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首页> 外文期刊>Marine Chemistry >Source characterization of dissolved organic matter in a subtropical mangrove-dominated estuary by fluorescence analysis
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Source characterization of dissolved organic matter in a subtropical mangrove-dominated estuary by fluorescence analysis

机译：通过荧光分析表征亚热带红树林为主河口中溶解有机物的来源

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摘要

Measurements of dissolved organic carbon (DOC), UV-visible, fixed wavelength fluorescence, and synchronous fluorescence were performed in an effort to characterize spatial and temporal variability in concentration and source of dissolved organic matter (DOM) in surface waters of the southwest coast of Florida. Concentrations of DOC in the surface water ranged from 318 to 2043 M and decreased from the upper estuary to the coastal areas, and were not only influenced by source strength but also by the hydrology and geomorphology of the mangrove-dominated southwest Florida estuarine area of Everglades National Park. Mangroves provided a significant input of DOM to the estuarine region. This terrestrially derived DOM underwent conservative mixing in these estuaries, but at salinities ≥ 30 a clear switch from terrestrial to marine DOM was observed indicating a change in the nature and origin of the dominant DOM. The results show that the dynamics of DOM in these subtropical estuaries are complex and that geomorphologically compartmentalized estuarine subregions can be distinguished based on the optical characteristics of their DOM.
机译：测量溶解有机碳（DOC），紫外可见光，固定波长荧光和同步荧光的方法是为了表征西南沿海地表水中溶解有机物（DOM）的浓度和来源的时空变化。佛罗里达。地表水中的DOC浓度范围为318至2043 M，并且从上河口到沿海地区下降，不仅受水源强度的影响，而且还受到以红树林为主的西南佛罗里达大沼泽地的水文和地貌的影响国家公园。红树林为河口地区提供了重要的DOM投入。在这些河口，这种陆生的DOM进行了保守混合，但是在盐度≥30时，观察到从陆地DOM到海洋DOM的明确转换，表明主要DOM的性质和起源发生了变化。结果表明，这些亚热带河口中DOM的动力学非常复杂，并且可以根据其DOM的光学特征来区分地貌分隔的河口子区域。

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