Chemical multi-contamination drives benthic prokaryotic diversity in the anthropized Toulon Bay

Misson, Benjamin; Garnier, Cédric; Lauga, Béatrice; Dang, Duc Huy; Ghiglione, Jean-François; Mullot, Jean-Ulrich; Duran, Robert; Pringault, Olivier

doi:10.1016/j.scitotenv.2016.02.038

Cited by 62 publications

(37 citation statements)

References 72 publications

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“…S1). The PAH concentrations in the surface layer of the MIS sediment core were in agreement with previous recordings from the MIS site (34.0 × 10 3 ng g -1 ; Misson et al, 2016) and in the Toulon coastal area (48.1 × 10 3 ng g -1 ; Benlahcen et al, 1997). The PAH concentrations we recorded in the whole core were in the upper-range of values reported for sediments from other regions of the Mediterranean Sea (see Table 6 in .…”

Section: Contamination Levels and Origin Of Pahs In The Sediment Coresupporting

confidence: 90%

“…It is located deep inside Toulon Bay and enclosed by a sea wall. Because of this separation, and also the irregular freshwater inputs and the low tide, water circulation in this part of the Bay is limited, leading to low water regeneration and potentially strong accumulation of chemical contaminants such as PAHs in the sediments (Benlahcen et al, 1997;Misson et al, 2016;Wafo et al, 2016). To maintain a navigable water depth, harbor dredging is regularly required in accordance with the current legislation.…”

Section: Introductionmentioning

confidence: 99%

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Remobilization of polycyclic aromatic hydrocarbons and organic matter in seawater during sediment resuspension experiments from a polluted coastal environment: Insights from Toulon Bay (France)

Guigue

Tedetti

Dang

et al. 2017

Environmental Pollution

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Polycyclic aromatic hydrocarbons (PAHs) and organic matter contents were measured in seawater during resuspension experiments using sediments collected from Toulon Bay (Northwestern Mediterranean Sea, France). The studied sediments were very highly contaminated in PAHs, especially in 4-ring compounds emitted from combustion processes. The sediments used for resuspension experiments were collected at 0-2 cm (diagenetically new organic matter, OM) and 30-32 cm depths (diagenetically transformed OM). They were both mostly composed of fine particles (<63 μm), enriched in organic carbon (8.2 and 6.3%, respectively) and in PAHs (concentration of Σ34 PAHs: 38.2 and 35.7 × 10 ng g, respectively). The resuspension of these sediments led to an increase in concentrations of dissolved Σ34 PAHs, dissolved organic carbon (DOC) and dissolved humic- and tryptophan-like fluorophores in seawater up to 10-, 1.3-, 4.4- and 5.7-fold, respectively. The remobilization in seawater was higher for 4-6 ring PAHs, especially benzo(g,h,i)perylene, whose concentration exceeded the threshold values of the European Water Framework Directive. This noted the potential harmful effects of sediment resuspension on marine biota. From these sediment resuspension experiments, we determined OC-normalized partition coefficients of PAHs between sediment and water (K) and found that during such events, the transfer of PAHs from sediment particles to seawater was lower than that predicted from octanol-water partition coefficients (K) (i.e., measured K > K predicted from K). The results confirmed the sequestration role of sedimentary OC quality and grain size on PAHs; the OM diagenetic state seemed to impact the partition process but in a relatively minor way. Furthermore, differences were observed between 2-4 ring and 5-6 ring PAHs, with the latter displaying a relatively higher mobility towards seawater. These differences may be explained by the distribution of these two PAH pools within different OM moieties, such as humic substances and black carbon.

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Section: Contamination Levels and Origin Of Pahs In The Sediment Coresupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Remobilization of polycyclic aromatic hydrocarbons and organic matter in seawater during sediment resuspension experiments from a polluted coastal environment: Insights from Toulon Bay (France)

Guigue

Tedetti

Dang

et al. 2017

Environmental Pollution

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“…2015a; Misson et al. 2016) and for waters and sediments contaminated by oil spills (Bordenave et al. 2004a,b; Stauffert et al.…”

Section: Microbial Ecology Of Pah-polluted Marine Ecosystemsmentioning

confidence: 99%

Role of environmental factors and microorganisms in determining the fate of polycyclic aromatic hydrocarbons in the marine environment

Duran¹,

Cravo‐Laureau²

2016

FEMS Microbiology Reviews

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211

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Polycyclic aromatic hydrocarbons (PAHs) are widespread in marine ecosystems and originate from natural sources and anthropogenic activities. PAHs enter the marine environment in two main ways, corresponding to chronic pollution or acute pollution by oil spills. The global PAH fluxes in marine environments are controlled by the microbial degradation and the biological pump, which plays a role in particle settling and in sequestration through bioaccumulation. Due to their low water solubility and hydrophobic nature, PAHs tightly adhere to sediments leading to accumulation in coastal and deep sediments. Microbial assemblages play an important role in determining the fate of PAHs in water and sediments, supporting the functioning of biogeochemical cycles and the microbial loop. This review summarises the knowledge recently acquired in terms of both chronic and acute PAH pollution. The importance of the microbial ecology in PAH-polluted marine ecosystems is highlighted as well as the importance of gaining further in-depth knowledge of the environmental services provided by microorganisms.

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“…Moreover, the recent expansion of Cu-based marine antifouling coatings has led to an increase of the threat generated on non-targeted living organisms and, more broadly, of the overall Cu contamination of marine ecosystems. 9,10 Indeed, Cu enrichment factors in harbours can overpass 50-fold in the sediment 11 and superficial water. 12 The relationship between Cu contamination and boat traffic was evidenced.…”

Section: Introductionmentioning

confidence: 99%

Metabolomic and proteomic changes induced by growth inhibitory concentrations of copper in the biofilm-forming marine bacteriumPseudoalteromonas lipolytica

et al. 2019

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Chemical multi-contamination drives benthic prokaryotic diversity in the anthropized Toulon Bay

Cited by 62 publications

References 72 publications

Remobilization of polycyclic aromatic hydrocarbons and organic matter in seawater during sediment resuspension experiments from a polluted coastal environment: Insights from Toulon Bay (France)

Remobilization of polycyclic aromatic hydrocarbons and organic matter in seawater during sediment resuspension experiments from a polluted coastal environment: Insights from Toulon Bay (France)

Role of environmental factors and microorganisms in determining the fate of polycyclic aromatic hydrocarbons in the marine environment

Metabolomic and proteomic changes induced by growth inhibitory concentrations of copper in the biofilm-forming marine bacteriumPseudoalteromonas lipolytica

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