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在一条河流中溶解和颗粒的周转占主导地位,边缘海由宇宙源P和P33追踪

Cheng Xu¹, Bin Yang², Jinlong Wang³

¹Key Laboratory of Coastal Salt Marsh Ecosystems and Resources, Ministry of Natural Resources/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, 222005, China; State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, 200241, China.

|December 24, 2025

概括

的周转率,而不仅仅是度,是沿海生态系统健康的关键. 春季和近海水域的更快的周转率提高了生产率,但增加了藻类开花的风险.

科学领域:

环境化学环境化学
海洋生态海洋生态学
生物地质化学生物地质化学

背景情况:

河口和沿海环境经常面临过度的输入和 (P) 限制.
的周转率极大地调节了这些系统中的生态动态.
了解P循环对于管理沿海缩至关重要.

研究的目的:

为了估计使用宇宙放射性同位素P和P的周转时间,P.
调查长江河口 (CJE) 和东中国海P周转的时空变化.
阐明P周转在沿海生态动态和优化中的作用.

主要方法:

在溶解和颗粒P池中测量自然宇宙性放射性同位素32P和33P.
分析P/P活动比率以确定P的周转时间.
在2021年秋季和2022年春季期间,在CJE和相邻的东海进行采样.

主要成果:

大气中的湿沉积显著影响了P和P的分布.
颗粒P中的P比较高,并且随着颗粒大小的增加而增加,表明P从溶解到颗粒相的转移.
溶解P的停留时间从4.6到13.7天不等,在春季/近岸水域较短;颗粒P的停留时间为5.314.4天,除了的河口区域.

结论:

春季和近海水域的快速溶解P周转促进了营养物质的循环利用,并支持了初级生产力.
高的P周转率,特别是在P限制条件下,可能会加剧藻类繁殖的风险.
的周转率是沿海环保的关键调节者,为生态管理提供了关键的见解.

关键词:

(32) 没有P.(33) P33) P33) P33) P33) P33) P33) P33) P33) P33) P33) P33) P33) P33) P33)长江河口的长江河口溶解的和颗粒物的.营业额的增长率是多少

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相关概念视频

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.

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.