沈兆爽,
张彦峰^,,
祝凌燕
南开大学环境科学与工程学院 环境污染过程与基准教育部重点实验室 天津市生态环境修复与防治重点实验室, 天津 300071

作者简介: 沈兆爽(1990-),女,硕士,研究方向为环境化学,E-mail:szzs1990@163.com.

通讯作者: 张彦峰,zhangyf@nankai.edu.cn ;

基金项目: 国家水体污染控制与治理科技重大专项子课题(2012ZX07501-003-04)


中图分类号: X171.5

The Toxic Effects of Pyrene in Sediments to Misgurnus anguillicaudatus and Limnodrilus hoffmeisteri

Shen Zhaoshuang,
Zhang Yanfeng^,,
Zhu Lingyan
Key Laboratory of Pollution Process and Environmental Criteria of Ministry of Education/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China

Corresponding author: Zhang Yanfeng,zhangyf@nankai.edu.cn ;

CLC number: X171.5

-->

摘要
HTML全文
图(0)表(0)
参考文献(0)
相关文章
施引文献
资源附件(0)
访问统计

摘要:积累在沉积物中的外源化合物会对底栖生物产生危害。本研究以泥鳅(Misgurnus anguillicaudatus)和霍甫水丝蚓(Limnodrilus hoffmeisteri)为受试生物，研究了沉积物中代表性多环芳烃类物质芘(pyrene)对这2种生物的急/慢性毒性效应。芘对泥鳅96 h的半数致死浓度LC₅₀、平衡受损效应浓度EC₁₀和EC₅₀分别为548.9、63.1、254.8 mg·kg^-1干重，21 d的LC₅₀为4.6 mg·kg^-1。沉积物中芘会导致泥鳅活动异常、泥鳅体色加深、抑制泥鳅生长。芘对霍甫水丝蚓28 d的LC₅₀、自断效应浓度EC₁₀和EC₅₀分别为>1 000、5.1、85.4 mg·kg^-1。芘也会抑制霍甫水丝蚓的生长，引起霍甫水丝蚓挖掘深度变浅、挖掘长度变短、挖掘密度变小，导致霍甫水丝蚓产生沉积物回避行为，降低霍甫水丝蚓筑巢密度和大小。霍甫水丝蚓的挖掘、沉积物回避和筑巢等行为产生不同程度的影响。泥鳅对芘的毒害响应较霍甫水丝蚓更加敏感。研究结果丰富了我国本土底栖生物毒性效应数据，为沉积物质量基准的制定奠定了基础。
关键词: 芘/
沉积物/
泥鳅/
霍甫水丝蚓/
毒性效应

Abstract:The xenobiotics accumulating in sediments may pose hazardous effects to benthos. In this study, the acute and chronic toxic effects of pyrene in sediments on Misgurnus anguillicaudatus and Limnodrilus hoffmeisteri were assessed. For Misgurnus anguillicaudatus, the median lethal concentration (LC₅₀), 10% and median effect concentration (EC₁₀, EC₅₀) of unbalance in 96 h experiment were 548.9, 63.1, 254.8 mg·kg^-1, respectively. In 21 d experiment, the LC₅₀ was 4.6 mg·kg^-1. Meanwhile, it showed that pyrene affected the activity, deepened the body color and inhibited the growth of Misgurnus anguillicaudatus. For Limnodrilus hoffmeisteri, in 28 d experiment, the LC₅₀, EC₁₀ and EC₅₀ of autotomy were >1 000, 5.1, 85.4 mg·kg^-1, respectively. Pyrene might also change the behaviors, such as digging, sediment avoidance and nesting, of Limnodrilus hoffmeisteri in different degrees. According to the results, Misgurnus anguillicaudatus is more sensitive than Limnodrilus hoffmeisteri to pyrene in sediments. This paper provides important toxicity data by standard sediment toxicity tests using native benthic organisms in China, which lays the foundation for deriving the sediment quality criteria.
Key words:pyrene/
sediment/
Misgurnus anguillicaudatus/
Limnodrilus hoffmeisteri/
toxic effects.