同化过程主导了在浅浅的开放水域建造湿地中的无机循环
Richard L Smith1, Ariel P Reed2, Deborah A Repert1
1U.S. Geological Survey, Boulder, CO 80303, United States of America.
The Science of the total environment
|August 5, 2025
概括
这项研究揭示了建筑湿地中循环的每日波动. 原子活动复杂化了去除,影响了湿地的整体效率.
科学领域:
- 环境科学 环境科学
- 生物地质化学生物地质化学
- 湿地生态学湿地生态学
背景情况:
- 建造的湿地对于净化水是非常有效的.
- 内部碳和循环,以及 diel 功能,需要在单元过程开放水 (UPOW) 系统中进行进一步的研究.
研究的目的:
- 为了研究水柱和生物质地化学中的diel (24小时) 波动.
- 了解UPOW建造湿地的实地规模 (N) 循环过程.
主要方法:
- 现场测量溶解的氧气,酸盐和的度.
- 在现场以15N标记的化物化,以量化N转化速率.
- 开发和应用一个时间步骤N的过程模型.
主要成果:
- 观察到溶解氧 (50-250%空气和度) 和N种度的每日波动.
- 酸盐和含量表现出明显的日间模式,与N同位素值有反向关系.
- 白天的酸盐生产和脱率显著降低,而夜晚的anammox和异型酸盐降解为 (DNRA) 显著降低.
结论:
- 的光同化显著超过了不相似的去除率.
- 在现场的脱和DNRA率高于在化过程中测量的.
- 氧化还原梯度,藻迁移和藻DNRA呼吸使藻N循环复杂化,并通过干扰气去除来降低湿地有效性.
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