scholarly journals Molecular Signatures of Biogeochemical Transformations in Dissolved Organic Matter from Ten World Rivers

2016 ◽  
Vol 4 ◽  
Author(s):  
Thomas Riedel ◽  
Maren Zark ◽  
Anssi V. Vähätalo ◽  
Jutta Niggemann ◽  
Robert G. M. Spencer ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Molecular Signatures ◽  
Biogeochemical Transformations ◽  
World Rivers

scholarly journals Molecular signatures of dissolved organic matter in a tropical karst system

2017 ◽  
Vol 113 ◽  
pp. 141-149 ◽  
Author(s):  
Franziska A. Lechleitner ◽  
Thorsten Dittmar ◽  
James U.L. Baldini ◽  
Keith M. Prufer ◽  
Timothy I. Eglinton
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Molecular Signatures ◽  
Karst System ◽  
Tropical Karst

scholarly journals Origin-specific molecular signatures of dissolved organic matter in the Lena Delta

2014 ◽  
Vol 123 (1-2) ◽  
pp. 1-14 ◽  
Author(s):  
I. Dubinenkov ◽  
R. Flerus ◽  
P. Schmitt-Kopplin ◽  
G. Kattner ◽  
B. P. Koch
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Molecular Signatures ◽  
Lena Delta

scholarly journals Molecular Signatures of Glacial Dissolved Organic Matter from Svalbard and Greenland

2021 ◽  
Author(s):  
Anne M. Kellerman ◽  
Jorien Vonk ◽  
Stephanie McColaugh ◽  
David C. Podgorski ◽  
Elise van Winden ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Molecular Signatures

scholarly journals Chemodiversity of Dissolved Organic Matter in the Amazon Basin

2016 ◽  
Author(s):  
Michael Gonsior ◽  
Juliana Valle ◽  
Philippe Schmitt-Kopplin ◽  
Norbert Hertkorn ◽  
David Bastviken ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Amazon Basin ◽  
River System ◽  
Molecular Ions ◽  
Ion Cyclotron Resonance ◽  
Molecular Signatures ◽  
Clear Water ◽  
Aquatic Life ◽  
Rio Negro

Abstract. Regions in the Amazon Basin have been associated with specific biogeochemical processes, but a detailed chemical classification of the abundant and ubiquitous dissolved organic matter (DOM), beyond specific indicator compounds and bulk measurements, has not yet been established. We sampled water from different locations in the Negro, Madeira/Jamari and Tapajós River areas to characterize the molecular DOM composition and distribution. Ultrahigh resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) combined with excitation emission matrix (EEM) fluorescence spectroscopy and Parallel Factor Analysis (PARAFAC) revealed a large proportion of ubiquitous DOM but also unique area-specific molecular signatures. Unique to the DOM of the Rio Negro area was the large abundance of high molecular weight, diverse hydrogen-deficient and highly oxidized molecular ions deviating from known lignin or tannin compositions, indicating substantial oxidative processing of these ultimately plant-derived polyphenols indicative of these black waters. In contrast, unique signatures in the Madeira/Jamari area were defined by presumably labile sulfur and nitrogen-containing molecules in this white water river system. Waters from the Tapajós confluence area did not show any substantial unique molecular signatures relative to those present in the Rio Madeira and Rio Negro, which implied a lower organic molecular complexity in this clear water tributary. Beside ubiquitous DOM at average H/C and O/C elemental ratios, a distinct and significant unique DOM pool prevailed in the black, white and clear water areas that were also highly correlated with EEM-PARAFAC components and define the frameworks for primary production and other aspects of aquatic life.

Linking the Molecular Signature of Heteroatomic Dissolved Organic Matter to Watershed Characteristics in World Rivers

2015 ◽  
Vol 49 (23) ◽  
pp. 13798-13806 ◽  
Author(s):  
Sasha Wagner ◽  
Thomas Riedel ◽  
Jutta Niggemann ◽  
Anssi V. Vähätalo ◽  
Thorsten Dittmar ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Molecular Signature ◽  
Watershed Characteristics ◽  
World Rivers

scholarly journals Chemodiversity of dissolved organic matter in the Amazon Basin

2016 ◽  
Vol 13 (14) ◽  
pp. 4279-4290 ◽  
Author(s):  
Michael Gonsior ◽  
Juliana Valle ◽  
Philippe Schmitt-Kopplin ◽  
Norbert Hertkorn ◽  
David Bastviken ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Amazon Basin ◽  
Molecular Ions ◽  
Main Stem ◽  
Ion Cyclotron Resonance ◽  
Molecular Signatures ◽  
Clear Water ◽  
Aquatic Life ◽  
Rio Negro

Abstract. Regions in the Amazon Basin have been associated with specific biogeochemical processes, but a detailed chemical classification of the abundant and ubiquitous dissolved organic matter (DOM), beyond specific indicator compounds and bulk measurements, has not yet been established. We sampled water from different locations in the Negro, Madeira/Jamari and Tapajós River areas to characterize the molecular DOM composition and distribution. Ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) combined with excitation emission matrix (EEM) fluorescence spectroscopy and parallel factor analysis (PARAFAC) revealed a large proportion of ubiquitous DOM but also unique area-specific molecular signatures. Unique to the DOM of the Rio Negro area was the large abundance of high molecular weight, diverse hydrogen-deficient and highly oxidized molecular ions deviating from known lignin or tannin compositions, indicating substantial oxidative processing of these ultimately plant-derived polyphenols indicative of these black waters. In contrast, unique signatures in the Madeira/Jamari area were defined by presumably labile sulfur- and nitrogen-containing molecules in this white water river system. Waters from the Tapajós main stem did not show any substantial unique molecular signatures relative to those present in the Rio Madeira and Rio Negro, which implied a lower organic molecular complexity in this clear water tributary, even after mixing with the main stem of the Amazon River. Beside ubiquitous DOM at average H ∕ C and O ∕ C elemental ratios, a distinct and significant unique DOM pool prevailed in the black, white and clear water areas that were also highly correlated with EEM-PARAFAC components and define the frameworks for primary production and other aspects of aquatic life.

Illuminated darkness: Molecular signatures of Congo River dissolved organic matter and its photochemical alteration as revealed by ultrahigh precision mass spectrometry

2010 ◽  
Vol 55 (4) ◽  
pp. 1467-1477 ◽  
Author(s):  
Aron Stubbins ◽  
Robert G. M. Spencer ◽  
Hongmei Chen ◽  
Patrick G. Hatcher ◽  
Kenneth Mopper ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Molecular Signatures ◽  
Congo River
Sign in / Sign up

Export Citation Format

Share Document