溶解无机碳动态对沿海湿地模拟的潮水文过程的反应
Jimin Yu1, Xiaotong Wang1, Mengyan Liu1
1College of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, China; Carbon Neutrality and Eco-Environmental Technology Innovation Center of Qingdao, Qingdao, 266071, China.
Journal of environmental management
|July 11, 2024
概括
沿海湿地的潮变化显著增加了水中溶解的无机碳 (DIC). 这些变化促进土壤DIC积累和无机碳溶解,影响海平面上升下的蓝色碳循环.
科学领域:
- 环境科学 环境科学
- 海洋生物学 海洋生物学
- 地质化学 地质化学
背景情况:
- 海平面上升改变了沿海湿地的水文,影响了蓝色碳循环.
- 了解溶解无机碳 (DIC) 动态的转变对于沿海碳捕获研究至关重要.
研究的目的:
- 调查潮变化的水文过程对沿海湿地的土壤-水溶解无机碳 (DIC) 动态的影响.
- 为了澄清海平面上升引起的水文变化对蓝色碳循环的影响.
主要方法:
- 使用来自Suaeda salsa (SS) 和Phragmites australis (PA) 湿地的土壤模拟的潮水学过程 (Neap,中,春潮).
- 随着时间的推移,监测水中溶解无机碳 (WDIC) 度和土壤DIC和土壤无机碳 (SIC) 含量.
- 分析了DIC积累,SIC,土壤营养和微生物生物质之间的关系,区分了无生物和生物过程.
主要成果:
- 在研究初期,WDIC度显著增加 (115%),中潮度高于春季和尼普潮.
- 土壤DIC含量显示净积累,而土壤无机碳 (SIC) 减少,表明SIC溶解形成DIC.
- 无生物过程 (58.182.7%) 主导着DIC积累,这与SIC直接相关,间接与土壤营养素和微生物有关.
- 增加的潮频率抑制了土壤DIC积累,并促进了WDIC输出,反应因湿地类型而异.
结论:
- 潮的水文过程转移重塑了DIC的动态,促进了SIC溶解和沿海湿地潜在的CO2吸收.
- 这些发现有助于更好地了解面临气候变化和海平面上升的沿海生态系统中的无机碳循环.
- 土壤营养素和SIC含量之间的相互作用是调节湿地DIC对潮频率变化的反应的关键.
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