[Change of humic-like fluorescence characteristics of dissolved organic matter from Dagu River to Jiaozhou Bay].
Fluorescence excitation-emission matrix spectroscopy was employed to characterize the change of humic-like fluorescence from Dagu River to Jiaozhou Bay. The relationships of humic-like fluorescence characteristics with salinity, pH, chlorophyll a, dissolved organic carbon, chemical oxygen demand and carbohydrate were discussed. The results show that humic-like fluorescence intensities are high in Dagu River but low in Jiaozhou Bay. The input of Dagu River is important origin of humic-like fluorescent dissolved organic matter of Jiaozhou Bay. High humic-like fluorescence intensity and high chlorophyll a are not coexist always, which suggests that humic-like fluorescent dissolved organic matter doesn't mainly come from phytoplankton. Good relationships of humic-like fluorescence intensity with dissolved organic carbon, chemical organic demand and carbohydrate suggest that humic-like fluorescent matter is the main component of dissolved organic matter. The distribution of humic-like fluorescence reflects the distribution of dissolved organic matter to some extents.
Ji
Nai-yun
NY
Key Laboratory of Marine Ecology & Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China. jinaiyun@qingdaonews.com
Zhao
Wei-hong
WH
Wang
Jiang-tao
JT
Miao
Hui
H
D002681:China; D005068:Eutrophication; D006812:Humic Substances / Q000032:analysis*; D009930:Organic Chemicals / Q000032:analysis*; D045483:Rivers / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods; D014874:Water Pollutants, Chemical / Q000032:analysis*
D006812:Humic Substances; D009930:Organic Chemicals; D014874:Water Pollutants, Chemical