Marine sediments
Structure of hydrocarbonoclastic nitrate-reducing bacterial communities in bioturbated coastal marine sediments
... Materials and methods Mesocosms set-up A mesocosm system miming the tidal cycles was setup with marine sediments (mesocosm boxes: 65 cm 9 50 cm 9 41 cm; c. 30 L of sediment). Four conditions were applied in ...
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Databases for sea surface paleotemperature based on geochemical proxies from marine sediments: implications for model-data comparisons
... In marine sediments, available high-quality SST data have clearly detected the onset of a cooling acceleration associated with the LIA (McGregor et ...First, marine sequences are particularly ...
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Toward direct, micron-scale XRF elemental maps and quantitative profiles of wet marine sediments
... wet marine sediments with a slightly higher range of element concentrations and higher water contents (the latter ranging from 36 to 65%) compared to our ...
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Dissolved inorganic carbon and alkalinity fluxes from coastal marine sediments: model estimates for different shelf environments and sensitivity to global change
... in marine sediments and should thus be considered a method of choice to quantify benthic alkalinity and DIC ...of sediments from the shelf (200 m) to the abyss (3000 m), which quantified carbon ...
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The in vitro influence of the burrowing polychaete Nereis diversicolor on the fate of petroleum hydrocarbons in marine sediments
... Among the pollutants, numerous studies have investigated the fate of petroleum hydrocarbons in marine sediments 9,10,11,12 . However, only a few works have taken into account the influence of burrowing ...
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Dynamics of bacterial assemblages and removal of polycyclic aromatic hydrocarbons in oil-contaminated coastal marine sediments subjected to contrasted oxygen regimes
... in sediments (by sedimentation or through the action of macrobenthic organisms, respectively), they are quickly trapped in suboxic or anoxic ...coastal sediments, these habitats are largely devoid of ...
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Distribution and diagenesis of trace metals in marine sediments of a coastal Mediterranean area: St-Georges Bay (Lebanon)
... divide sediments into different zones of redox conditions ...in marine sediments were conducted in the Mediterranean Sea (Álvarez-Iglesias et ...coastal sediments of St-Georges Bay – Dora; 2) ...
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Draft Genome Sequence of Shewanella algidipiscicola H1, a Highly Chromate-Resistant Strain Isolated from Mediterranean Marine Sediments
... Draft Genome Sequence of Shewanella algidipiscicola H1, a Highly Chromate-Resistant Strain Isolated from Mediterranean Marine Sediments Hiba Baaziz, a,b Olivier N. Lemaire, a Cécile Jourlin-Castelli, a ...
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Determining Shear Wave Velocities in Soft Marine Sediments
... Despite this interest, determining shear wave velocities in soft marine sediments has been difficult and until recently no measurements with velocity or full waveform acoustic logs had b[r] ...
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Impact of feeding by Arenicola marina (L.) and ageing of faecal material on fatty acid distribution and bacterial community structure in marine sediments: An experimental approach
... in marine sediments, through activities such as particle reworking, irrigation, feeding and bacterial gardening/stimulation ( Banta et ...process, marine worms produce faeces which can represent a ...
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Coupled anoxic nitrification/manganese reduction in marine sediments
... Although NO 3 2 and NO 2 2 were produced in all incubations, the net rates of production and the maximum NO 3 2 or NO 2 2 concentrations attained, differed substantially between the var- ious incubation series (e.g., ...
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Influence of various redox conditions on the degradation of microalgal triacylglycerols and fatty acids in marine sediments
... on the burial and degradation of sedimentary lipid components (e.g. Gilbert et al., 1994, 1996; Sun et al., 1999; Ingalls et al., 2000; Grossi et al., 2002, 2003 ), the influence of redox oscillation on lipid degradation ...
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Distribution and sources of organic matter in surface marine sediments across the North American Arctic margin.
... surface sediments from the western region of the study area (Bering shelf, Chukchi shelf, Barrow Canyon all with CA :LP > ...and sediments where contributions from subsurface vascular plant biomass ...
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Data on elemental concentrations in marine sediments from the South and South West of England
... WATER SEDIMENT’, ‘ESTUARY SEDIMENT - INTER TIDAL’, ‘ESTUARY SEDIMENT - SUB TIDAL’, ‘COASTAL / MARINE SEDIMENT - <63UM FRACTION’ and ‘ESTUARY SEDIMENT - INTER TIDAL - <63UM FRACTION’ were first selected. ...
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Imaging Oxygen Distribution in Marine Sediments. The Importance of Bioturbation and Sediment Heterogeneity
... makes possible high resolution measurement of two-dimensional vertical distribu- tion and spatial heterogeneity of solutes in the sedimentary column (Glud et al. 1996; Hulth et al. 2002; Zhu et al. 2006). Oxygen plays a ...
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Inhibition of denitrification by hydrocarbons in marine sediments. Role of Nereis diversicolor
... Numerous works have demonstrated the influence of biotur- bation on both denitrification activity in sediment and ad- sorbed hydrocarbon reworking. However, the link[r] ...
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Biogeochemistry of dissolved free amino acids in marine sediments
... The DFAA in BBP sediments are made up primarily of glutamic acid and a-aminoglutaric acids. a-Aminoglutaric acid was first observed during this thesis work as an u[r] ...
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Response of an archaeal community from anoxic coastal marine sediments to experimental petroleum contamination
... coastal sediments and has demonstrated that petro- leum contamination induced significant modification in the community composition associated with a strong decrease in ...oiled sediments, methano- genic ...
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Black carbon in marine sediments : quantification and implications for the sorption of polycyclic aromatic hydrocarbons
... This model assumed that the distribution coefficient for pyrene (Kd) is independent of the dissolved concentration; however the untreated and combusted sediment data sugge[r] ...
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Sensitivity of the CaCO3 content of marine sediments to the kinetic expression of CaCO3 dissolution
... With the help of an ocean biogeochemical model it was found that different kinetic expressions for pelagic CaCO 3 dissolution in an ocean acidification scenario re[r] ...
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