波罗的海湖中的酸盐:空间分布,生态风险,以及利用转录学对其命运的新见解
Elise Lorre1, Federica Bianchi2, Elias Broman3
1Marine Research Institute, Klaipeda University, 92295 Klaipeda, Lithuania.
The Science of the total environment
|November 16, 2024
概括
酸盐 (PAE) 是波罗的海湖中普遍存在的污染物. 微生物群落,特别是沉积物中的格拉姆阴性细菌,积极降解PAE,为河口环境风险和补救提供了洞察力.
科学领域:
- 环境化学环境化学
- 环境微生物学 环境微生物学
- 生态毒理学 生态毒理学
背景情况:
- 酸盐 (PAE) 是一种普遍存在的有机污染物,由于它们的广泛使用和潜在的不良影响,引起了严重的环境问题.
- 湖生态系统以半封闭的自然和高的有机负载为特征,特别容易受到PAE污染.
- 了解PAE的分布和命运对于评估脆弱沿海环境中的生态风险至关重要.
研究的目的:
- 调查七种常见的PAE在波罗的海南部三个欧洲湖的水柱和沉积物中的分布.
- 确定最关心的PAE类原体,并评估它们对水生生物的潜在生态风险.
- 揭示涉及PAE降解的微生物群落,并阐明这些河口生态系统中的转化途径.
主要方法:
- 从库尔尼亚,维斯拉和斯切辛湖取水和沉积物样本.
- 使用分析化学技术量化七种常见的PAE.
- 在实地样本中对微生物群落的枪式转录组分析.
主要成果:
- 水中的PAE总度在0.03至1.45μg L-1之间,沉积物中的PAE总度在0.008至1.06μg g-1之间,与其他欧洲沿海地区相比.
- 鉴定出二甲基甲酸 (DEHP),二甲基甲酸 (DOP) 和二甲基甲酸 (DMP) 是最常见的PAE,具有中等风险.
- 发现活跃的微生物群落,主要是沉积物中的克拉姆阴性细菌,会降解PAE,而酸降解不是限制速度的步骤.
结论:
- PAE分布模式在沉积物中表现出相似之处,但在研究的湖中水柱的变化.
- 特定的PAE同源 (DEHP,DOP,DMP) 对这些波罗的海湖中的水生生物构成中等的生态风险.
- 这项研究提供了波罗的海湖中的微生物群体对PAE活跃降解的首个证据,突出了沉积物相关的格拉姆阴性细菌的作用.
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