溶解有机碳
环境化学
化学
铜
湿地
碳循环
有机质
荧光
水生生态系统
猝灭(荧光)
碳纤维
环境科学
生态系统
生态学
材料科学
有机化学
生物
物理
量子力学
复合数
复合材料
作者
Hualong Hong,Shengjie Wu,Qiang Wang,Minyue Dai,Qian Lu,Heng Zhu,Junwei Li,Jie Zhang,Jingchun Liu,Jian Li,Haoliang Lu,Chongling Yan
标识
DOI:10.1016/j.scitotenv.2021.147855
摘要
Dissolved organic matter (DOM) is a crucial driver in ecosystem services and a central part of the carbon transport and biological cycle in land-sea interaction. DOM exhibits characteristic environmental behavior in the coastal zone, but its sustainability is affected by expanding artificial topography (AT) construction. It requires combining analyses on AT-induced response of field fluorescent DOM (fDOM) and its quenching pattern under metal-complexation. Herein, we conducted systemic investigations into the spatiotemporal dynamics of fDOM compositions with further in-lab verification to study its Cu-binding capacity. We detected three humid-like fDOM components sensitive to AT. The total fDOM intensity was positively correlated with low molecular weight organic acid (LMWOA) extractable Cu and the Cu pools in above-ground biomass. The enriched fDOM serves as an ecological engineer by increasing the Cu mobility, confirmed by an in-lab fluorescence titration. The application of LMWOA greatly enhanced the intensity of one fDOM component, elevated its conditional stability constant, and decreased its quenched proportion, implying that LMWOA might extract part of Cu from fDOM complexation. The present work provides an “fDOM-LMWOA pump” explanation to suggest that fDOM is a novel ecological regulator on vegetation growth under the AT-induced matter accumulation.
科研通智能强力驱动
Strongly Powered by AbleSci AI