银鲤鱼介导的生物控制技术通常被提倡用于控制富营养化水体中的蓝藻水华,通常富含砷(As)。然而,在富含砷的富营养化水中,鲤鱼对蓝藻水华的生物控制过程中砷的转移和命运仍不清楚。基于模拟生态系统实验,研究了由silp控制的铜绿微囊藻水华期间,silp中As的积累以及水藻-silver系统中As的转移和命运。铜绿微囊藻对As(V)表现出较高的耐受性。鲤鱼不同组织中As的积累量不同,如下:肠>肝>刺>皮肤>肌肉。鲤鱼摄入富含砷的铜绿微囊藻之后,作为在肠道中的积累,肝脏,吉尔,在消化和皮肤接触的作用下,鲤鱼的皮肤得到增强。与无藻系统相比,作为在肠道中的积累,肝脏,吉尔,银鲤鱼的皮肤增加了1.1、3.3、3.3和9.6倍,分别,在铜绿微囊藻系统中孵育30天后,而肌肉中As的积累仅略微增加0.56mg/kg。这项工作揭示了鲤鱼在藻类控制过程中As的转移和命运,阐明了砷在水-藻-银鲤鱼系统中的积累机理,丰富了我们对富含砷的富营养化水中生物累积和转化的理解,为评估和预测As在水-藻-鲤鱼系统中的迁移和富集提供了科学依据。
Silver carp mediated biological control techniques are often advocated for controlling cyanobacteria blooms in eutrophic water, which are often enriched with arsenic (As). However, 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 assessing and predicting As migration and enrichment in water-algae-silver carp system.