Recent accumulation of trace metals in sediments at the DYFAMED site (Northwestern Mediterranean Sea)

Martín, Jacobo; Sanchez-Cabeza, Joan-Albert; Eriksson, Mats; Levy, Isabelle; Miquel, Juan‐Carlos

doi:10.1016/j.marpolbul.2009.03.013

Cited by 40 publications

(34 citation statements)

References 38 publications

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“…Sediment accumulation rates ranged between 0.07 and 0.22 cm yr −1 , and increased together with the clay content (from 15.8 to 26.3 %). These values are in agreement with other studies previously conducted in the deep basin of the Gulf of Lions (Miralles et al, 2005 and references therein) and in the Ligurian Sea (Martín et al, 2009;Heimbürger et al, 2012). Despite differences in sediment grain size and sedimentation rates, POC content was approximately the same at all sites (around 0.6 %).…”

Section: Seabed Characteristicssupporting

confidence: 92%

Impact of open-ocean convection on particle fluxes and sediment dynamics in the deep margin of the Gulf of Lions

et al. 2013

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The deep outer margin of the Gulf of Lions and the adjacent basin, in the western Mediterranean Sea, are regularly impacted by open-ocean convection, a major hydrodynamic event responsible for the ventilation of the deep water in the western Mediterranean Basin. However, the impact of open-ocean convection on the flux and transport of particulate matter remains poorly understood. The variability of water mass properties (i.e., temperature and salinity), currents, and particle fluxes were monitored between September 2007 and April 2009 at five instrumented mooring lines deployed between 2050 and 2350-m depth in the deepest continental margin and adjacent basin. Four of the lines followed a NW–SE transect, while the fifth one was located on a sediment wave field to the west. The results of the main, central line SC2350 ("LION") located at 42°02.5′ N, 4°41′ E, at 2350-m depth, show that open-ocean convection reached mid-water depth (≈ 1000-m depth) during winter 2007–2008, and reached the seabed (≈ 2350-m depth) during winter 2008–2009. Horizontal currents were unusually strong with speeds up to 39 cm s<sup>−1</sup> during winter 2008–2009. The measurements at all 5 different locations indicate that mid-depth and near-bottom currents and particle fluxes gave relatively consistent values of similar magnitude across the study area except during winter 2008–2009, when near-bottom fluxes abruptly increased by one to two orders of magnitude. Particulate organic carbon contents, which generally vary between 3 and 5%, were abnormally low (≤ 1%) during winter 2008–2009 and approached those observed in surface sediments (≈ 0.6%). Turbidity profiles made in the region demonstrated the existence of a bottom nepheloid layer, several hundred meters thick, and related to the resuspension of bottom sediments. These observations support the view that open-ocean deep convection events in the Gulf of Lions can cause significant remobilization of sediments in the deep outer margin and the basin, with a subsequent alteration of the seabed likely impacting the functioning of the deep-sea ecosystem

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Section: Seabed Characteristicssupporting

confidence: 92%

Impact of open-ocean convection on particle fluxes and sediment dynamics in the deep margin of the Gulf of Lions

et al. 2013

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“…Si, Al, Fe or Ti is frequently used as the reference element. In this study, Ti was used as the reference element (Martín et al, 2009), given that it is a major crustal component and is minimally affected by human emission. The EF value of an element X in SPM and COM is defined as below…”

Section: Enrichment Factors Of Metal Elements In Spm and Commentioning

confidence: 99%

Heavy metals in particulate and colloidal matter from atmospheric deposition of urban Guangzhou, South China

Huang

Duan

Cheng

et al. 2014

Marine Pollution Bulletin

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“…The toxicity and mobility of the metals in sediments vary among different chemical forms (Cuong and Obbard 2006;Yu et al 2010). Therefore, the evaluation of distribution and mobility/potential bioavailability of heavy metals in surface sediments is an important step to evaluate the degree of contamination of an aquatic ecosystem (Martin et al 2009;Sprovieri et al 2007). Assessment of biologically available fractions of heavy metals helps to evaluate their potential for mobilization and availability to benthic organisms (Rodrigues et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Occurrence, risk assessment, and source apportionment of heavy metals in surface sediments from Khanpur Lake, Pakistan

Iqbal

Shah

2014

J Anal Sci Technol

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Background: The present study was carried out to assess the seasonal variations, source apportionment, and risk assessment of heavy metals (Cd, Cr, Cu, Fe, Mn, Pb, and Zn) in the surface sediments from the Khanpur Lake, Pakistan. Methods: Composite samples are collected and processed to measure the concentrations of heavy metals in Ca(NO 3 ) 2 extract and acid extract of the sediments using flame atomic absorption spectrophotometry.

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Recent accumulation of trace metals in sediments at the DYFAMED site (Northwestern Mediterranean Sea)

Cited by 40 publications

References 38 publications

Impact of open-ocean convection on particle fluxes and sediment dynamics in the deep margin of the Gulf of Lions

Impact of open-ocean convection on particle fluxes and sediment dynamics in the deep margin of the Gulf of Lions

Heavy metals in particulate and colloidal matter from atmospheric deposition of urban Guangzhou, South China

Occurrence, risk assessment, and source apportionment of heavy metals in surface sediments from Khanpur Lake, Pakistan

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