溶解有机物动态对潮河口洪水事件的反应
Kai Wang1, Fengyi Zhang2, Dan Wang3
1Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin, China.
Journal of environmental management
|September 9, 2025
概括
洪水事件显著改变河口中的溶解有机物 (DOM),增加陆地输入和反抗性碳. 这影响了沿海生态系统和从陆地到海的碳运输.
科学领域:
- 环境科学 环境科学
- 生物地质化学生物地质化学
- 生态生态学 生态生态学
背景情况:
- 潮河口对于连接陆地和海洋生态系统至关重要.
- 气候变化加剧了洪水事件,使得河口中的溶解有机物 (DOM) 循环复杂化.
- 了解洪水期间的DOM动态对于沿海生态系统健康至关重要.
研究的目的:
- 为了研究洪水事件对潮河口的DOM动态的影响.
- 描述受洪水条件影响的DOM中的化学变化.
- 评估洪水引起的DOM变化对碳循环的更广泛影响.
主要方法:
- 在正常和洪水期间对水文和生物地质化学参数进行现场监测.
- 溶解有机物 (DOM) 组成的分子分析.
- 河口数据与全球洪水信息的整合.
主要成果:
- 洪水事件改变了DOM化学,降低了盐度和pH值,同时增加了营养素和叶绿素a.
- 在洪水期间,溶解有机碳 (DOC) 和总溶解 (TDN) 度较高.
- DOM分析显示,洪水后陆地投入增加,芳香度更高,生物降解性降低.
结论:
- 洪水事件显著影响DOM动态和河口碳循环.
- 洪水增强了从陆地到河流和沿海生态系统的反抗性碳的运输.
- 这些发现对沿海生态系统在气候变化中的弹性有影响.
更多相关视频
07:59A Strain Gauge Monitor SGM for Continuous Valve Gape Measurements in Bivalve Molluscs in Response to Laboratory Induced Diel-cycling Hypoxia and pH
Published on: August 1, 2018
9.4K
06:42Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment
Published on: July 22, 2019
7.0K
相关概念视频
02:41Responses to Drought and Flooding
11.9K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
11.9K
01:06Primary Production
25.1K
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.
25.1K
01:20Types of Damping
7.5K
If the amount of damping in a system is gradually increased, the period and frequency start to become affected because damping opposes, and hence slows, the back and forth motion (the net force is smaller in both directions). If there is a very large amount of damping, the system does not even oscillate; instead, it slowly moves toward equilibrium. In brief, an overdamped system moves slowly towards equilibrium, whereas an underdamped system moves quickly to equilibrium but will oscillate about...
7.5K
00:54What are Biogeochemical Cycles?
39.1K
The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.
39.1K