The English Channel: Contamination status of its transitional and coastal waters

Tappin, Alan D.; Millward, G.E.

doi:10.1016/j.marpolbul.2014.12.012

Cited by 36 publications

(14 citation statements)

References 101 publications

(137 reference statements)

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“…3-d). This pollution may have dispersed down to the estuary where PCB contents increased in mussels (Mytilus edulis) from 1995 to 2006 (Tappin and Millward, 2015). 410…”

Section: Spatio-temporal Distribution Of Pcbs In Each Basinmentioning

confidence: 99%

Spatio-temporal assessment of the PCB sediment contamination in the four main French River Basins (1945–2018)

Dendievel

Mourier

Coynel

et al. 2019

Preprint

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Abstract. Environmental pollution by Polychlorinated Biphenyls (PCBs) is a key concern about river quality because of their low degradation rates leading to their accumulation in sediments or living organisms. This original interdisciplinary work was conducted at a large scale along the four main French rivers (Seine, Rhône, Loire and Garonne Rivers), which flow into major European seas. We completed a dataset based on sediment analyses provided by monitoring agencies, port authorities and research teams on different solid matrices (cores, bed and flood sediments, suspended particulate matters, dredged sediments). This dataset (n=1416) focused on the seven indicator PCBs and their sum (∑PCBi) from 1945 to 2018. Special effort was put on the quality control to provide robust spatio-temporal information. Taking into account hydrological and human drivers, we outlined two main pollution trends: (1) from 1945 to 1975, a quick increase of ∑PCBi (up to 4 mg.kg−1 dry weight, dw) and a sharp decrease in the 1980s on the Seine and Loire Rivers; (2) increasing but moderate ∑PCBi levels (50 to 150 µg.kg−1 dw) followed by a decline after the 1990s on the Rhône and Garonne Rivers. In addition to these patterns, PCBs emissions from urban and industrial areas or accidental events were significant on each river. Finally, when calculating specific fluxes, the Rhône River exhibited the biggest ∑PCBi load (up to 12 µg.m−2.year−1 in 1977–1987), at least 25 % higher than those of the Seine and Loire Rivers, while the Garonne River showed very low fluxes. French specific ∑PCBi fluxes are two orders of magnitude lower than those found in American or Asian Rivers. In Europe, we confirmed that the Rhone and Seine Rivers provide a major supply of PCBi to the Western Mediterranean and the English Channel, respectively. The dataset is available at https://doi.pangaea.de/10.1594/PANGAEA.904277.

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“…3-d). This pollution may have dispersed down to the estuary where PCB contents increased in mussels (Mytilus edulis) from 1995 to 2006 (Tappin and Millward, 2015). 410…”

Section: Spatio-temporal Distribution Of Pcbs In Each Basinmentioning

confidence: 99%

Spatio-temporal assessment of the PCB sediment contamination in the four main French River Basins (1945–2018)

Dendievel

Mourier

Coynel

et al. 2019

Preprint

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“…3C, S2) by counteracting iron limitation of benzoate breakdown 105 . This scenario could be advantageous considering the anthropogenic input of benzoate in its original habitat 106 . The benzoate cluster is located in a genomic island 32 and flanked by a transposase, underlining the importance of flexible loci for phenotypic variability.…”

Section: Resultsmentioning

confidence: 99%

Genomic, metabolic and phenotypic variability shapes ecological differentiation and intraspecies interactions of Alteromonas macleodii

Koch

Germscheid

Freese

et al. 2020

Sci Rep

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Ecological differentiation between strains of bacterial species is shaped by genomic and metabolic variability. However, connecting genotypes to ecological niches remains a major challenge. Here, we linked bacterial geno-and phenotypes by contextualizing pangenomic, exometabolomic and physiological evidence in twelve strains of the marine bacterium Alteromonas macleodii, illuminating adaptive strategies of carbon metabolism, microbial interactions, cellular communication and iron acquisition. in A. macleodii strain MIT1002, secretion of amino acids and the unique capacity for phenol degradation may promote associations with Prochlorococcus cyanobacteria. Strain 83-1 and three novel Pacific isolates, featuring clonal genomes despite originating from distant locations, have profound abilities for algal polysaccharide utilization but without detrimental implications for Ecklonia macroalgae. Degradation of toluene and xylene, mediated via a plasmid syntenic to terrestrial Pseudomonas, was unique to strain EZ55. Benzoate degradation by strain EC673 related to a chromosomal gene cluster shared with the plasmid of A. mediterranea EC615, underlining that mobile genetic elements drive adaptations. Furthermore, we revealed strain-specific production of siderophores and homoserine lactones, with implications for nutrient acquisition and cellular communication. Phenotypic variability corresponded to different competitiveness in co-culture and geographic distribution, indicating linkages between intraspecific diversity, microbial interactions and biogeography. The finding of "ecological microdiversity" helps understanding the widespread occurrence of A. macleodii and contributes to the interpretation of bacterial niche specialization, population ecology and biogeochemical roles.

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“…The 54 year-long average water discharge at the estuary of the Canche River is ca. 21 m 3 s −1 [15]. For the needs of this study, water discharge at each sampling location was calculated on the basis of measurements of water discharge at three gauging stations located along the river course.…”

Section: The Canche River Catchmentmentioning

confidence: 99%

Transfer Pathways and Fluxes of Water-Soluble Pesticides in Various Compartments of the Agricultural Catchment of the Canche River (Northern France)

Belles

Alary

Rivière

et al. 2019

Water

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Five frequently used water-soluble pesticides (atrazine, diflufenican, metolachlor, pendimethalin, and ethofumesate) were monitored in surface water and groundwater of an agricultural catchment (Canche River) in Northern France for examining the edge-of-field pathways of substances and their characteristic time of transport. The study of surface water contamination was conducted in 2016 through two time scales: continuously over one year at a single location of the catchment and punctually during four seasons at 15 sampling locations along a longitudinal river profile. In addition, groundwater in winter and summer shows a generally low and relatively constant contamination level. Nevertheless, the outflow of pesticides from groundwater results in a background contamination of surface water. In addition to this, a contamination peak above the baseline level is observed in surface water subsequently to the period of substance application on the fields. Our results show that pesticides were essentially transported into the surface water by fast flow components (runoff water). Loss of pesticides during the contamination peak period and long-term monitoring were compared showing that the transport of substances within weeks after pesticides spreading dominates the annual flux of pesticides, except for atrazine which shows a constant background contamination pattern. Low frequency monitoring schemes provide only a partial picture of the contamination state and do not enable to evaluate the true contamination state of such rivers with regard to the fact that 3/4 of the annual load of pesticides are transported in the stream during only 2–3 months.

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The English Channel: Contamination status of its transitional and coastal waters

Cited by 36 publications

References 101 publications

Spatio-temporal assessment of the PCB sediment contamination in the four main French River Basins (1945–2018)

Spatio-temporal assessment of the PCB sediment contamination in the four main French River Basins (1945–2018)

Genomic, metabolic and phenotypic variability shapes ecological differentiation and intraspecies interactions of Alteromonas macleodii

Transfer Pathways and Fluxes of Water-Soluble Pesticides in Various Compartments of the Agricultural Catchment of the Canche River (Northern France)

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