The Toxicity of Copper to Pacific Oyster and Sea Squirt from Japan Using Regional Seawater as a Test Medium

Q3 Environmental Science

Journal of Water and Environment Technology Pub Date : 2022-01-01 DOI:10.2965/jwet.22-046

R. Tai, Kenta Chiba, Y. Nishimura, Shuping Han, S. Masunaga, W. Naito

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引用次数: 0

Abstract

Copper (Cu) toxicity is an increasing concern in marine environments; however, its effects are spe cies- and area-specific. In this study, area-specific Cu toxicity test was conducted on the sensitive early life stages ( i.e. , embryonic and larval development) of two important fisheries species, namely, Pacific oyster ( Crassostrea gigas ) and sea squirt ( Halocynthia roretzi ) using natural sea waters collected from three sites in the coastal area of Miyagi Prefecture, Japan. Measured concentrations for C. gigas and nominal concentrations for H. roretzi were used to calculate effect concentrations for each species. The 10% effect concentration (EC10) for Cu were 12.8–17.0 and 15.0–22.0 µg L −1 , and 50% effect concentration (EC50) for Cu were 20.3–22.6 and 45.6–47.2 µg L −1 , respectively. Notably, this study is the first to determine the toxicity of Cu to H. roretzi, and our results can provide additional information to strengthen the Cu species sensitivity distribution of saltwater species, which can support bioavailability correction. Moreover, the results of this study can help policymakers to develop more realistic Cu water quality standard while considering the effects of Cu toxicity on important species and the water chemistry in specific regions. (c)

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以区域海水为试验介质研究铜对日本太平洋牡蛎和海鞘的毒性

铜(Cu)毒性在海洋环境中日益受到关注;然而，它的影响是特定物种和地区的。本研究利用日本宫城县沿海3个地点采集的自然海水，对两种重要渔业物种太平洋牡蛎(Crassostrea gigas)和海鞘(Halocynthia roretzi)敏感的早期生命阶段(即胚胎和幼体发育)进行了区域特异性铜毒性试验。利用测量的巨线虫浓度和罗氏螺旋体的名义浓度来计算每种物种的效应浓度。铜的10%效应浓度(EC10)分别为12.8 ~ 17.0和15.0 ~ 22.0µg L−1，铜的50%效应浓度(EC50)分别为20.3 ~ 22.6和45.6 ~ 47.2µg L−1。值得注意的是，本研究首次确定了铜对H. roretzi的毒性，为加强咸水物种对铜的敏感性分布提供了额外的信息，为生物利用度校正提供了支持。此外，本研究结果可以帮助决策者在考虑Cu毒性对重要物种的影响和特定区域水化学的同时制定更现实的Cu水质标准。(c)

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Water and Environment Technology Environmental Science-Water Science and Technology

CiteScore

1.80

自引率

0.00%

发文量

审稿时长

43 weeks

期刊介绍： The Journal of Water and Environment Technology is an Open Access, fully peer-reviewed international journal for all aspects of the science, technology and management of water and the environment. The journal’s articles are clearly placed in a broader context to be relevant and interesting to our global audience of researchers, engineers, water technologists, and policy makers. JWET is the official journal of the Japan Society on Water Environment (JSWE) published in English, and welcomes submissions that take basic, applied or modeling approaches to the interesting issues facing the field. Topics can include, but are not limited to: water environment, soil and groundwater, drinking water, biological treatment, physicochemical treatment, sludge and solid waste, toxicity, public health and risk assessment, test and analytical methods, environmental education and other issues. JWET also welcomes seminal studies that help lay the foundations for future research in the field. JWET is committed to an ethical, fair and rapid peer-review process. It is published six times per year. It has two article types: Original Articles and Review Articles.