在萨克拉门托深水船舶运河污染的基线评估
Cristina G B La1, Kara E Huff Hartz1, Mia Arkles1
1Center for Fisheries, Aquaculture and Aquatic Sciences, School of Biological Sciences, Southern Illinois University, Carbondale, IL, 62901, USA.
Environmental pollution (Barking, Essex : 1987)
|July 25, 2024
概括
萨克拉门托深水航道中的污染物对鱼类构成风险. 发现了可生物利用的有机农药和多环芳,其中一些超过安全水平,特别是在悬浮固体和动物浮游生物中.
科学领域:
- 环境化学环境化学
- 生态毒理学 生态毒理学
- 水生生态学 水生生态学
背景情况:
- 萨克拉门托深水船道 (SDWSC) 是海底鱼类的重要息地.
- 鱼生物的减少与息地变化,入侵物种,食物减少和污染物有关.
- 尽管检测到沉积物污染,但SDWSC中生物可用毒素的数据有限.
研究的目的:
- 在SDWSC中描述污染物的生物可用性.
- 在沉积物,动物浮游生物和悬浮固体中量化有机农药 (OCP),铁类杀虫剂,多芳香碳化合物 (PAH) 和多双 (PCB).
- 评估与沉积物相关的污染物的生物可访问部分.
主要方法:
- 在SDWSC沿线的六个地点采样.
- 在沉积物,动物浮游生物和悬浮固体中量化OCP,铁,PAH和PCB.
- 提取tenax以确定与沉积物相关的污染物的生物可访问分数.
主要成果:
- 在所有地点都发现了可生物利用的OCP,特别是4,4'-二二二乙烯 (DDE).
- 在所有地点检测到可生物利用的PAHs,其中氨酸和烯是最常见的.
- 沉积物中没有PCB,但在悬浮固体和动物浮游生物中存在.
- 悬浮固体中的污染物度最高,其次是动物浮游生物和沉积物.
- 沉积物中DDE,,烯和二[a,h]烯的度超过了基准值.
- 在悬浮固体和动物浮游生物中发现了高水平的污染物.
结论:
- 在SDWSC中的生物可访问污染物为水生生物体提供了吸收途径.
- 一些与沉积物相关的污染物超过了质量基准,对盆地物种构成风险.
- 悬浮固体和动物浮游生物中的高污染物水平表明,SDWSC中的海物种存在风险.
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