title: [Change of humic-like fluorescence characteristics of dissolved organic matter from Dagu River to Jiaozhou Bay].
abstract: 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.
authors.affiliation: Key Laboratory of Marine Ecology & Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China. jinaiyun@qingdaonews.com
authors.forename: Nai-yun
authors.initials: NY
authors.lastname: Ji
authors.forename: Wei-hong
authors.initials: WH
authors.lastname: Zhao
authors.forename: Jiang-tao
authors.initials: JT
authors.lastname: Wang
authors.forename: Hui
authors.initials: H
authors.lastname: Miao
mesh_terms: 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*
chemical_list: D006812:Humic Substances; D009930:Organic Chemicals; D014874:Water Pollutants, Chemical