Occurrence and distribution of hydrocarbons in the surface microlayer and subsurface water from the urban coastal marine area off Marseilles, Northwestern Mediterranean Sea

Guigue, Catherine; Tedetti, Marc; Giorgi, Sébastien; Goutx, Madeleine

doi:10.1016/j.marpolbul.2011.09.013

Cited by 49 publications

(44 citation statements)

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“…consumption, as observed in other marine environments (Cincinelli et al, 2001;Guigue et al, 2011;Santos et al, 2011). The major carbon source found in both layers was α-olefins.…”

Section: Sml Organic Enrichmentsupporting

confidence: 64%

The Impact of Dry Atmospheric Deposition on the Sea-Surface Microlayer in the SE Mediterranean Sea: An Experimental Approach

et al. 2016

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The oligotrophic southeastern Mediterranean Sea (SEMS) is frequently exposed to desert-dust deposition which supplies nutrients, trace metals and a wide array of viable airborne microorganisms. In this study, we experimentally examined the impact of aerosol addition, collected during an intense dust storm event in early September 2015, on the biomass and activity of pico-phytoplankton and heterotrophic bacterial populations at the sea-surface micro layer (SML) relative to the sub surface layer (SSL). Aerosol (1.5 mg L −1 ) was added to SML and SSL water samples in microcosms (4.5 L) and the water was frequently sampled over a period of 48 h. While the aerosol amendment triggered a moderate 1.5-2-fold increase in primary production in both the SML and the SSL, bacterial production increased by ∼3 and ∼7-folds in the SSL and SML, respectively. Concurrently, the abundance and flow-cytometric characteristics (green fluorescence and side scatter signals) of high nucleic acid (HNA) and low nucleic acid (LNA) bacterial cells showed a significant increase in the %HNA, in both SML and SSL samples following aerosol amendment. This shift in nucleic acid content took place at a much faster rate in the SML, suggesting a more active heterotrophic community. These changes were likely a result of higher rates of carbon utilizations in the SML following the dust addition, as assessed by a selected hydrocarbons and saccharides analysis. Additionally, a high absorption rate of hydrocarbons by the aerosol particles was measured following the additions, leaving less than 10% of these molecules available for potential heterotrophic microbial utilization. Our results suggest that the heterotrophic microbial community inhabiting the SML is more efficient in utilizing aerosol associated constituents than the community in the SSL.

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“…consumption, as observed in other marine environments (Cincinelli et al, 2001;Guigue et al, 2011;Santos et al, 2011). The major carbon source found in both layers was α-olefins.…”

Section: Sml Organic Enrichmentsupporting

confidence: 64%

The Impact of Dry Atmospheric Deposition on the Sea-Surface Microlayer in the SE Mediterranean Sea: An Experimental Approach

et al. 2016

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“…These are in the same range than the concentrations of dissolved Phe (non-methylated + methylated) determined by GC-MS in the open Mediterranean Sea (0.4-4 ng L −1 ; Berrojalbiz et al, 2011) and in the coastal Mediterranean Sea (i.e., Bay of Marseille, 5-50 ng L −1 ; Guigue et al, 2011Guigue et al, , 2014.…”

Section: Confidence In Minifluo Measurementssupporting

confidence: 54%

“…A recent study estimated an atmospheric input of PAH in the ocean of about 0.09 Tg per month, equivalent to ∼15% of the oceanic CO 2 uptake (González-Gaya et al, 2016). Measurements of dissolved PAHs in the Mediterranean basin is specially of interest, since only few studies have focused on their distribution in this semienclosed and highly populated basin (Berrojalbiz et al, 2011;Guigue et al, 2011Guigue et al, , 2014. To the best of our knowledge, this study presents the first glider observations of these DOM fluorophores.…”

Section: Introductionmentioning

confidence: 86%

“…Oils/petroleum present in seawater contain a significant amount of methylated hydrocarbons (Wang et al, 1999;Guigue et al, 2011;Adhikari et al, 2015), which are generally more fluorescent than the non-methylated parent hydrocarbons . For the detection of hydrocarbons in seawater, a calibration conducted with the WAF (including methylated and nonmethylated Phe) is thus more representative than a calibration based only on a standard of non-methylated Phe.…”

Section: Calibrationmentioning

confidence: 99%

“…The underlying water was then stirred with a magnetic stirrer for a minimum of 36 h. The water under the crude oil micro layer is considered the WAF. The calibration of the MiniFluo was accomplished by comparing C RU output for several dilutions of WAF in seawater (25, 12.5, 6, 3, and 1.5%) with the "Phes" (methylated and non-methylated) concentrations determined by gas chromatography/mass spectrometry (GC/MS) according to Guigue et al (2011Guigue et al ( , 2014. WAF scale factors were calculated by linear fitting in the range 0.0009 − 0.22 µg L −1 (information provided in sensor calibration sheet).…”

Section: Calibrationmentioning

confidence: 99%

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A New Glider-Compatible Optical Sensor for Dissolved Organic Matter Measurements: Test Case from the NW Mediterranean Sea

Cyr

Tedetti

Besson³

et al. 2017

Front. Mar. Sci.

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The MiniFluo-UV is a new glider-compatible optical sensor for measurements of dissolved organic matter (DOM) in natural waters. The working principle, sensor design and challenges faced during the validation phase are reported. The first in situ application of the sensor during three glider deployments in the NW Mediterranean sea (spring, summer, and fall) are also presented. For these campaigns, the two channels of the sensor were adjusted to target Tryptophan-like (excitation/emission wavelengths λ Ex /λ Em : 275/340 nm) and Phenanthrene-like (λ Ex /λ Em : 255/360 nm) fluorescence. These were chosen because they represent fluorophores of interest commonly found in seawater. While Tryptophan (an amino-acid believed to be a by-product of biological activity) is naturally found in the ocean, Phenanthrene (a polycyclic aromatic hydrocarbon) is mainly introduced in the environment by human activities. The addition of these variables to more common physical and biogeochemical glider measurements reveals new features of DOM dynamics in the Mediterranean Sea. For example, the temporal and spatial decoupling between Tryptophan-like and Chl-a fluorescence suggests that the former is not only a marker of phytoplankton activity, but could also give more subtle information on the microbial processes occurring. The identification of a Phenanthrene-like layer just below the pycnocline at all seasons also raises questions on the mechanisms driving its presence in the Mediterranean. Knowing that the role of ocean DOM on atmospheric carbon sequestration is becoming clearer, the high spatiotemporal resolution possible with this new sampling strategy may represents a key step toward our deep understanding of DOM dynamics and its role on the biological pump.

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Bioaccumulation, Detoxification, and Biological Macromolecular Damage of Benzo[a]pyrene in Exposure in Tissues and Subcellular Fractions of Scallop Chlamys farreri

Chen

Miao

et al. 2022

Enviro Toxic and Chemistry

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Because of the persistence and high toxicity of benzo[a]pyrene (B[a]P), the bioaccumulation and detoxification mechanisms of B[a]P have been studied extensively at the tissue level; but the data at the subcellular level in bivalves have not been reported. The present study was conducted to investigate the effects of B[a]P exposure on bioaccumulation, detoxification, and biomacromolecular damage in gills, digestive glands, and their subcellular fractions of the scallop Chlamys farreri. The subcellular fraction contains cytoplasm, mitochondria, microsome, nucleus, cell membrane, and overall organelle. The results demonstrated that B[a]P accumulation showed a clear time–dose effect. Based on the time‐dependent accumulation of B[a]P in subcellular fractions, we speculated that the intracellular migration order of B[a]P was cell membrane, organelle, and nucleus in turn. Considering the difference of B[a]P accumulation may be related to B[a]P metabolism, we have further confirmed that the activities of B[a]P metabolizing enzymes in scallop tissues and subcellular fractions were significantly tempted by B[a]P (p < 0.05), including 7‐ethoxyresorufin O‐deethylase (increased), glutathione‐S‐transferase (GST; decreased), and superoxide dismutase (increased). First, GST was detected in bivalve cytoplasm and microsome. Second, B[a]P exposure also caused biomacromolecules damage. The results demonstrated that mitochondria and microsome were more vulnerable to lipid peroxidation than cell membrane and nucleus. Taken together, the present study fills some of the gaps in our knowledge of the bioaccumulation and detoxification mechanisms of C. farreri exposed to B[a]P in subcellular fractions and deeply explores the transportation and the main metabolic and damage sites of polycyclic aromatic hydrocarbons (PAHs) in cells, which helped us to comprehensively understand the toxic mechanism of PAHs on bivalves. Environ Toxicol Chem 2022;41:2353–2364. © 2022 SETAC

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Occurrence and distribution of hydrocarbons in the surface microlayer and subsurface water from the urban coastal marine area off Marseilles, Northwestern Mediterranean Sea

Cited by 49 publications

References 50 publications

The Impact of Dry Atmospheric Deposition on the Sea-Surface Microlayer in the SE Mediterranean Sea: An Experimental Approach

The Impact of Dry Atmospheric Deposition on the Sea-Surface Microlayer in the SE Mediterranean Sea: An Experimental Approach

A New Glider-Compatible Optical Sensor for Dissolved Organic Matter Measurements: Test Case from the NW Mediterranean Sea

Bioaccumulation, Detoxification, and Biological Macromolecular Damage of Benzo[a]pyrene in Exposure in Tissues and Subcellular Fractions of Scallop Chlamys farreri

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