Hourly sound pressure magnitude data measured underwater on oyster tables during a one-year semi-controlled experiment
This dataset shows the hourly sound pressure magnitude data measured underwater on each oyster table (control and ALAN conditions, at the oyster's level) throughout the year of experiment for different frequencies (10 Hz, 20 Hz, 30 Hz, 40 Hz, 50 Hz, 60 Hz, 70 Hz, 80 Hz, 90 Hz, 100 Hz, 200 Hz, 300Hz, 400 Hz, 500 Hz, 600 Hz, and 700 Hz). The mean sound pressure magnitude is also presented for each condition. In the ALAN condition, data are missing from August 13, 2024, until the end of the experiment due to the failure of the hydrophone used.
(11/07/2026)
EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS
Hourly physicochemical parameters measured underwater on oyster tables during a one-year semi-controlled experiment
This dataset shows the hourly physicochemical parameters measured underwater throughout the year of the experiment. The temperature and water depth were measured on each oyster table (control and ALAN conditions, at the oyster's level), while the turbidity was measured only on the ALAN table, and conductivity and salinity were measured only on the control table.
(11/07/2026)
EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS
From fixed to transgressive dunes, the conditions and timing of the transition along the Aquitaine coast, France
Today most of the coastal dunes in temperate latitudes, especially in the northern hemisphere, are relatively stable. However, over the last decade, the Gironde coast, southwest France, has experienced substantial natural dune remobilization following a major marine erosion event. Annual, large-scale and highresolution, airborne LiDAR data and Satellite imagery (Sentinel-2) are combined to address the coastal dune morphological changes and establish relations with forcing and controlling factors (vegetation cover, geomorphological descriptors). Between 2014 and 2023, about 10 out of 85 km of the Gironde dunes have switched from fixed to transgressive state. The analysis showed that in the vast majority of the cases the dominant process involved was dune front cannibalism. However, there is considerable spatial and temporal variability along the coast, depending on the vegetation cover evolution, the amount of sediment remobilized and the morphological characteristics of the dunes (steepness of the front slope, width).
(11/07/2026)
BRGM, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS
Valve behavior of the oysters Crassostrea gigas and Ostrea edulis and physicochemical data measured during a one-year semi-controlled experiment testing the in situ impact of artificial light at night
Artificial light at night (ALAN) is a worldwide anthropogenic pressure altering the natural sun- and moonlight cycles, with putative impacts on organisms' biological rhythms, physiology, and fitness. Compared to terrestrial organisms, ALAN effects have been little studied in coastal ecosystems, despite their widespread exposure to ALAN. To help fill this gap, as part of the LUCIOLE project, we conducted a one-year in situ semi-controlled study to assess the ALAN impact on Crassostrea gigas and Ostrea edulis, two coastal and sessile oyster species likely exposed to ALAN. The experiment took place in the "île aux oiseaux" (44.7°, -1.18°) in Arcachon Bay (France) from December 2023 to November 2024. The experimental platform consisted of two oyster tables spaced 18 meters apart: one table for the control condition exposed to natural light and one table exposed to a continuous and realistic ALAN intensity (⁓10-6 µE/cm2/s; ⁓0.5 lx) using LED strips (white light). 16 individuals of each oyster's species were disposed on each table and were immersed underwater throughout the experiment. Their valve behavior was continuously measured during one year using the High-Frequency Non-Invasive (HFNI) valvometry. In addition to the oyster behavior, several physicochemical parameters were continuously measured underwater during the experiment: temperature, water depth, conductivity, salinity, turbidity, sound pressure magnitude, and light irradiance. This compilation of datasets gives an overview of all physicochemical parameters and behavioral data collected during this experiment.
(11/07/2026)
EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS
Underwater sound data, recorded during a 18-month in situ experiment in Helgoland, Germany
This dataset shows the hourly sound pressure magnitude data measured underwater throughout the 18 months of experiment (11th of May 2023 – 31st of August 2024) in Helgoland (Margate) for different frequencies (10 Hz, 20 Hz, 30 Hz, 40 Hz, 50 Hz, 60 Hz, 70 Hz, 80 Hz, 90 Hz, 100 Hz, 200 Hz, 300Hz, 400 Hz, 500 Hz, 600 Hz, and 700 Hz) recorded by the HFNI valvometer. The mean sound pressure magnitude is also presented. Missing data corresponds to the stop of recording of the valvometer.
(11/07/2026)
EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, AWI, AWI
Characterization of Organic Matter in Estuarine Wetlands: Mapping Biogeochemical Functions Using Remote Sensing Data
A study was conducted to examine the biogeochemical functions of wetlands in the Seine estuary (northwestern France). The research integrated remote sensing data with field data, including vegetation surveys and biogeochemical measurements. These measurements encompassed elemental analyses (organic carbon and nitrogen) and isotopic analyses (d¹³C and d¹5N) of soil and sediment organic matter. Furthermore, the analysis of dissolved organic matter in porewater was conducted using UV-Visible absorption and EEM fluorescence spectroscopy, while the measurement of enzymatic activities was performed using NAG and BG. An extensive multisource remote sensing work has been carried out across the entire study site to characterize variables measured from space, such as the different vegetation types, the periods of flooding, vegetation production, and humidity. A cross-referencing between these variables and field observations was conducted to assess the potential of remote sensing to retrieve the main ecosystem functions characteristics. This one-year biogeochemical monitoring study of contrasting wetlands in the Seine estuary, differing in vegetation, moisture, connectivity to the watercourse, and use, revealed spatial variations in organic matter characteristics, but very few seasonal variations. For the first time, a correlation matrix was established between biogeochemical field data and function indicators derived from satellite observations.
(pp. 1-2, 11/07/2026)
EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, ECOBIO, UR, INEE-CNRS, CNRS, CNRS, METIS, EPHE, PSL, INSU - CNRS, SU, CNRS, UMR TETIS, Cirad, CNRS, INRAE, LETG - Rennes, UBO EPE, UR2, LETG, UBO EPE, UR2, CNRS, Nantes Univ - IGARUN
A wave-resolving two-dimensional vertical Lagrangian approach to model microplastic transport in nearshore waters based on TrackMPD 3.0
Potentially acting as a source or a sink for plastic pollution to the open ocean, nearshore waters remain a challenging context for predicting the transport and deposition of plastic debris. In this study, we present an advanced modeling approach based on the SWASH wave model and the TrackMPD (v3.0) particle transport model to investigate the transport dynamics of floating and sinking microplastics in wave-dominated environments. This approach introduces novel features such as coupling with advanced turbulence models, simulating resuspension and bedload processes, implementing advanced settling and rising velocity formulations, and enabling parallel computation. The wave laboratory experiments conducted by Forsberg et al. (2020) were simulated to validate the model's ability to reproduce the transport of diverse microplastics (varying in density, shape, and size) along a comprehensive beach profile, capturing the whole water column. Our results underscore the robustness of the proposed model, showing good agreement with experimental data. High-density microplastics moved onshore near the bed, accumulating in proximity to the wave-breaking zone, while the distribution of low-density particles varied along the coastal profile depending on the particle properties. The study also sheds light on the primary mechanisms driving microplastic transport, such as Stokes drift, wave asymmetry, and settling/rising velocities. Sensitivity analyses on calibration parameters further confirm the robustness of the model results and the influence of these factors on transport patterns. This research establishes the SWASH–TrackMPD approach as a valuable tool, opening avenues for future studies to contextualize laboratory findings within the complexities of real-world nearshore environments and further refine our comprehension of microplastic dynamics across different beaches and wave-climate conditions.
(Geoscientific Model Development. vol. 18, n° 1991-9603, pp. 319-336, 11/07/2026)
EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, SIAME, UPPA, MIO, IRD, AMU, INSU - CNRS, UTLN, CNRS
Dynamics of low and high density microplastics in the world's largest choked coastal lagoon under contrasting meteoceanographic conditions
The contamination by plastic waste in aquatic environments has become a global issue, scientifically reported since 1970. The size and durability of microplastics (MPs, 1 μm > 5 mm) have made these debris widely distributed in aquatic environments. Despite various ongoing initiatives, there is a need to fill gaps in understanding how MPs are transported from their release sources to their final destinations. Therefore, understanding the distribution and dynamics of MPs in coastal areas, such as lagoons and estuaries, which are considered continental sources of MPs to the oceans, is essential to help fill these gaps and propose alternatives for managing what is the environmental problem of the century. In this context, this study aimed to assess the transport patterns of MPs in Patos Lagoon, the largest choked coastal lagoon in the world, considering contrasting meteoceanographic conditions in the system dynamics, such as wind and discharge. Using the hydrodynamic model TELEMAC-3D and the model for plastics particles TrackMPD, simulations were performed using a type of MP polymer (Polypropylene - PP). The simulations of MP transport considered advection, dispersion and the contribution of biofilm in increasing particle density (representing high-density microplastics). The results indicated a gradient of MPs retention from north to south, with higher concentrations of MPs occurring in the northern part of the system. The central region of the lagoon showed a greater tendency for MP export towards the southern region than retention. Meanwhile, the estuary region of Patos Lagoon exhibited a tendency for export of low-density MPs free of biofilm and retention of higher-density MPs, subject to the action of the Plastisphere. Additionally, based on the results obtained from density occurrence maps, it was possible to suggest potential accumulation areas of MPs throughout the lagoon system, reinforcing that the system can act as a sink in specific regions.
(Continental Shelf Research. vol. 285, n° 0278-4343, pp. 105396, 11/07/2026)
FURG, INRAE, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS
Reconstructing the Mid- to Late Holocene human-environments interactions in Cape Corsica (Corsica Island, Western Mediterranean) based on sedimentology, pollen analyses and geochemistry
This paper aims to reconstruct the interactions between human populations and their environment over the last 4500 years in Cape Corsica, a rocky peninsula situated on the northern edge of Corsica Island. During the Iron Age and Roman times, this region in the North Tyrrhenian Sea was at the crossroads of maritime trade routes, and was therefore recognized for its geostrategic position. However, little is known about its exact contribution in terms of natural resources exploitation and land use, nor regarding the general Late Holocene landscape evolution of the area. Three boreholes were drilled in three coastal lagoons situated on the eastern shore of Cape Corsica, at Biguglia, Meria and Macinaggio. To reconstruct the coastal landscape configuration together with vegetation history, land use and mineral extraction, laboratory work comprised granulometry, loss on ignition, pollen identification and elemental geochemistry. The chronostratigraphy is based on nine radiocarbon datings for all cores, and complementary 137Cs and 210Pb measurements were performed on the Meria core for recent chronology. For the northern edge of Cape Corsica, pollen results reveal that the highest human impacts on the vegetation composition were recorded during the Late Neolithic/Early Bronze Age, throughout Roman times, and in the Pisan-Genoese period, respectively. For all these periods, forest and maquis opening was observed to be coeval with cereal cultivation, thus revealing development of agriculture at the northern extremity of Cape Corsica. Conversely, the Middle to Final Bronze Age and pre-Christian era were characterized by a major recovery of the maquis and scarce evidence of land use. At Biguglia lagoon in the southern part of the peninsula, the vegetation composition for the last 1100 years reveals forest opening with moderate development of agriculture and, in the 10th Cent. CE., the connection between San Damiano Island and La Marana coastal barrier. In Cape Corsica, local contamination by mineral extraction (antimony in the form of stibine) is attested in the Meria valley during the known period of exploitation and also prior to this activity, possibly dating from the Genoese or the Corsican independence periods.
(Journal of Archaeological Science: Reports. vol. 62, n° 2352-409X, pp. 104985, 11/07/2026)
CEREGE, IRD, AMU, CdF (institution), INSU - CNRS, CNRS, INRAE, IPHES-CERCA, URV, ULiège, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS
Record of trace organic contaminants in a river sediment core: A fingerprint of regulatory changes?
This study reconstructs the historical deposition of 76 trace organic contaminants (TrOCs), comprising pharmaceuticals, pesticides, and per-and polyfluoroalkyl substances (PFAS), in a dated sediment core taken from a secondary channel of the Seine River downstream of the Paris conurbation. Sediment chronology, established through $^{210}$Pb and $^{137}$Cs radionuclide depth activities, spans the period from 1943 to 2022, providing a long-term record of anthropogenic influence on fluvial contamination. The vertical profiles of pharmaceutical residues reveal temporal patterns closely aligned with their respective dates of market introduction, followed by increasing concentrations and subsequent declines. Maximum TrOC sedimentary concentrations were observed during the 1980s, coinciding with incomplete wastewater collection coverage. A sharp decrease in concentrations post-2000 reflects significant improvements in wastewater collection and treatment infrastructure. For pesticides, sedimentary trends also correlate with usage history and regulatory actions, with detectable declines frequently preceding official bans, suggesting the influence of progressive restrictions or shifts in agricultural practices. In contrast, PFAS profiles display more complex dynamics: legacy compounds such as perfluorooctanesulfonic acid and its precursors peaked in the early 2000s, after which their decline was offset by the increasing presence of alternative substances (e.g., fluorotelomersulfonic acids, betaines), indicative of industrial substitution. Overall, sediment composition had a secondary influence on TrOC profiles, with external factors such as regulatory decisions and technological developments in wastewater treatment playing predominant roles. These findings underscore the utility of collecting and analyzing sedimentary archives for assessing the long-term effectiveness of environmental policies and for identifying persistent and emerging contaminants in riverine systems.
(Journal of Environmental Management. vol. 389, n° 0301-4797, pp. 126276, 11/07/2026)
METIS, EPHE, PSL, INSU - CNRS, SU, CNRS, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, LSCE, UVSQ, INSU - CNRS, CNRS, DRF (CEA), CEA, GEDI, LSCE, UVSQ, INSU - CNRS, CNRS, DRF (CEA), CEA, LEHNA, UCBL, ENTPE, CNRS