahexaenoic acid C22:6n-3 differed significantly between control and C10 conditions. To determine if Th can be trophically transferred and to investigate the impacts of nutritional quality changes on primary consumers, common pond snails (Lymnaea sp.) were fed for 4 wk with control and Th-exposed biofilm. Thorium appeared to be trophically transferable to the grazers, although we cannot exclude that part of the Th accumulated by the snails may have been taken from the water through release from the biofilms. The composition of major fatty acids observed in the grazers was also significantly affected, notably by a decrease of total polyunsaturated fatty acids. These results indicate that very low Th concentrations can decrease the nutritional quality of organisms at the base of the food chain. Environ Toxicol Chem 2021;40:2220–2228. © 2021 SETAC

中文翻译：

钍暴露驱动脂肪酸和金属从生物膜转移到 Grazer Lymnaea sp。

与钍 (Th) 等四价金属元素相关的水生生态毒理学风险仍然知之甚少。附生生物膜是水生环境中重要的食物来源；因此，此类风险可能会严重影响这些生态系统中的养分和能量循环。本研究调查了 Th 改变生物膜群落脂肪酸组成的潜力。在 4 周到 2 个暴露条件：对照 (C0) 和 Th 暴露 (C10) 后测量 Th 和脂肪酸的生物累积。一些主要脂肪酸如 C16:1n-7 和二十二碳六烯酸 C22:6n-3 在对照和 C10 条件之间存在显着差异。确定 Th 是否可以进行营养转移并调查营养质量变化对初级消费者、普通池塘蜗牛 ( Lymnaea ) 的影响sp.) 与对照和 Th 暴露的生物膜一起喂食 4 周。钍似乎可以营养地转移给食草动物，尽管我们不能排除蜗牛积累的部分钍可能是通过从生物膜中释放而从水中获取的。在食草动物中观察到的主要脂肪酸的组成也受到显着影响，特别是总多不饱和脂肪酸的减少。这些结果表明，非常低的 Th 浓度会降低食物链底部生物的营养质量。环境毒物化学2021；40:2220–2228。© 2021 SETAC

更新日期：2021-04-09

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11