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dc.contributor.authorGuo Dong-hui
dc.contributor.author郭东晖
dc.contributor.authorYi Yue-yuan
dc.contributor.authorZhao Lei
dc.contributor.authorGuo Wei-dong
dc.contributor.author郭卫东
dc.date.accessioned2013-03-28T01:23:23Z
dc.date.available2013-03-28T01:23:23Z
dc.date.issued2012-06
dc.identifier.citationSPECTROSCOPY AND SPECTRAL ANALYSIS,2012,32(6):1584-1587zh_CN
dc.identifier.issn1000-0593
dc.identifier.urihttp://dx.doi.org/10.3964/j.issn.1000-0593(2012)06-1584-04
dc.identifier.uriWOS:000305044100030
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/15390
dc.description.abstractThe metabolic processes of jellyfish can produce dissolved organic matter (DOM) which will influence the functioning of the aquatic ecosystems, yet the optical properties of DOM released by jellyfish are unknown. Here we report the absorption and fluorescence properties of DOM released by a medusa species Black fordia virginica during a 24 h incubation experiment. Compared with the control group, an obvious increase in the concentrations of dissolved organic carbon (DOC), absorption coefficient (a(280)) and total dissolved nitrogen (TDN) was observed in incubation group. This clearly demonstrated the release of DOM, chromophoric DOM (CDOM) and dissolved nutrients by B. virginica which feed on enough of Anemia sp. before the experiment. The increase in spectral slope ratio (SR) and decrease in humification index (HIX) indicated that the released D()M was less-humified and had relatively lower molecular weight. Parallel factor analysis (PARAFAC) decomposed the fluorescence matrices of DOM into three humic-like components (C1-C3) and one protein-like component (C4). The F-max of two components (C2: <250, 295/386 nm; C4: 275/334 nm) with the emission wavelength <400 nm increased significantly during the metabolic process of B. virginica. However, the F-max of the other two components with the emission wavelength >400 nm showed little changes. Thus, we suggested a zooplankton index (ZIX) to trace and characterize the DOM excreted by metabolic activity of zooplankton, which is calculated as the ratio of the sum of F-max of all fluorescence components with the emission wavelength <400 nm to the sum of F-max of the other components with the emission wavelength >400 nm.zh_CN
dc.language.isoenzh_CN
dc.publisherOFFICE SPECTROSCOPY & SPECTRAL ANALYSISzh_CN
dc.subjectDissolved organic matterzh_CN
dc.subjectMedusazh_CN
dc.subjectMetabolic processzh_CN
dc.subjectFluorescence excitation-emission matrix spectroscopyzh_CN
dc.subjectParallel factor analysis (PARAFAC)zh_CN
dc.subjectZooplankton index (ZIX)zh_CN
dc.titleSpectral Characteristics of Dissolved Organic Matter Released during the Metabolic Process of Small Medusazh_CN
dc.typeArticlezh_CN


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