Carte 14. Salle Hillaire (Partie sud)
This first volume of Monographie de la grotte Chauvet-Pont d’Arc presents a reasoned inventory of the information contained in the cave in the form of an atlas. While this type of publication may seem unusual, the dimensions of the cave, the morphology of the chambers and galleries that compart-mentalize its space, as well as the inscription of artworks in its underground landscape, are all invitations to reflect upon, study and structure our knowledge of the cave using a cartographic approach. The progressive presentation of the Atlas de la grotte Chauvet-Pont d’Arc enables us to address, in the most neutral manner possible, the complexity and factual richness, often emphasized, of this underground sanctuary.The proposed itinerary, close to that of the current path of the walkways from the entrance to the end of the cavity, invites us to discover the cave via twenty maps extracted from the integrated map of the cave floors. Moving through the cave and into its smallest and most intimate spaces, each person can shape their reading according to their interests. The visit to each of the twenty zones is organized according to the same narrative structure. The first page, accompa-nied by a panoramic photograph, presents the main charac-teristics of the zone and the themes that will be addressed. Depending on the sectors, the archaeology, paleontology, geology, speleogenesis or underground landscape is empha-sized. The second and third pages are positioned opposite each other and are designed to interact. The second page presents the integrated map reproduced at the 1:100 scale. Below it, a thumbnail representation enables the reader to identify the location of the map within the cave. A small map at the 1:300 scale presents the cave floor in 3D and shows the location, feature and artwork designations, the permanent and temporary paths installed for observations, as well as the camera angles and the position of the longitudinal profile of the zone. A synoptic figure shows the relative representation of each of the research domains in the map zone. The pages that follow provide an initial synthesis of the observations and research in progress. These aspects will be presented in detail in the succeeding volumes of the Atlas de la grotte Chauvet-Pont d’Arc.
(. vol. 1, pp. 249-254, 22/06/2026)
TRACES, EHESS, UT2J, Comue de Toulouse, MCC, Inrap, CNRS, MCC, LGL-TPE, ENS de Lyon, UCBL, INSU - CNRS, UJM, UJM EPE, CNRS, PACEA, UB, CNRS, LAMPEA, AMU, CNRS, MC, MSHS-T, CNRS, Comue de Toulouse, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS
SESAM mode-locked Tm:LuYO 3 ceramic laser generating 54-fs pulses at 2048 nm
(Applied optics. vol. 59, n° 1559-128X, pp. 10493, 22/06/2026)
JSNU, HNU, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, CIMAP - UMR 6252, UNICAEN, NU, IRAMIS, CEA, ENSICAEN, NU, CNRS, IRMA, UNICAEN, NU, ENSICAEN, NU, CEA, UNIROUEN, NU, INSA Rouen Normandie, INSA, NU, CNRS
Study of the dissolved organic matter (DOM) of the Auzon cut-off meander (Allier River, France) by spectral and photoreactivity approaches
Wetlands are recognized for the importance of their hydrological function and biodiversity, and there is now a consensus to protect and restore them as well as to complete the knowledge on their functioning. Here, we studied the dissolved organic matter (DOM) of a wetland composed of the Auzon cutoff meander, the Allier River, the alluvial fluvial flow, and watershed aquifer. Water was sampled at different locations, in spring, summer, and autumn. For each sample, DOM was characterized for its chemical and optical properties and its photooxidant capacity through its ability to generate DOM triplet excited states (3 DOM*) and singlet oxygen upon simulated solar light exposure. UV-visible and fluorescence indices revealed that DOM was mainly microbial-derived whatever the sampling sites with spatial and temporal variations in terms of aromaticity (5.5-22%), specific UV absorbance at 254 nm (0.28-2.82 L m −1 mgC −1), ratio of the absorbance at 254 and 365 nm (4.6-10.8), fluorescence index (1.35-166), and biological index (0.812-2.25). All the samples generated 3 DOM* and singlet oxygen, rates of formation of which showed parallel variations. Using principal component analysis (PCA), we found positive correlations between the sensitizing properties of DOM samples and parameters associated to the abundance of low molecular weight and low absorbing chromophores. Moreover, the parameter variation across the wetland reinforced the hydrological movements observed in a previous study, suggesting that these parameters could be used as water connection tracers.
(Environmental Science and Pollution Research. vol. 27, n° 0944-1344, pp. 26385-26394, 22/06/2026)
ICCF, SIGMA Clermont, INC-CNRS, UCA [2017-2020], CNRS, GEOLAB, UBP, IR SHS UNILIM, UNILIM, UCA [2017-2020], CNRS, UCA, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS
Lidar Observations of the Swash Zone of a Low-Tide Terraced Tropical Beach under Variable Wave Conditions: The Nha Trang (Vietnam) COASTVAR Experiment
(Journal of Marine Science and Engineering, n° 2077-1312, 22/06/2026)
LEGOS, IRD, UT3, Comue de Toulouse, INSU - CNRS, CNES, CNRS, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, LGO, UBS, IFREMER, UBO EPE, CNRS, LEESA, UB, CNRS, HCMUT, VNU-HCM, LGL-TPE, ENS de Lyon, UCBL, INSU - CNRS, UJM, UJM EPE, CNRS
On the small‐scale fractal geometrical structure of a living coral reef barrier
Topographical complexity of coral reefs is of primary importance for a number of hydrodynamical and ecological processes. The present study is based on a series of high‐resolution seabottom elevation measurements along the Maupiti barrier reef, French Polynesia. Several statistical metrics and spectral analysis are used to characterize the spatial evolution of the coral geometrical structure from the reef crest to the backreef. A consistent fractal‐like power law exists in the spectral density of bottom elevation for length‐scales between 0.1 and 7m while, at larger scale, the reef structure shows a different pattern. Such a fine characterization of the reef geometrical structure provides key elements to reconstruct the reef history, to improve the representation of reef roughness in hydrodynamical models and to monitor the evolution of coral reef systems in the global change context.
(Earth Surface Processes and Landforms. vol. 45, n° 0197-9337, pp. 3042-3054, 22/06/2026)
SIAME, UPPA, MIO, IRD, AMU, INSU - CNRS, UTLN, CNRS, INSU - CNRS, UM, CNRS, UA, CEREGE, IRD, AMU, CdF (institution), INSU - CNRS, CNRS, INRAE, IMAGES-Espace DEV, IRD, UPVD, AU, UR, UM, UG, UA, IMAG, UM, CNRS, UM, CNRS, LEMON, Inria, IMAG, UM, CNRS, HSM, IRD, INSU - CNRS, UM, CNRS, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, LabEX CORAIL, IRD, EHESS, EPHE, PSL, IFREMER, UR, UPF, UNC, UA
The sediment-fill of Pago Pago Bay (Tutuila Island, American Samoa): New insights on the sediment record of past tsunamis
Extensive bathymetric and two-dimensional seismic surveys have been carried out and cores collected in Pago Pago Bay (Tutuila, American Samoa) in order to describe and gain a better understanding of the sediment fill of the bay, which was affected by the 2009 South Pacific Tsunami. Eight sedimentary units were identified over the volcanic bedrock. The basal transgressive unit displays retrograding onlaps towards the shore, whereas the overlying seven aggradational layers alternate between four draping units and three pinching out seaward units. 'Core to seismic' correlation reveals that draping units are composed of homogeneous silts, while pinching out units are dominated by very coarse coral fragments showing fresh cuts, mixed with Halimeda plates. The basal unit is attributed to transgressive sedimentation in response to flooding of the bay after the last glacial maximum, followed by the upper aggrada-tional units corresponding to highstand sedimentation. The changeovers in these upper units indicate an alternation between low-energy silt units and high-energy coral debris units interpreted as tsunami-induced deposits. The 14 C dating reveals that high-energy sedimentation units can last up to approximately 2000 years while low-energy sedimentation units can last up to approximately 1000 years. This alternation, deposited during the last high-stand, may be explained by cycles of tectonic activity and quiescence of the Tonga Trench subduction, which is the main source of tsunamigenic earthquakes impacting the Samoan archipelago. In the uppermost silt unit, only the geochemical signature of the terrestrial input of the 2009 SPT backwash deposits was detected between 7 cm and 9 cm depth. Hence, Pago Pago Bay offers a unique sediment record of Holocene bay-fill under the impact of past tsunamis intermittently during the last 7000 years.
(Sedimentology, n° 0037-0746, 22/06/2026)
LIENSs, INSU - CNRS, ULR, CNRS, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, UNSW
Foraminiferal community response to seasonal anoxia in Lake Grevelingen (the Netherlands)
Over the last decades, hypoxia in marine coastal environments has become more and more widespread, prolonged and intense. Hypoxic events have large consequences for the functioning of benthic ecosystems. In severe cases, they may lead to complete anoxia and the presence of toxic sulfides in the sediment and bottom-water, thereby strongly affecting biological compartments of benthic marine ecosystems. Within these ecosystems, benthic foraminifera show a high diversity of ecological responses, with a wide range of adaptive life strategies. Some species are particularly resistant to hypoxia-anoxia, and consequently it is interesting to study the whole foraminiferal community as well as species-specific responses to such events. Here we investigated the temporal dynamics of living benthic foraminiferal communities (recognised by CellTracker™ Green) at two sites in the saltwater Lake Grevelingen in the Netherlands. These sites are subject to seasonal anoxia with different durations and are characterised by the presence of free sulfide (H 2 S) in the uppermost part of the sediment. Our results indicate that foraminiferal communities are impacted by the presence of H 2 S in their habitat, with a stronger response in the case of longer exposure times. At the deepest site (34 m), in summer 2012, 1 to 2 months of anoxia and free H 2 S in the surface sediment resulted in an almost complete disappearance of the foraminiferal community. Conversely, at the shallower site (23 m), where the duration of anoxia and free H 2 S was shorter (1 month or less), a dense foraminiferal community was found throughout the year except for a short period after the stressful event. Interestingly, at both sites, the foraminiferal community showed a delayed response to the onset of anoxia and free H 2 S, suggesting that the combination of anoxia and free H 2 S does not lead to increased mortality , but rather to strongly decreased reproduction rates. At the deepest site, where highly stressful conditions prevailed for 1 to 2 months, the recovery time of the community takes about half a year. In Lake Grevelingen, Elphidium selseyense and Elphidium magellanicum are much less affected by anoxia and free H 2 S than Ammonia sp. T6. We hypothesise that this is not due to a higher tolerance for H 2 S, but rather related to the seasonal availability of food sources, which could have been less suitable for Ammonia sp. T6 than for the elphidiids.
(Biogeosciences. vol. 17, n° 1726-4170, pp. 1415-1435, 22/06/2026)
LPG-ANGERS, LPG, UA, UN UFR ST, UN, INSU - CNRS, CNRS, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, LPG, UA, UN UFR ST, UN, INSU - CNRS, CNRS, NIOZ
Des concrétions fuligineuses en contextes archéologiques : quel potentiel informatif ?
Les spéléothèmes (concrétions carbonatées de grottes) sont des archives naturelles qui se caractérisent par leur capacité à enregistrer les environnements passés ainsi que par leur haute résolution temporelle, en particulier lorsqu’ils sont laminés annuellement. Leur potentiel d’étude ne se limite pas qu’aux recherches sur les reconstitutions paléo-climatiques. Les concrétions peuvent par exemple piéger des particules anthropiques comme de la suie, et ces concrétions fuligineuses ont un fort potentiel informatif en archéologie. Dans cet article, nous présenterons les potentiels d’application archéologique de l’analyse fuliginochronologique à travers plusieurs cas, dans des contextes temporels différents. Les cas les plus récents (en Belgique, en France et en Slovénie), pour lesquels nous disposons parfois d’informations historiques et textuelles autorisant un contrôle des faits archéologiques enregistrés, permettront de valider le potentiel d’archive micro-chronologique des spéléothèmes dans le cadre d’une étude fuliginochronologique. Ensuite, nous étendrons l’utilisation de cette méthode à un site paléolithique français afin de mettre en lumière le potentiel informatif de cette approche en préhistoire.
(Géomorphologie : relief, processus, environnement. vol. 26, n° 1266-5304, pp. 241-254, 22/06/2026)
UP1 UFR03, UP1, ArScAn, UP1, UP8, UPN, MCC, CNRS, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, LAMPEA, AMU, CNRS, MC, TRACES, EHESS, UT2J, Comue de Toulouse, MCC, Inrap, CNRS
Extreme Wave Events on Barrier Reefs: A Driver for Critical Regime?
This paper describes the hydrodynamic regimes reached over barrier reefs during extreme wave events. The study is based on a combined approach relying, on one hand, on an extensive in-situ experiment over the Ouano reef-lagoon system, New Caledonia and, on the other hand, on wave-resolving numerical modeling.
(Journal of Coastal Research. vol. 95, n° 0749-0208, pp. 654-658, 22/06/2026)
SIAME, UPPA, MIO, IRD, AMU, INSU - CNRS, UTLN, CNRS, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, INSU - CNRS, UM, CNRS, UA, LOPS, IRD, IFREMER, INSU - CNRS, UBO EPE, CNRS
Estrogenic activity of surface waters using zebrafish- and human-based in vitro assays : The Danube as a case-study
Most in vitro reporter gene assays used to assess estrogenic contamination are based on human estrogen receptor α (hERα) activation. However, fish bioassays can have distinct response to estrogenic chemicals and mixtures, questioning the relevance of human-based bioassays for assessing risk to this species. In this study, zebrafish liver cells stably expressing zebrafish ERβ2 (ZELHβ2) and human breast cancer cells expressing hERα (MELN) were used to quantify the estrogenic activity of 25 surface water samples of the Danube River, for which chemicals have been previously quantified. Most samples had a low estrogenic activity below 0.1 ng/L 17β-estradiol-equivalents that was more often detected by MELN cells, while ZELHβ2 response tend to be lower than predicted based on the chemicals identified. Nevertheless, both bioassays quantified well a higher estrogenic activity at two sites, which was confirmed in vivo using a transgenic zebrafish assay. The results are discussed considering the effect-based trigger values proposed for water quality monitoring.
(Environmental Toxicology and Pharmacology. vol. 78, n° 1382-6689, pp. art. 103401, 22/06/2026)
SEBIO, INERIS, URCA, ULH, NU, URCA, CNRS, EPOC, EPHE, PSL, UB, INSU - CNRS, CNRS, INERIS, LPTC, UB, CNRS, UFZ, RWTH Aachen