Comparison of Two PARAFAC Models of Dissolved Organic Matter Fluorescence for a Mid-Atlantic Forested Watershed in the USA

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dc.contributor.authorSingh, Shatrughanen
dc.contributor.authorInamdar, Shreeramen
dc.contributor.authorScott, Durelle T.en
dc.contributor.departmentBiological Systems Engineeringen
dc.date.accessioned2018-04-30T12:36:08Zen
dc.date.available2018-04-30T12:36:08Zen
dc.date.issued2013-07-11en
dc.date.updated2018-04-29T08:42:03Zen
dc.description.abstractThe composition of dissolved organic matter (DOM) in a mid-Atlantic forested watershed was evaluated using two fluorescence models—one based on previously validated model (Cory and McKnight, 2005) and the other developed specifically for our study site. DOM samples for the models were collected from multiple watershed sources over a two-year period. The previously validated parallel factor analysis (PARAFAC) model had 13 DOM components whereas our site-specific model yielded six distinct components including two terrestrial humic-like, two microbial-derived humic-like, and two protein-like components. The humic-like components were highest in surficial watershed sources and decreased from soil water to groundwater whereas the protein-like components were highest for groundwater sources. Discriminant analyses indicated that our site-specific model was more sensitive to subtle differences in DOM and the sum of the humic- and protein-like constituents yielded more pronounced differences among watershed sources as opposed to the prevalidated model. Dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) concentrations and selected DOM metrics were also more strongly correlated with the site-specific model components. These results suggest that while the pre-validated model may capture broader trends in DOM composition and allow comparisons with other study sites, a site-specific model will be more sensitive for characterizing within-site differences in DOM.en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationShatrughan Singh, Shreeram Inamdar, and Durelle Scott, “Comparison of Two PARAFAC Models of Dissolved Organic Matter Fluorescence for a Mid-Atlantic Forested Watershed in the USA,” Journal of Ecosystems, vol. 2013, Article ID 532424, 16 pages, 2013. doi:10.1155/2013/532424en
dc.identifier.doihttps://doi.org/10.1155/2013/532424en
dc.identifier.orcidScott, Durelle T. [0000-0002-5792-789X]en
dc.identifier.urihttp://hdl.handle.net/10919/82949en
dc.language.isoenen
dc.publisherHindawien
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.holderCopyright © 2013 Shatrughan Singh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titleComparison of Two PARAFAC Models of Dissolved Organic Matter Fluorescence for a Mid-Atlantic Forested Watershed in the USAen
dc.title.serialJournal of Ecosystemsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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