Additive modelling reveals spatiotemporal PCBs trends in marine sediments

Everaert, Gert; Laender, Frederik De; Deneudt, K.; Roose, Patrick; Mees, Jan; Goethals, Peter; Janssen, Colin R.

doi:10.1016/j.marpolbul.2014.01.002

Cited by 11 publications

(29 citation statements)

References 46 publications

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“…The Seine very likely contributed, together with the Thames and Rhine rivers, to the North Sea PCB pollution. Some recent works also showed that more local pollution, derived from small coastal rivers, apparently drives the PCB influx nowadays (Everaert et al, 2014;Nicolaus et al, 2015;Vandermarken et al, 2018).…”

Section: Current Specificmentioning

confidence: 99%

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Spatio-temporal assessment of the polychlorinated biphenyl (PCB) sediment contamination in four major French river corridors (1945–2018)

Dendievel

Mourier

Coynel

et al. 2020

Earth Syst. Sci. Data

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Abstract. Environmental pollution by polychlorinated biphenyls (PCBs) is a key cause for concern about river quality because of their low degradation rates leading to their accumulation in sediments and living organisms. An original interdisciplinary work was conducted 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 (sediment cores, bed and flood deposits, suspended particulate matter and dredged sediments). This dataset focused on the seven indicator PCBs and their sum (ΣPCBi) from 1945 to 2018 (nΣPCBi =1416). Special effort was put into 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 in ΣPCBi (up to 4 mg kg−1 dry weight, dw) and a sharp decrease in the 1980s on the Seine and Loire rivers and (2) increasing but moderate ΣPCBi 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, PCB emissions from urban and industrial areas or accidental events were significant in each river. Finally, when calculating specific flux, the Rhône exhibited the uppermost ΣPCBi load (up to 12 µgm-2yr-1 in 1977–1987), at least 25 % higher than those of the Seine and Loire rivers, while the Garonne showed a very low flux. In western Europe, we confirmed that the Rhône, Seine and Loire rivers contribute significantly to the PCB contamination of the seas, while French specific ΣPCBi fluxes are 2 orders of magnitude lower than those found in American or Asian rivers. The dataset is available at https://doi.org/10.1594/PANGAEA.904277 (Dendievel et al., 2019).

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Section: Current Specificmentioning

confidence: 99%

“…200 km UEA) and in the lower Eure valley (ca. 140 km UEA), with the long-term release of fine sediments from Paris and the upper catchment areas (Fisson et al, 2017;Gardes et al, 2020;Tubergue and Arthus-Bertrand, 2009). Maximum PCBi concentrations range from 0.5 to ca.…”

Section: Pcb Pollution Along the Studied Riversmentioning

confidence: 99%

Spatio-temporal assessment of the polychlorinated biphenyl (PCB) sediment contamination in four major French river corridors (1945–2018)

Dendievel

Mourier

Coynel

et al. 2020

Earth Syst. Sci. Data

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“…According to Tappin and Millward 460 (2015), the Seine River could be considered as a major source of micropollutants to the English Channel, supplying more than half of the PCBs fluxes (∑PCBi fluxes English Channel = 7.6 µg.m -2 .year -1 in the 1980s). The Seine River also very likely contributed, together with the Thames and Rhine rivers, to the North Sea PCB pollution until 1987; however some works also show that a more local pollution, derived from small coastal rivers, apparently controls current PCB influxes (Everaert et al, 2014;Nicolaus et al, 2015;Vandermarken et al, 2018). 465…”

Section: Specific ∑Pcbi Fluxes and Worldwide Comparisonmentioning

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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“…eight years (Figure 3), suggests the influence of the NAO on the PCB concentrations. Recently, Everaert et al 7 found an interannual oscillation of the PCB concentration in the sediments along the Belgian coast similar to the period of the NAO. Also at larger spatial scales, interannual fluctuations of POP concentrations were linked to climatic oscillations such as the el Ninõ southern oscillation (ENSO) and the NAO.…”

Section: Chlorophyll a And Organic Carbon Time Trendsmentioning

confidence: 78%

Multidecadal Field Data Support Intimate Links between Phytoplankton Dynamics and PCB Concentrations in Marine Sediments and Biota

Everaert

Laender

Goethals

et al. 2015

Environ. Sci. Technol.

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We analyzed three decades of field observations in the North Sea with additive models to infer spatiotemporal trends of chlorophyll a concentration, sediment organic carbon content, and polychlorinated biphenyls (PCBs) concentrations in mussels and sediments. By doing so, we separated long-term changes in PCB concentrations from seasonal variability. Using the inferred seasonal variability, we demonstrated that phytoplankton blooms in spring and autumn correspond to the annual maxima of the organic carbon content (r = 0.56; p = 0.004) and the PCB concentrations in sediments (r = 0.57; p = 0.004). Furthermore, we found a negative correlation between the PCB concentrations in sediments and in blue mussels (Mytilus edulis; r = -0.33, p = 0.012), which is probably related to the cleansing of the dissolved PCB phase driven by sinking organic matter during phytoplankton blooms and the filter-feeding behavior of the blue mussel. The present research demonstrates the role of seasonal phytoplankton dynamics in the environmental fate of PCBs at large spatiotemporal scales.

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Additive modelling reveals spatiotemporal PCBs trends in marine sediments

Cited by 11 publications

References 46 publications

Spatio-temporal assessment of the polychlorinated biphenyl (PCB) sediment contamination in four major French river corridors (1945–2018)

Spatio-temporal assessment of the polychlorinated biphenyl (PCB) sediment contamination in four major French river corridors (1945–2018)

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

Multidecadal Field Data Support Intimate Links between Phytoplankton Dynamics and PCB Concentrations in Marine Sediments and Biota

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