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岩初级生产减少了来自湖泊沉积物的内部负荷,在光补充下

Miao Zhang¹, Yan Li², Kazi Belal Uddin¹

¹Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China.

Ecotoxicology and environmental safety

|December 15, 2023

概括

暴露于光线减少了水生生态系统的内部释放,通过刺激盆地初级生产. 这一过程降低了的度和流量,改善了浅湖的水质.

科学领域:

环境科学环境科学
水生生态学水生生态学
临界技术临界技术

背景情况:

浅湖的沉积物表面的光线透会影响内部 (P) 的释放.
岩初级生产影响沉积物的氧化,pH值和性酸酶活性.
优性条件加剧了沉积物-水界面上的动态.

研究的目的:

为了研究暴露于光线对光动力学在化的湖泊沉积物的影响.
量化不同光强度对内部释放的影响.
阐明光线影响循环的机制.

主要方法:

一个为期两个月的中宇宙实验,使用1000升的水箱.
来自南湖环氧化的表面沉积物使用LED灯暴露在四种光强度 (0, 50, 100, 200 μmol m−2 s−1) 的光下.
测量包括总度和释放流量.

主要成果:

与对照组相比,光处理显著降低了总度和释放流量.
岩初级生产直接吸收可溶性反应和增加溶解氧,抑制P的释放.
直接吸收和间接抑制分别为23-69%和31-77%的减少P释放,根据光强度而异.

结论:

补充光线可以降低缩水生生生态系统的内部释放.
土初级生产在通过直接吸收和间接氧化来减轻释放方面发挥着双重作用.
照明管理是通过减少内部负荷来控制轻化的一种潜在策略.

关键词:

性酸酶的活性是性的.岩初级生产岩初级生产溶解的氧气是一种溶解的氧气.欧洲化是什么意思?沉积物释放的释放沉积物中的.

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相关概念视频

Primary Production

Primary Production

The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.

The Phosphorus Cycle

The Phosphorus Cycle

Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.