Restauration de zones humides de tête de bassin versant - Programme de suivi des sites - Phytoremed/Restaur - Volet écotoxicologie - Rapport final
(pp. 39, 12/10/2026)
UR EABX, INRAE, RiverLy, INRAE, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, UB, CNRS, INRAE
Modification des régimes de sédimentation en rade de Brest en réponse aux pressions climatiques et humaines
(12/10/2026)
LUSAC, UNICAEN, NU, INTECHMER, Cnam, GEO-OCEAN, UBS, IFREMER, INSU - CNRS, UBO EPE, CNRS, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, SHOM, LEMAR, IRD, IFREMER, UBO EPE, CNRS
Simple physics-based rip current and shore-break wave hazard predictors for beaches in southwest
Sandy beaches are attractive yet potentially dangerous environments due to physical hazards in the surf zone. The most severe natural hazards are rip currents and shore-break waves, which form under varying wave, tide, and morphological conditions. This study introduces two simple, physics-based models to forecast channel rip current flow speed V and shore-break wave energy Esb. These models were applied to La Lette Blanche, a high-energy meso-macro-tidal beach in southwest France, where both hazards coexist. Lifeguard-perceived hazard data collected hourly from July to August 2022 during patrol hours (11 AM–7 PM) were used to calibrate the models. This data also informed a 5-level hazard scale, from 0 (no hazard) to 4 (maximum hazard). The models accurately predict hazard levels, accounting for tidal and wave influences. Requiring only basic beach morphology metrics, this approach offers a promising tool for forecasting surf-zone hazards on beaches with minimal morphological data and available wave forecasts.
(12/10/2026)
EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, UR ETTIS, INRAE, UR EABX, INRAE
Structural control of the hydrothermal system of the North-East Pyrénées (Corbières): Geothermal implications
We investigate the hydrothermal system located at the North of the Pyrenean front forming a low relief area in a sedimentary environment (from the Mouthoumet Massif to the Montagne d'Alaric, Eastern-Pyr & eacute;n & eacute;es). This region is structured by W-E oriented Pyrenean folds and thrusts, which are affected by a dense network of NE-SW oriented fault system along which 24 hydrothermal springs localizes (>15 degrees C). Thanks to the construction of three balanced cross-sections and field-work campaigns, we infer that the structures abovementioned govern the hydrothermal system for the following reasons: 1) the Devonian carbonate layer confined between phyllosilicate rich formations constitutes the main fractured and karstified reservoir, 2) Pyrenean folds allows the main reservoir to outcrop at anticlines reliefs, favouring water recharge, flow at depth and high water column within low dipping limbs and synclines, 3) the Oligo-Miocene normal faults cut the fold and thrust structures and the phyllosilicate rich layers, and form dilatant high dipping pathways favoring the overpressured hydrothermal fluids to outflow at topographic depressions. The relatively low topography of the recharge area suggest that spring temperature is mainly controlled by reservoir depth, and therefore the folded and thrusted structure of the Devonian unit. This understanding of the reservoir geology and hydrothermal system provides new knowledge useful for geothermal exploration in polyphased-tectonics sedimentary environment.
(Bulletin de la Société Géologique de France. vol. 196, n° 0037-9409, 12/10/2026)
EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, INSU - CNRS, CNRS, UA, UM, M2C, UNICAEN, NU, INSU - CNRS, UNIROUEN, NU, CNRS
History of the sedimentary regimes of the Aquitaine margin (Bay of Biscay, France) at the outlet of its main tributaries during the last millennium: a mirror of the North Atlantic and European climates
The present work is based on the analysis of two hemipelagic sequences collected off the two main fluvial tributaries that enter the southern Bay of Biscay along the Aquitaine margin: the Gironde estuary, for core JB7-ST3c retrieved from the West-Gironde mud patch; and the Adour river, for core MD03–2693 retrieved from the Capbreton canyon meanders. Their positioning, at the northern and southern edges of the Aquitaine shelf, not only allows us to obtain a synoptic view of the southern Bay of Biscay past oceanography, but, over the last thousand years covered by these archives, also provides access to key contextual elements related to local as well as global hydroclimatic forcings. This article focuses on the interpretation of the sedimentological signal based on key X-ray fluorescence (XRF) elemental profiles obtained along the cores, within the framework of coherent age models newly built for the two sequences. The consistency of the two records allows us to robustly relate the evolution of the XRF profiles to the hydroclimatic regime of the Bay of Biscay, and to compile and discuss a chronicle of the environmental events that have marked the sites. This is achieved through a regional scale analysis, encompassing synchronous occurrences on the proximate continent, complemented by a broader synoptic perspective within the context of the well-documented European and North Atlantic historical frames. This chronicle is pivotal in comprehending the correlation between continental and oceanic regimes along the Euro-Atlantic margin, in addition to their links to the climatic processes that govern the Northern Hemisphere region. Our results clearly discriminate specific climatic trends, highlighting the Medieval Warm Period, the Little Ice Age and the Current Warm Period as contrasted intervals. The climatic patterns identified during these specific phases are discussed in the light of recent advances in our knowledge of their modes of variability, and raise the question of teleconnections between the North Atlantic Oscillation, Atlantic sea-surface conditions and dynamics, together with atmospheric ones and especially storminess over Europe.
(Global and Planetary Change. vol. 255, n° 0921-8181, pp. 105039, 12/10/2026)
EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS
Être ou ne pas être l'échinoderme Ophioderma longicaudum (Bruzelius, 1805) tel est le point à vérifier dans l'extrême nord de sa distribution atlantique
Un court historique critique est présenté sur la dénomination de l'échinoderme Ophioderma longicaudum (Bruzelius, 1805) récemment revu sur les estrans des îles d'Oléron et de Ré après plus de 150 ans sans mention dans les pertuis Charentais. Cette dénomination est un édifiant cas d'école des difficultés de la taxinomie, dans le cas d'un complexe d'espèces aujourd'hui quasi résolu, louvoyant entre usages historiques, strictes applications du code de nomenclature zoologique et aléas de la diffusion de l'information scientifique. L'état actuel des connaissances sur O. longicaudum, espèce Atlanto-Méditerranéenne en expansion vers le nord, s'appuie sur une approche intégrative alliant histoire des sciences, morphologie, biologie de la reproduction et génétique. En attente de validations génétiques, comme établies pour la baie d'Arcachon et la côte Basque, les nombreuses populations du Nord Gascogne jusqu'en Manche devraient être dénommées Ophioderma cf. longicaudum.
(Annales de la Société des Sciences naturelles de Charente-Maritime. vol. 11, n° 0373-9929, pp. 889-910, 12/10/2026)
LIENSs, INSU - CNRS, ULR, CNRS, SSNCM, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS
Greenland climate records from ice core isotopes
Decades of ice core research have resulted in unique isotopic data documenting changes in Greenland temperature and ice sheet evolution over the last 130,000 years. We present here a brief overview of the ice core drilling history in Greenland, the progress in the development of deep ice cores chronologies and how Greenland ice cores can bring information on past climate variations from the Last Interglacial to the last millennium and present day, including rapid variations like Dansgaard-Oeschger events. The evolution of the Greenland ice sheet in relation with the global climate system is also investigated.
(. vol. Volume 3, pp. 276-287, 12/10/2026)
EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS
Long-term impact of embryonic exposure to ethinylestradiol and clotrimazole on behavior and neuroplasticity in zebrafish (Danio rerio)
Estrogen receptors (ER) are widely expressed in the brain of many species and experimental results highlighted the role of estradiol in neuronal plasticity and behavior. Consequently, the brain is therefore a prime target for endocrine disrupting chemicals (EDCs) interacting with estrogen signaling. Very little is known about the late effects of early disruption of estrogen signaling by EDCs. We focused on: ethinylestradiol (EE2; ER agonist) and clotrimazole (inhibitor of key steroidogenesis enzymes, including aromatases). Zebrafish eleutheroembryos were exposed (0-5 days) and then raised normally until adulthood. Several behavioral tests were performed in adults, then cell proliferation and dopaminergic neurons were quantified in several brain regions using immunostaining. Overall, a developmental exposure to EDCs stimulates cell proliferation in the dorsal telencephalon. At environmentally-relevant concentrations, male fish exposed to EE2 exhibited increased activity levels and decreased social behavior, posing a potential risk to population balance and health.
(Environmental Toxicology and Pharmacology. vol. 113, n° 1382-6689, pp. 104592, 12/10/2026)
UMR MARBEC, IRD, IFREMER, CNRS, UM, Irset, UA, UR, EHESP, INSERM, Biosit : Biologie - Santé - Innovation Technologique, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, INERIS, SFR UMS CNRS 3480 - INSERM 018, UR, INSERM, CNRS, Biosit : Biologie - Santé - Innovation Technologique, ImPACcell, Biosit : Biologie - Santé - Innovation Technologique
Motorboat noise increases aggregation and alters gaping and filtration behaviors in the invasive quagga mussel
The response of invasive species to noise and how it can modulate their behavior and ecological impact have received scant attention. We conducted a two-phase laboratory experiment to investigate the effect of motorboat noise on the quagga mussel, Dreissena rostriformis bugensis. We first measured aggregation during a prolonged rearing phase under laboratory background noise supplemented or not with motorboat sounds. We then monitored valve gaping and estimated the filtration rate of mussels in the presence or absence of motorboat noise. Prolonged noise exposure increased aggregation and valve gaping. The relationship between valve gaping and filtration was significantly positive for control mussels and not significant for the mussels that experienced motorboat noise. Further research is needed to understand the physiological origins of the response to noise and the consequences on life-history traits and mussel-based ecosystem processes such as phytoplanktonic primary production, benthification and biofouling.
(Biological Invasions. vol. 27, n° 1387-3547, pp. 15, 12/10/2026)
CRNL-ENES, CRNL, UCBL, UJM, UJM EPE, INSERM, CNRS, BVPAM, UJM, UJM EPE, CNRS, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, ENES, UJM, UJM EPE, CRNL, UCBL, UJM, UJM EPE, INSERM, CNRS, CARRTEL, USMB [Université de Savoie] [Université de Chambéry], INRAE, Fédération OSUG, UJM FST, UJM, UJM EPE, INSERM
The spread of Aoroides longimerus Ren & Zheng, 1996 across the Mediterranean and the Atlantic: genetic diversity, anthropogenic transport, and ecological implications
Accurate knowledge of the global distribution of non-indigenous species (NIS) is essential for understanding their invasion dynamics and for implementing timely management measures. This study reports the first records of the marine amphipod Aoroides longimerus, putatively native to the East Asian coast, in Italy (2018), Spain (2019) and Tunisia (2022) and provides the earliest documented record of the species in its introduced European range (Portugal, 2011). Furthermore, it expands the species' known distribution in mainland Portugal (including the northernmost record), Macaronesia (with first records in the Canary Islands and Madeira), and confirms its presence along the Atlantic coasts of France and the Netherlands. Aquaculture facilities, particularly those associated with oyster farming, are probably the primary vector of introduction, while recreational boating may have contributed significantly to secondary dispersal. In comparison to other exotic amphipods, A. longimerus remains absent from many marinas, ports and/or aquaculture facilities in the Mediterranean Sea and adjacent regions, such as the Red Sea. This suggests that the species may still be in the early stages of expansion, or that its dispersal ability across marinas and ports is more limited than that of other amphipods. The present study, however, highlights several key ecological traits of A. longimerus: (i) it can survive year-round despite seasonal fluctuations, and reach high local densities, (ii) it exhibits strong colonisation capacity, as shown by its rapid establishment on settlement plates, and (iii) it displays opportunistic feeding behaviour, primarily consuming detritus. These characteristics underscore the importance of continuous surveillance and effective communication with stakeholders to prevent further expansion of this species.
(Mediterranean Marine Science. vol. 26, n° 1108-393X, pp. 842 - 859, 12/10/2026)
M2C, UNICAEN, NU, INSU - CNRS, UNIROUEN, NU, CNRS, IUEM, IRD, INSU - CNRS, UBO EPE, CNRS, LEMAR, IRD, IFREMER, UBO EPE, CNRS, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, AD2M, SU, CNRS, SBR, SU, CNRS, SBR, SU, CNRS, STAMAR, INSU - CNRS, SU, CNRS, FR2424, SBR, SU, CNRS, UMR ISEM, Cirad, IRD, EPHE, PSL, CNRS, UM, ISYEB, MNHN, EPHE, PSL, SU, CNRS, UA