Matches in SemOpenAlex for { <https://semopenalex.org/work/W4239782512> ?p ?o ?g. }
Showing items 1 to 84 of
84
with 100 items per page.
- W4239782512 endingPage "S457" @default.
- W4239782512 startingPage "S457" @default.
- W4239782512 abstract "Trace metals (Cd, U, Co, Ni, Cu, Ba, Fe, Mn), total organic carbon (TOC) and C and N stable isotope signatures (δ13C and δ15N) were determined in short sediments cores from the inner and outer shelf off Concepción, Chile (∼36°S). The objectives were to establish the effect of environmental conditions on trace metal distributions at two shelf sites, one affected by seasonal oxygenation and the other by permanent low oxygen conditions due to the presence of the oxygen minimum zone (OMZ). We evaluate trace metals as proxies of past changes in primary productivity and the bottom water oxygen regime. Concentrations of pore water sulfides and NH4+ were also measured as indicators of the main diagenetic pathways at each site. Our results for the inner shelf (seasonal suboxia) suggest that the oxidative state of the sediments responds to seasonal pulses of organic matter and that seasonal oxygenation develops during high and low primary productivity in the water column. Here, positive fluxes (to the water column) estimated from pore water concentrations of several elements were observed (Ba, Co, Ni, Fe and Mn). The less reduced environment at this site produces authigenic enrichment of Cu associated with the formation of oxides in the oxic surface sediment layer, and the reduction of U within deeper sediment sections occur consistently with negative estimated pore water fluxes. In the outer shelf sediments (permanent suboxia, OMZ site), negative fluxes (to the sediment) were estimated for all elements, but these sediments showed authigenic enrichments only for Cd, Cu and U. The short oxygenation period during the winter season did not affect the accumulation of these metals on the shelf. The distribution of Cu, Cd and U have been preserved within the sediments and the authigenic accumulation rates estimated showed a decrease from the deep sections of the core to the surface sediments. This could be explained by a gradual decrease in the strength of the OMZ in the last 100 years, in combination with periods of strong oxygenations during El Niño events." @default.
- W4239782512 created "2022-05-12" @default.
- W4239782512 creator A5004599136 @default.
- W4239782512 creator A5006944384 @default.
- W4239782512 creator A5010633732 @default.
- W4239782512 creator A5013239459 @default.
- W4239782512 creator A5029243893 @default.
- W4239782512 creator A5046053578 @default.
- W4239782512 creator A5084873612 @default.
- W4239782512 date "2012-12-01" @default.
- W4239782512 modified "2023-10-05" @default.
- W4239782512 title "Résultats à moyen terme des allogreffes méniscales réalisées sous arthroscopie sans plots osseux. À propos de 22 cas" @default.
- W4239782512 doi "https://doi.org/10.1016/j.rcot.2012.10.054" @default.
- W4239782512 hasPublicationYear "2012" @default.
- W4239782512 type Work @default.
- W4239782512 citedByCount "0" @default.
- W4239782512 crossrefType "journal-article" @default.
- W4239782512 hasAuthorship W4239782512A5004599136 @default.
- W4239782512 hasAuthorship W4239782512A5006944384 @default.
- W4239782512 hasAuthorship W4239782512A5010633732 @default.
- W4239782512 hasAuthorship W4239782512A5013239459 @default.
- W4239782512 hasAuthorship W4239782512A5029243893 @default.
- W4239782512 hasAuthorship W4239782512A5046053578 @default.
- W4239782512 hasAuthorship W4239782512A5084873612 @default.
- W4239782512 hasConcept C102579867 @default.
- W4239782512 hasConcept C107872376 @default.
- W4239782512 hasConcept C111368507 @default.
- W4239782512 hasConcept C114793014 @default.
- W4239782512 hasConcept C115393850 @default.
- W4239782512 hasConcept C122846477 @default.
- W4239782512 hasConcept C127313418 @default.
- W4239782512 hasConcept C130452526 @default.
- W4239782512 hasConcept C158787203 @default.
- W4239782512 hasConcept C17409809 @default.
- W4239782512 hasConcept C178790620 @default.
- W4239782512 hasConcept C185592680 @default.
- W4239782512 hasConcept C187320778 @default.
- W4239782512 hasConcept C199289684 @default.
- W4239782512 hasConcept C2778566039 @default.
- W4239782512 hasConcept C2780275952 @default.
- W4239782512 hasConcept C2816523 @default.
- W4239782512 hasConcept C34682378 @default.
- W4239782512 hasConcept C48743137 @default.
- W4239782512 hasConcept C544153396 @default.
- W4239782512 hasConceptScore W4239782512C102579867 @default.
- W4239782512 hasConceptScore W4239782512C107872376 @default.
- W4239782512 hasConceptScore W4239782512C111368507 @default.
- W4239782512 hasConceptScore W4239782512C114793014 @default.
- W4239782512 hasConceptScore W4239782512C115393850 @default.
- W4239782512 hasConceptScore W4239782512C122846477 @default.
- W4239782512 hasConceptScore W4239782512C127313418 @default.
- W4239782512 hasConceptScore W4239782512C130452526 @default.
- W4239782512 hasConceptScore W4239782512C158787203 @default.
- W4239782512 hasConceptScore W4239782512C17409809 @default.
- W4239782512 hasConceptScore W4239782512C178790620 @default.
- W4239782512 hasConceptScore W4239782512C185592680 @default.
- W4239782512 hasConceptScore W4239782512C187320778 @default.
- W4239782512 hasConceptScore W4239782512C199289684 @default.
- W4239782512 hasConceptScore W4239782512C2778566039 @default.
- W4239782512 hasConceptScore W4239782512C2780275952 @default.
- W4239782512 hasConceptScore W4239782512C2816523 @default.
- W4239782512 hasConceptScore W4239782512C34682378 @default.
- W4239782512 hasConceptScore W4239782512C48743137 @default.
- W4239782512 hasConceptScore W4239782512C544153396 @default.
- W4239782512 hasIssue "8" @default.
- W4239782512 hasLocation W42397825121 @default.
- W4239782512 hasOpenAccess W4239782512 @default.
- W4239782512 hasPrimaryLocation W42397825121 @default.
- W4239782512 hasRelatedWork W1983399196 @default.
- W4239782512 hasRelatedWork W201352748 @default.
- W4239782512 hasRelatedWork W2058426661 @default.
- W4239782512 hasRelatedWork W2062637214 @default.
- W4239782512 hasRelatedWork W2099886903 @default.
- W4239782512 hasRelatedWork W2103412266 @default.
- W4239782512 hasRelatedWork W2389687840 @default.
- W4239782512 hasRelatedWork W2581368865 @default.
- W4239782512 hasRelatedWork W2749541073 @default.
- W4239782512 hasRelatedWork W2953261018 @default.
- W4239782512 hasVolume "98" @default.
- W4239782512 isParatext "false" @default.
- W4239782512 isRetracted "false" @default.
- W4239782512 workType "article" @default.