菌有机物 (COM) 的积极反通过改变沉积物的释放特征,加剧了湖泊的肥壮化
Jinglong Wang1, Qinyi Chen1, Shun Huang1
1Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
The Science of the total environment
|June 3, 2023
概括
湖泊沉积物中的菌有机物改变了的释放,在低水平稳定了可溶性反应 (SRP). 这有利于蓝藻细菌,加剧了湖泊环氧化,并为风险评估提供了洞察力.
科学领域:
- 环境科学 环境科学
- 临界技术 临界技术
- 生物地质化学生物地质化学
背景情况:
- 缩是一种主要的环境问题,由营养丰富,特别是驱动.
- 溶性反应 (SRP) 和沉积物属性在湖泊生态系统中至关重要.
- 蓝藻细菌的开花是优食性湖泊的一个标志.
研究的目的:
- 调查湖泊沉积物中优化和动态之间的关系.
- 为了测试蓝菌有机物 (COM) 影响沉积物释放的假设.
- 了解沉积物特性如何影响藻类竞争和优化.
主要方法:
- 现场采样和分析11个环氧化的湖泊.
- 在SRP,优化参数 (Chl-a,TP) 和沉积物特性 (EPC0) 之间的相关性分析.
- 实验室模拟实验将有机物质 (OM) 添加到沉积物中,以评估吸附和释放.
主要成果:
- 随着越来越多的轻化,SRP和沉积物EPC0下降.
- COM显著减少了沉积物EPC0和增加了释放率 (PRRS).
- COM提高了SRP吸附能力 (Qmax),并在低度下促进了更快的SRP释放,有利于菌.
结论:
- 在沉积物中积累的COM会产生一个积极的反循环,增强湖泊的肥胖化.
- 沉积物释放的特征对于理解藻类竞争和花形成至关重要.
- 这些发现为湖泊缩风险评估和管理策略提供了基础.
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