Extreme cold or warm events can potentially exacerbate chemical toxicity to the marine medaka fish Oryzias melastigma

doi:10.1016/j.aquatox.2022.106226

GIG OpenIR

	Li, Adela J.1,2,3; Zhou, Guang-Jie 4,5; Lai, Racliffe W. S.4,5; Leung, Priscilla T. Y.4,5; Wu, Chen C.6; Zeng, Eddy Y.6,7; Lui, Gilbert C. S.8; Leung, Kenneth M. Y.4,5
	Extreme cold or warm events can potentially exacerbate chemical toxicity to the marine medaka fish Oryzias melastigma
刊名	AQUATIC TOXICOLOGY
ISSN号	0166-445X
	2022-08-01
卷号	249 页码:10
DOI	10.1016/j.aquatox.2022.106226
语种	英语
WOS研究方向	Marine & Freshwater Biology ; Toxicology
摘要	Marine ecosystems are currently subjected to dual stresses of chemical pollution and climate change. Through a series of laboratory experiments, this study investigated the impact of exposure to chemical contaminant such as DDT or copper (Cu), in combination with cold or warm temperature extremes on the marine medaka fish Oryzias melastigma. The results showed that extreme seawater temperatures (i.e., 15 and 32 degrees C in sub-tropical Hong Kong) exacerbated adverse chemical impacts on the growth performance of O. melastigma, in particular at the high thermal extreme. This was likely associated with an interruption of oxygen consumption and aerobic scope. Most importantly, the results of acclimation experiments, as reflected by thermal tolerance polygons, showed that chemical exposure substantially narrowed the thermal tolerance of the medaka, making them more vulnerable to temperature changes and extreme thermal events. Under dual stresses of thermal extremes and chemical exposure, the medaka switched their metabolic pathway to anaerobic respiration that might deplete their energy reserve for chemical detoxification. Although stress proteins such as heat shock proteins (HSP90) were up-regulated for cellular protection in the fish, such a defensive mechanism was repressed with intensifying dual stresses at high temperature and high chemical concentration. Bioconcentration of DDT or Cu generally increased with increasing temperature and its exposure concentration. Overall, these complex chemical-temperature interactions concomitantly exerted a concerted adverse impact to O. melastigma. The temperature-dependent toxicity of DDT or Cu shown in this study clearly demonstrated the potential challenge brought by the risk of chemical pollution under the impact of global climate change.
关键词	Thermal extremes Metal Insecticide Marine medaka Toxic mechanism
WOS记录号	WOS:000817878100004
收录类别	SCI
引用统计
文献类型	期刊论文
条目标识符	http://ir.gig.ac.cn/handle/344008/68225
通讯作者	Zhou, Guang-Jie; Leung, Kenneth M. Y.
作者单位	1.Univ Hong Kong, Swire Inst Marine Sci, Pokfulam, Hong Kong, Peoples R China 2.Univ Hong Kong, Sch Biol Sci, Pokfulam, Hong Kong, Peoples R China 3.South China Agr Univ, Colleage Nat Resources & Environm, Guangzhou, Peoples R China 4.City Univ Hong Kong, State Key Lab Marine Pollut, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China 5.City Univ Hong Kong, Dept Chem, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China 6.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou, Peoples R China 7.Jinan Univ, Sch Environm, Guangzhou, Peoples R China 8.Univ Hong Kong, Dept Stat & Actuarial Sci, Pokfulam, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Li, Adela J.,Zhou, Guang-Jie,Lai, Racliffe W. S.,et al. Extreme cold or warm events can potentially exacerbate chemical toxicity to the marine medaka fish Oryzias melastigma[J]. AQUATIC TOXICOLOGY,2022,249:10.
APA	Li, Adela J..,Zhou, Guang-Jie.,Lai, Racliffe W. S..,Leung, Priscilla T. Y..,Wu, Chen C..,...&Leung, Kenneth M. Y..(2022).Extreme cold or warm events can potentially exacerbate chemical toxicity to the marine medaka fish Oryzias melastigma.AQUATIC TOXICOLOGY,249,10.
MLA	Li, Adela J.,et al."Extreme cold or warm events can potentially exacerbate chemical toxicity to the marine medaka fish Oryzias melastigma".AQUATIC TOXICOLOGY 249(2022):10.