蓝色碳在各种河口的动态:关键驱动因素和途径
Sha Lou1, Zhongyuan Yang2, Shizhe Chen3
1Department of Hydraulic Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China; Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China; State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China.
Water research
|October 5, 2025
概括
沿海湿地是重要的有机碳 (OC) 沉. 人类活动和当地因素显著影响OC动态和河口热带状况,影响蓝色碳的储存.
科学领域:
- 河口生态学 河口生态学
- 生物地质化学生物地质化学
- 碳循环是碳循环的过程.
背景情况:
- 沿海湿地是有机碳 (OC) 的重要吸收点.
- 了解OC动态对于评估河口健康和碳捕获至关重要.
- 人类影响在不同的河口系统中各不相同,影响生态系统过程.
研究的目的:
- 检查不同河口的有机碳 (OC) 动态和热量状态.
- 确定OC组成,降解和埋葬效率的关键驱动因素.
- 评估人类活动对河口碳循环和环保化的影响.
主要方法:
- 稳定同位素追踪 (δ13C,C/N) 用于确定OC来源.
- 机器学习 (BRT模型) 和部分最小平方路径建模 (PLS-PM) 来识别关键驱动因素.
- 用于优化评价的热带指数 (TRIX,STI).
主要成果:
- 陆地来源贡献了80%以上的OC,河口的组成各不相同 (例如,YRE与RBNERR).
- 人为的有机物输入和植物浮游生物的生长增强了降解,可能减少受影响河口 (YRE,BWE,HCE) 的碳埋葬.
- 像YRE和BWE这样的河口被发现是顺的,而其他则是中的,由不同的OC来源和降解途径驱动.
结论:
- 当地环境因素和人类活动是沿海湿地的OC动态的主要驱动因素.
- 了解OC循环的特定机制对于准确的蓝色碳评估至关重要.
- 河口热带状况与OC来源,降解过程和人为压力直接相关.
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