Microcystis aeruginosa aggravated arsenic accumulation in silver carp during silver carp controlling algal bloom in arsenic-contaminated water  

作　　者：Xinxin Zhao Zuoming Xie Taikun Liu Zuoping Zhao Fengmin Song Zhifeng Liu 

机构地区：[1]State Key Laboratory of Qinba Bio-Resource and Ecological Environment,School of Chemistry&Environment Science,Shaanxi University of Technology,Hanzhong 723001,China [2]State Key Laboratory of Biogeology and Environmental Geology&School of Environmental Studies,China University of Geosciences,Wuhan 430074,China [3]Linyi Vocational University of Science and Technology,Linyi 276000,China

出　　处：《Journal of Environmental Sciences》2024年第12期81-90,共10页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.41572230 and 41172219);the Grant for Innovative Research Groups of the National Natural Sci-ence Foundation of China(No.41521001);the Special Scien-tific Research Project of Hanzhong City-Shaanxi University of Technology Co-construction State Key Laboratory(No.SXJ-2106);the Scientific Research Foundation of State Key Laboratory of Qinba Bio-Resource and Ecological Environment(No.SXC-2105).

摘　　要：Silver carp mediated biological control techniques are often advocated for controlling cyanobacteria blooms in eutrophic water,which are often enriched with arsenic(As).How-ever,the transfer and fate of As during the biological control of cyanobacteria blooms by silver carp in As-rich eutrophic water remain unclear.Based on the simulated ecosystem experiment,the accumulation of As in silver carp and the transfer and fate of As in the water-algae-silver carp system during Microcystis aeruginosa blooms controlled by silver carp were investigated.Microcystis aeruginosa showed high tolerance to As(V).The accumulation of As in different tissues of silver carp was different,as follows:intestine>liver>gill>skin>muscle.After silver carp ingested As-rich Microcystis aeruginosa,As accumulation in the intestine,liver,gill,and skin of silver carp was enhanced under the action of digestion and skin contact.Compared with the system without algal,As accumulation in the intestine,liver,gill,and skin of silver carp increased by 1.1,3.3,3.3,and 9.6 times,respectively,after incubation for 30 days in the system with Microcystis aeruginosa,while the accumulation of As in the muscle was only slightly increased by 0.56 mg/kg.This work revealed the transfer and fate of As during algal control by silver carp,elucidated the accumulation mechanism of As in water-algae-silver carp system,enriched our understanding of As bioaccumulation and transformation in As-rich eutrophication water,and provided a scientific basis for as-sessing and predicting As migration and enrichment in water-algae-silver carp system.

关 键 词：Microcystis aeruginosa bloom Silver carp Biological control Arsenic transfer BIOACCUMULATION 

分 类 号：X52[环境科学与工程—环境工程]