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Habitual feeding patterns impact polystyrene microplastic abundance and potential toxicity in edible benthic mollusks

文献类型： 外文期刊

作者： Wang, Senyang 1 ; Zheng, Liang 2 ; Shen, Mengyan 1 ; Zhang, Longsheng 1 ; Wu, Yiting 1 ; Li, Guangyu 3 ; Guo, Chuanbo 4 ; Hu, Cunzhi 1 ; Zhang, Mingming 1 ; Sui, Yanming 1 ; Dong, Xuexing 1 ; Lv, Linlan 1 ;

作者机构： 1.Yancheng Inst Technol, Coll Marine & Biol Engn, Yancheng 224002, Peoples R China

2.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai, Peoples R China

3.Huazhong Agr Univ, Coll Fisheries, Wuhan 430070, Peoples R China

4.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China

5.Univ Rostock, Inst Biol Sci, Dept Marine Biol, Rostock, Germany

关键词： Polystyrene microplastic; Filter-feeding; Deposit-feeding; Ingestion and clearance; Stress response

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）

ISSN： 0048-9697

年卷期： 2023 年 866 卷

页码：

收录情况： SCI

摘要： That increasing microplastics (MPs, <5 mm) eventually end up in the sediment which may become a growing menace to diverse benthic lives is worthy of attention. In this experiment, three edible mollusks including one deposit-feeding gastropod (Bullacta exarate) and two filter-feeding bivalves (Cyclina sinensis and Mactra veneriformis) were exposed to polystyrene microplastic (PS-MP) for 7 days and depurated for 3 days. PS-MP numbers in the digestive system and non digestive system, digestive enzymes, oxidative stress indexes, and a neurotoxicity index of three mollusks were determined at day 0, 3, 7, 8 and 10. After seven-day exposure, the PS-MP were found in all three mollusks' digestive and non-digestive systems. And PS-MP in M. veneriformis (9.57 +/- 2.19 items/individual) was significantly higher than those in C. sinensis (3.00 +/- 2.16 items/individual) and B. exarate (0.83 +/- 1.07 items/individual) at day 7. Threeday depuration could remove most of the PS-MP in the mollusks, and higher PS-MP clearance rates were found in filter-feeding C. sinensis (77.78 %) and M. veneriformis (82.59 %) compared to surface deposit-feeding B. exarate (50.00 %). The digestive enzymes of B. exarate significantly reacted to PS-MP exposure, while oxidative responses were found in C. sinensis. After three-day depuration, the changes of digestive enzymes and the oxidative states were fixed, but neurotoxicity induced by PS-MP was not recoverable. Besides, it is noteworthy that changes of digestive enzymes and acetylcholinesterase are related to feeding patterns.

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