Transport and fate of Danube Delta terrestrial organic matter in the Northwest Black Sea mixing zone

Saliot, A.; Parrish, Christopher C.; Sadouni, N.; Bouloubassi, Ioanna; Fillaux, Joëlle; Cauwet, Gustave

doi:10.1016/s0304-4203(02)00067-1

Cited by 45 publications

(26 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The percentage of allochthonous carbon (% C-terr) in marine sediments may be obtained from the ratio of an allochthonous biomarker (normalized to TOC) between marine sediments and the river mouth water (Bouloubassi et al, 1997;Saliot et al, 2002). This approach assumes that the allochthonous biomarkers are conservative and that the only factor affecting the ratio between allochthonous biomarkers and terrestrial organic carbon in sediments is dilution with the marine organic carbon.…”

Section: Estimation Of Allochthonous Organic Carbon Content In Sedimentsmentioning

confidence: 99%

“…Several studies from the 1980s have partially characterized the Mackenzie-Beaufort sea system using specific molecular compounds (Yunker et al, 1995(Yunker et al, , 2002(Yunker et al, , 2011Belicka et al, 2004;Goñi et al, 2000Goñi et al, , 2005Drenzek et al, 2007). In particular, these studies all reported data on lipid biomarkers, which are well suited to evaluate the supply of terrigenous organic matter (Bouloubassi et al, 1997;Saliot et al, 2002), but only a few have combined these analyses with compound-specific isotope determinations (Drenzek et al, 2007;Goñi et al, 2005). The approach using the δ 13 C values of individual compounds is relevant since the isotope data provide additional evidence supporting the proposed origins of the biomarkers, and in certain cases this combination is essential for an accurate determination of the origin of the biomarkers.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Carbon sources in suspended particles and surface sediments from the Beaufort Sea revealed by molecular lipid biomarkers and compound-specific isotope analysis

et al. 2013

View full text Add to dashboard Cite

Molecular lipid biomarkers (hydrocarbons, alcohols, sterols and fatty acids) and compound-specific isotope analysis of suspended particulate organic matter (SPM) and surface sediments of the Mackenzie Shelf and slope (southeast Beaufort Sea, Arctic Ocean) were studied in summer 2009. The concentrations of the molecular lipid markers, characteristic of known organic matter sources, were grouped and used as proxies to evaluate the relative importance of fresh algal, detrital algal, fossil, C₃ terrestrial plants, bacterial and zooplankton material in the organic matter (OM) of this area. Fossil and detrital algal contributions were the major fractions of the freshwater SPM from the Mackenzie River with ~34% each of the total molecular biomarkers. Fresh algal, C₃ terrestrial, bacterial and zooplanktonic components represented much lower percentages, 17, 10, 4 and <1%, respectively. In marine SPM from the Mackenzie slope, the major contributions were fresh and detrital algal components (>80%), with a minor contribution of fossil and C₃ terrestrial biomarkers. Characterization of the sediments revealed a major sink of refractory algal material mixed with some fresh algal material, fossil hydrocarbons and a small input of C₃ terrestrial sources. In particular, the sediments from the shelf and at the mouth of the Amundsen Gulf presented the highest contribution of detrital algal material (60–75%), whereas those from the slope contained the highest proportion of fossil (40%) and C₃ terrestrial plant material (10%). Overall, considering that the detrital algal material is marine derived, autochthonous sources contributed more than allochthonous sources to the OM lipid pool. Using the ratio of an allochthonous biomarker (normalized to total organic carbon, TOC) found in the sediments to those measured at the river mouth water, we estimated that the fraction of terrestrial material preserved in the sediments accounted for 30–40% of the total carbon in the inner shelf sediments, 17% in the outer shelf and Amundsen Gulf and up to 25% in the slope sediments. These estimates are low compared to other studies conducted 5–20 yr earlier, and they support the increase in primary production during the last decade mainly because of the increase in the number of ice-free days and due to the strength and persistence of winds favouring upwelling

show abstract

Section: Estimation Of Allochthonous Organic Carbon Content In Sedimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Carbon sources in suspended particles and surface sediments from the Beaufort Sea revealed by molecular lipid biomarkers and compound-specific isotope analysis

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Many organic compounds have been identified in the Danube River, i.e., to date: alkylphenolic compounds, lipid series (n-alkanoic acids, n-alkanes, n-alkanols and sterols), pharmaceuticals (such as ibuprofen, diclofenac, sulphamethoxazole and carbamazepine), pesticides and their degradation products (e.g., bentazone, 2,4-D, mecoprop, atrazine, terbuthylazine and desethylterbutylazine), perfluorinated acids, and endocrine disrupting compounds (nonylphenol, NPE1C, bisphenol A and estrone) Polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and organochlorine pesticides (OCPs), such as dichlorodiphenyltrichloroethane (DDT) and analogues, hexachlorocyclohexanes (HCHs) and hexachlorobenzene (HCB), were measured as well [18][19][20][21].…”

Section: Organic Pollution Of Watersmentioning

confidence: 99%

Organic Pollution of Water and Human Health

Pawłowicz¹

2017

hpc

View full text Add to dashboard Cite

“…Eglinton and Hamilton, 1967;Eglinton et al, 1968;Schnitzer and Neyroud, 1975;Volkman et al, 1998;Saliot et al, 2002).…”

Section: Biomarker Constraints On Oc Residence Timeunclassified

Spatial and temporal dynamics of biogeochemical processes in the Fraser River, Canada : a coupled organic-inorganic perspective

Voß¹

2014

View full text Add to dashboard Cite

The great geologic and climatic diversity of the Fraser River basin in southwestern Canada render it an excellent location for understanding biogeochemical cycling of sediments and terrigenous organic carbon in a relatively pristine, large, temperate watershed. Sediments delivered by all tributaries have the potential to reach the ocean due to a lack of main stem lakes or impoundments, a unique feature for a river of its size. This study documents the concentrations of a suite of dissolved and particulate organic and inorganic constituents, which elucidate spatial and temporal variations in chemical weathering (including carbonate weathering in certain areas) as well as organic carbon mobilization, export, and biogeochemical transformation. Radiogenic strontium isotopes are employed as a tracer of sediment provenance based on the wide variation in bedrock age and lithology in the Fraser basin. The influence of sediments derived from the headwaters is detectable at the river mouth, however more downstream sediment sources predominate, particularly during high discharge conditions. Bulk radiocarbon analyses are used to quantify terrestrial storage timescales of organic carbon and distinguish between petrogenic and biospheric organic carbon, which is critical to assessing the role of rivers in long-term atmospheric CO 2 consumption. The estimated terrestrial residence time of biospheric organic carbon in the Fraser basin is 650 years, which is relatively short compared to other larger rivers (Amazon, Ganges-Brahmaputra) in which this assessment has been performed, and is likely related to the limited floodplain storage capacity and non-steadystate post-glacial erosion state of the Fraser River. A large portion of the dissolved inorganic carbon load of the Fraser River (>80%) is estimated to derive from remineralization of dissolved organic carbon, particularly during the annual spring freshet when organic carbon concentrations increase rapidly. This thesis establishes a baseline for carbon cycling in a largely unperturbed modern mid-latitude river system and establishes a framework for future process studies on the mechanisms of organic carbon turnover and organic matter-mineral associations in river systems.

show abstract

Transport and fate of Danube Delta terrestrial organic matter in the Northwest Black Sea mixing zone

Cited by 45 publications

References 67 publications

Carbon sources in suspended particles and surface sediments from the Beaufort Sea revealed by molecular lipid biomarkers and compound-specific isotope analysis

Carbon sources in suspended particles and surface sediments from the Beaufort Sea revealed by molecular lipid biomarkers and compound-specific isotope analysis

Organic Pollution of Water and Human Health

Spatial and temporal dynamics of biogeochemical processes in the Fraser River, Canada : a coupled organic-inorganic perspective

Contact Info

Product

Resources

About