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长期污染decabromodiphenyl以太降低沉积物的多功能性:从营养循环,微生物生态集群和微生物共发生模式的洞察力

Han Gao¹, Juan Chen¹, Chao Wang¹

¹Key Laboratory of Integrated Regulation and Resource Department on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, PR China.

Journal of hazardous materials

|September 12, 2024

概括

脱二乙烯 (BDE-209) 污染会通过改变营养循环和微生物群落而损害沉积物功能. 长期暴露会减少沉积物的整体多功能性,影响水生生态系统.

科学领域:

环境化学环境化学
生态毒理学生态毒理学
微生物生态学微生物生态学

背景情况:

聚二乙烯 (PBDE) 是水生环境中普遍存在的污染物.
长期影响PBDE,特别是甲二乙烯 (BDE-209) 的沉积物功能的影响尚不清楚.

研究的目的:

为了研究BDE-209对沉积物多功能性的360天的影响.
分析BDE-209对碳,,和硫循环的影响.
了解微生物群落在调解这些影响中的作用.

主要方法:

一个为期360天的微观实验,BDE-209的度不同 (0.2,2,20 mg/kg干重).
营养度 (C,N,P,S) 和关键酶活动的分析.
评估细菌群体结构及其与营养动态的相关性.

主要成果:

BDE-209增加了总有机碳,酸盐,,可用的和硫化物,同时减少了硫酸盐.
观察到酶活动的改变和微生物群落不相似性的显著变化.
抑制C降解和N通路,但增强C固定,甲生成,P矿化,P溶解和硫酸盐减少.

结论:

污染BDE-209通过破坏营养循环和改变微生物群落,显著降低沉积物的多功能性.
微生物网络的复杂性和多样性是影响BDE-209压力下的多功能性的关键因素.
碳和循环在确定沉积物的多功能性方面比和硫循环在受污染的沉积物中发挥更为关键的作用.

关键词:

甲基二乙烯乙醇是什么?功能性基因是指功能性的基因.功能性微生物功能性微生物营养素循环的循环.沉积物多功能性的沉积物

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