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Sediment alkaline-extracted organic matter (AEOM)fluorescence : An archive of Holocene marine organic matter origins

Funkey, Carolina P. LU ; Conley, Daniel J. LU and Stedmon, Colin A. (2019) In Science of the Total Environment 676. p.298-304
Abstract


Organic matter (OM)is comprised of a complex mixture of substrates, which are difficult to fully characterize. Therefore a range of analytical approaches is applied to provide a better understanding of the dynamics and biogeochemical cycling of aquatic system. One approach is UV–Visible spectroscopy, which includes measurements of spectral absorption and fluorescence of colored and fluorescent fractions of dissolved OM (DOM, CDOM and FDOM). In this study OM fluorescence is characterized by excitation-emission matrix spectroscopy on alkaline extracted DOM from a Baltic Sea sediment core that spanned 8500 years and fluctuating levels of hypoxia. Our results showed that three... (More)


Organic matter (OM)is comprised of a complex mixture of substrates, which are difficult to fully characterize. Therefore a range of analytical approaches is applied to provide a better understanding of the dynamics and biogeochemical cycling of aquatic system. One approach is UV–Visible spectroscopy, which includes measurements of spectral absorption and fluorescence of colored and fluorescent fractions of dissolved OM (DOM, CDOM and FDOM). In this study OM fluorescence is characterized by excitation-emission matrix spectroscopy on alkaline extracted DOM from a Baltic Sea sediment core that spanned 8500 years and fluctuating levels of hypoxia. Our results showed that three underlying fluorescence components had strong correlations with carbon, nitrogen content and δ
15
N. Our results demonstrate that optical properties of extracted OM from sediments reveal information about OM quality and quantity similar to those of biomarkers, which can be a useful additional tool for investigating OM deposition.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Baltic Sea, Burial, Excitation-emission matrix spectroscopy, Fluorescence, Holocene, Organic matter
in
Science of the Total Environment
volume
676
pages
7 pages
publisher
Elsevier
external identifiers
  • scopus:85064812523
ISSN
0048-9697
DOI
10.1016/j.scitotenv.2019.04.170
language
English
LU publication?
yes
id
57821010-5e46-40ef-9e78-c45f47699c31
date added to LUP
2019-05-08 11:12:57
date last changed
2019-05-28 03:58:11
@article{57821010-5e46-40ef-9e78-c45f47699c31,
  abstract     = {<p><br>
                                                         Organic matter (OM)is comprised of a complex mixture of substrates, which are difficult to fully characterize. Therefore a range of analytical approaches is applied to provide a better understanding of the dynamics and biogeochemical cycling of aquatic system. One approach is UV–Visible spectroscopy, which includes measurements of spectral absorption and fluorescence of colored and fluorescent fractions of dissolved OM (DOM, CDOM and FDOM). In this study OM fluorescence is characterized by excitation-emission matrix spectroscopy on alkaline extracted DOM from a Baltic Sea sediment core that spanned 8500 years and fluctuating levels of hypoxia. Our results showed that three underlying fluorescence components had strong correlations with carbon, nitrogen content and δ                             <br>
                            <sup>15</sup><br>
                                                         N. Our results demonstrate that optical properties of extracted OM from sediments reveal information about OM quality and quantity similar to those of biomarkers, which can be a useful additional tool for investigating OM deposition.                         <br>
                        </p>},
  author       = {Funkey, Carolina P. and Conley, Daniel J. and Stedmon, Colin A.},
  issn         = {0048-9697},
  keyword      = {Baltic Sea,Burial,Excitation-emission matrix spectroscopy,Fluorescence,Holocene,Organic matter},
  language     = {eng},
  pages        = {298--304},
  publisher    = {Elsevier},
  series       = {Science of the Total Environment},
  title        = {Sediment alkaline-extracted organic matter (AEOM)fluorescence : An archive of Holocene marine organic matter origins},
  url          = {http://dx.doi.org/10.1016/j.scitotenv.2019.04.170},
  volume       = {676},
  year         = {2019},
}