在地下河口漏面上的循环:对库存组成的季节性观点以及与酸盐转换的联系
Danqing Sun1, Juan Severino Pino Ibánhez2, Jing Zhang3
1State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China.
The Science of the total environment
|March 8, 2024
概括
地下河口显著影响和循环,季节性变化影响营养水平. 这些系统为沿海水域提供大量的可溶,影响营养平衡.
科学领域:
- 海洋化学 海洋化学
- 生物地质化学生物地质化学
- 沿海生态 沿海生态
背景情况:
- 地下河口是陆地和海洋之间营养物质交换的关键接口.
- 了解STEs中的 (P) 和 (N) 循环对于沿海水质至关重要.
- 在STEs中P和N的季节性动态和生物地化学联系仍然不完全理解.
研究的目的:
- 为了研究 (P) 在地下河口 (STE) 漏面的运输和反应性.
- 在排放之前探索和 (N) 循环之间的生物地化学联系.
- 分析P分数的季节和空间变化及其与N转换的关系.
主要方法:
- 季节性实地调查在中国的桑戈湾进行了一年多.
- 对孔水中溶解的无机 (DIP) 和溶解的有机 (DOP) 的分析.
- 在不同深度和潮间区域的不同沉积物P分量的表征.
主要成果:
- 沉积物有机P积累刺激了微生物活动,并在春天增加了孔水DOP.
- 由于矿物化增加,总P,DIP和DOP度在夏季下降.
- 沉积物P储存显示了整个潮区的空间均性,但具有显著的季节性变化.
- 垂直P分布与酸盐转化有关,化区的DOP和粘土P增加,酸盐去除区的DIP/DOP减少.
- 观察到大量可溶性P透到接收水域.
结论:
- STEs表现出复杂的季节性P和N循环,影响沿海水域的营养负载.
- 沉积物P的空间均性是通过吸附动态和有机物输入来维持的.
- 酸盐转化在调节 STE 沉积物中的 P 分布方面发挥着关键作用.
- 高度的N和P在STEs中的重叠引发了营养出口的变化,影响了沿海石化学,并需要研究人员和利益相关者的注意.
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