Origin-specific molecular signatures of dissolved organic matter in the Lena Delta
| LEADER | caa a22 4500 | ||
|---|---|---|---|
| 001 | 605517118 | ||
| 003 | CHVBK | ||
| 005 | 20210128100718.0 | ||
| 007 | cr unu---uuuuu | ||
| 008 | 210128e20150301xx s 000 0 eng | ||
| 024 | 7 | 0 | |a 10.1007/s10533-014-0049-0 |2 doi |
| 035 | |a (NATIONALLICENCE)springer-10.1007/s10533-014-0049-0 | ||
| 245 | 0 | 0 | |a Origin-specific molecular signatures of dissolved organic matter in the Lena Delta |h [Elektronische Daten] |c [I. Dubinenkov, R. Flerus, P. Schmitt-Kopplin, G. Kattner, B. Koch] |
| 520 | 3 | |a Large Arctic rivers discharge significant amounts of dissolved organic matter (DOM) into the Arctic Ocean. We sampled natural waters of the Lena River, the Buor-Khaya Bay (Laptev Sea), permafrost melt water creeks, ice complex melt water creeks and a lake. The goal of this study was to characterize the molecular DOM composition with respect to different water bodies within the Lena Delta. We aimed at an identification of source-specific DOM molecular markers and their relative contribution to DOM of different origin. The molecular characterization was performed for solid-phase extracted DOM by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). Average dissolved organic carbon concentrations in the original samples were 490±75µmolCL−1 for riverine and bay samples and 399±115µmolCL−1 for permafrost melt water creeks. Average TDN concentrations were elevated in the permafrost melt waters (19.7±7.1µmolNL−1) in comparison to the river and the bay (both 13.2±2.6µmolNL−1). FT-ICR MS and statistical tools demonstrated that the origin of DOM in the Lena Delta was systematically reflected in its molecular composition. Magnitude weighted parameters calculated from MS data (O/Cwa, H/Cwa, C/Nwa) highlighted preliminary sample discrimination. The highest H/Cwa of 1.315 was found for DOM in melt water creeks in comparison to 1.281 for river and 1.230 for the bay samples. In the bay samples we observed a higher fraction of oxygen-rich components which was reflected in an O/Cwa ratio of 0.445 in comparison to 0.425 and 0.427 in the river and creeks, respectively. From the southernmost location to the bay a relative depletion of nitrogenous molecular markers and an enrichment of oxidized DOM components occurred. The highest contribution of nitrogenous components was indicative for creeks reflected in a C/Nwa of 104 in comparison to 143 and 176 in the river and bay, respectively. These observations were studied on a molecular formula level using principal component and indicator value analyses. The results showed systematic differences with respect to water origin and constitute an important basis for a better mechanistic understanding of DOM transformations in the changing Arctic rivers. | |
| 540 | |a Springer International Publishing Switzerland, 2014 | ||
| 690 | 7 | |a Arctic |2 nationallicence | |
| 690 | 7 | |a Lena Delta |2 nationallicence | |
| 690 | 7 | |a Permafrost |2 nationallicence | |
| 690 | 7 | |a DOM |2 nationallicence | |
| 690 | 7 | |a FT-ICR MS |2 nationallicence | |
| 690 | 7 | |a Molecular markers |2 nationallicence | |
| 700 | 1 | |a Dubinenkov |D I. |u Ecological Chemistry, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar und Meeresforschung, Am Handelshafen 12, 27570, Bremerhaven, Germany |4 aut | |
| 700 | 1 | |a Flerus |D R. |u Ecological Chemistry, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar und Meeresforschung, Am Handelshafen 12, 27570, Bremerhaven, Germany |4 aut | |
| 700 | 1 | |a Schmitt-Kopplin |D P. |u Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstädter Landstraße 1, 85764, Neuherberg, Germany |4 aut | |
| 700 | 1 | |a Kattner |D G. |u Ecological Chemistry, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar und Meeresforschung, Am Handelshafen 12, 27570, Bremerhaven, Germany |4 aut | |
| 700 | 1 | |a Koch |D B. |u Ecological Chemistry, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar und Meeresforschung, Am Handelshafen 12, 27570, Bremerhaven, Germany |4 aut | |
| 773 | 0 | |t Biogeochemistry |d Springer International Publishing |g 123/1-2(2015-03-01), 1-14 |x 0168-2563 |q 123:1-2<1 |1 2015 |2 123 |o 10533 | |
| 856 | 4 | 0 | |u https://doi.org/10.1007/s10533-014-0049-0 |q text/html |z Onlinezugriff via DOI |
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 900 | 7 | |a Metadata rights reserved |b Springer special CC-BY-NC licence |2 nationallicence | |
| 908 | |D 1 |a research-article |2 jats | ||
| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-springer | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1007/s10533-014-0049-0 |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Dubinenkov |D I. |u Ecological Chemistry, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar und Meeresforschung, Am Handelshafen 12, 27570, Bremerhaven, Germany |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Flerus |D R. |u Ecological Chemistry, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar und Meeresforschung, Am Handelshafen 12, 27570, Bremerhaven, Germany |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Schmitt-Kopplin |D P. |u Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstädter Landstraße 1, 85764, Neuherberg, Germany |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Kattner |D G. |u Ecological Chemistry, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar und Meeresforschung, Am Handelshafen 12, 27570, Bremerhaven, Germany |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Koch |D B. |u Ecological Chemistry, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar und Meeresforschung, Am Handelshafen 12, 27570, Bremerhaven, Germany |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Biogeochemistry |d Springer International Publishing |g 123/1-2(2015-03-01), 1-14 |x 0168-2563 |q 123:1-2<1 |1 2015 |2 123 |o 10533 | ||