Publication Abstracts

Tfaily et al. 2015

Tfaily, M.M., J.E. Corbett, R. Wilson, J.P. Chanton, P.H. Glaser, K.M. Cawley, R. Jaffé, and W.T. Cooper, 2015: Utilization of PARAFAC-modeled Excitation-Emission Matrix (EEM) fluorescence spectroscopy to identify biogeochemical processing of dissolved organic matter in a northern peatland. Photochem. Photobiol., 91, 684-695, doi:10.1111/php.12448.

In this study we contrast the fluorescent properties of dissolved organic matter (DOM) in fens and bogs in a Northern Minnesota peatland using excitation emission matrix fluorescence spectroscopy with parallel factor analysis (EEM-PARAFAC). EEM-PARAFAC identified four humic-like components and one protein-like component and the dynamics of each were evaluated based on their distribution with depth as well as across sites differing in hydrology and major biological species. The PARAFAC-EEM experiments were supported by dissolved organic carbon measurements (DOC), optical spectroscopy (UV-Vis), and compositional characterization by ultrahigh resolution Fourier transform ion cyclotron resonance mass spectroscopy (FT-ICR MS). The FT-ICR MS data indicate that metabolism in peatlands reduces the molecular weights of individual components of DOM, and oxygen-rich less aromatic molecules are selectively biodegraded. Our data suggest that different hydrologic and biological conditions within the larger peat ecosystem drive molecular changes in DOM, resulting in distinctly different chemical compositions and unique fluorescent fingerprints. PARAFAC modeling of EEM data coupled with ultrahigh resolution FT-ICR MS has the potential to provide significant molecular-based information on DOM composition that will support efforts to better understand the composition, sources, and diagenetic status of DOM from different terrestrial and aquatic systems.

Export citation: [ BibTeX ] [ RIS ]

BibTeX Citation

@article{tf03000d,
  author={Tfaily, M. M. and Corbett, J. E. and Wilson, R. and Chanton, J. P. and Glaser, P. H. and Cawley, K. M. and Jaffé, R. and Cooper, W. T.},
  title={Utilization of PARAFAC-modeled Excitation-Emission Matrix (EEM) fluorescence spectroscopy to identify biogeochemical processing of dissolved organic matter in a northern peatland},
  year={2015},
  journal={Photochem. Photobiol.},
  volume={91},
  pages={684--695},
  doi={10.1111/php.12448},
}

[ Close ]

RIS Citation

TY  - JOUR
ID  - tf03000d
AU  - Tfaily, M. M.
AU  - Corbett, J. E.
AU  - Wilson, R.
AU  - Chanton, J. P.
AU  - Glaser, P. H.
AU  - Cawley, K. M.
AU  - Jaffé, R.
AU  - Cooper, W. T.
PY  - 2015
TI  - Utilization of PARAFAC-modeled Excitation-Emission Matrix (EEM) fluorescence spectroscopy to identify biogeochemical processing of dissolved organic matter in a northern peatland
JA  - Photochem. Photobiol.
VL  - 91
SP  - 684
EP  - 695
DO  - 10.1111/php.12448
ER  -

[ Close ]

➤ Return to 2015 Publications

➤ Return to Publications Homepage