Anthropogenic land-based disturbances can cascade into the sea, altering coastal ecosystems over long timescales. Mining exemplifies this land-sea connectivity, yet its full environmental footprint is underestimated when marine impacts are overlooked. Here, we investigate long-term coastal changes associated with nickel mining using a paleoecological approach in New Caledonia. A 226-cm sediment core spanning ~1000 years was analysed, combining an [...]
Alexandrium minutum Halim, the generitype species of the toxigenic Alexandrium, was described from a 1958 bloom in the Eastern Harbour, Alexandria (Egypt), but has never been re‐examined with modern methods from the type locality. Here, we establish a monoclonal strain (TIO1796) by cyst germination from Alexandria's port sediment and a second strain (TIO1816) from plankton samples from the Gulf of Suez. Cell morphology of both cultured strains an [...]
The Gulf ecosystem health was of great concern after the explosion of the Deepwater Horizon oil platform (April 2010). After the spill, a large volume of oil trapped in the deep-sea plumes were transported offshore and to deep-water sediments, causing detrimental effects on the benthic fauna. In this study, the variability in nematode standing stock, structural and functional diversity has been investigated. Nematodes were collected in October 20 [...]
Les écosystèmes hydrothermaux profonds sont des environnements dynamiques caractérisés par de forts gradients physico-chimiques. Malgré leur importance écologique, les communautés méiofauniques y demeurent peu étudiées. Cette thèse analyse la biodiversité, la distribution spatiale et la résilience de la méiofaune du champ hydrothermal Lucky Strike (dorsale médio-atlantique) à partir d’une expérience de défaunation in situ menée sur deux ans dans [...]
Plastic pollution represents one of the most pervasive and persistent material signatures of the Anthropocene, yet its scientific characterization remains fragmented across material-, size-, and compartment-based classification schemes. Although operationally effective, these approaches fail to capture plastics as structured anthropogenic entities embedded within coupled human–Earth systems. Here, we introduce the Taxonomy-inspired Hierarchical C [...]
Gadolinium-based contrast agents (GBCAs) used in medical imaging have become emerging contaminants in surface water and groundwater worldwide, raising concerns regarding their presence in drinking water. We report here on the distribution of rare earth elements and yttrium (REY) in tap water across the Paris megacity (12 million inhabitants), the largest and most complex urban drinking water systems in Europe. Anthropogenic gadolinium (Gd) was d [...]
In his comment on our paper, Morley (2026) criticizes various aspects of our scenario of evolution of South-East Asia. We agree with some of the issues raised regarding the precise location of faults or the correspondence between faults in the model and geological features. We have adapted the model accordingly. We consider, however, that many of the remarks refer to details in fault mapping that do not jeopardise our simplified reconstructions. [...]
Serpentinization and magmatism weaken the lithosphere and facilitate mantle exhumation during magma-poor rifting and ultraslow seafloor spreading. However, the complex interplay and timing among these competing mechanisms along detachment faults remain poorly constrained. The International Ocean Discovery Program (IODP) Expedition 402 drilled an incipient oceanic basin in the Tyrrhenian Sea offshore Italy. Recovered cores consist of one sequence [...]
Vibrio europaeus is an important pathogen in shellfish aquaculture, yet its genomic diversity remains poorly understood. Here, we present the first comprehensive analysis of the V. europaeus pangenome, integrating genomic data from all strains available to date (n=39) sequenced specifically for this study. These were isolated from different aquaculture facilities (shellfish hatcheries) associated with mass mollusc mortalities from different geogr [...]
Ce document détaille les actions géomatiques réalisées pour la mission HERMINE3. Il décrit les méthodologies adoptées pour la préparation et la récupération des données géographiques acquises par les engins et outils mis en oeuvre pendant la campagne. Il s’adresse : - Aux géomaticiens (méthodologie et outils) - Aux utilisateurs des données SIG (qualité géographique de la donnée) - Aux développeurs des logiciels Ifremer (problème/solution de l’uti [...]
Pelagic copepods of the genus Acartia dominate many coastal ecosystems, yet their diversity and ecology remain poorly documented in West Africa. This study reports the first records of Acartia hudsonica and Acartia spinicauda along the southern coast of Cameroon and quantify their seasonal dynamics and environmental associations. Monthly surveys were conducted at 14 stations from May 2021 to January 2022, where zooplankton, temperature, salinity, [...]
In September 2017, Category-5,Hurricane Irma made landfall on the small islands of Barbuda and Saint Martin, causing exceptional and devastating storm surges. Understanding such extreme surges is essential for improving their forecast and designing effective risk management strategies. One of the main challenge for their accurate modelling lies in the strong uncertainties in the characterisation and representation of tropical cyclone (TC) atmosph [...]
This study investigates water sorption in poly(ethylene terephthalate) (PET) during hydrolytic degradation (up to 4 years of aging) above its glass transition temperature using dynamic vapour sorption. Unaged PET follows Henry’s law at low water activities and exhibits nonlinear behaviour at higher activities, well described by the modified Park model. Hydrolysis significantly increases water uptake. At low activities, the Henry’s coefficient inc [...]
Accurate modeling of exploited fishery stocks relies first and foremost on data quality. Among the biological parameters collected yearly for stock assessment purposes, sexual maturity is key when estimating variables such as the Spawning Stock Biomass or factors like maturity ogive or the size/age at first maturity of a fish stock. In the following paper, a method based on quantitative histology is used to determine the sexual maturity phase of [...]
Paleofire records represent a valuable resource for understanding long-term changes in biomass burning and fire activity, as well as their drivers. Furthermore, they offer a way to assess fire models under climatic conditions that differ from those prevalent in the contemporary era. However, further calibration studies are needed to refine the link between paleofire records and more detailed characteristics of paleofire regimes. In order to enhan [...]
The structure of oceanic lithosphere entering subduction zones exerts fundamental control on plate interface coupling, seismicity, and volatile cycling. At slow-spreading ridges, crustal accretion occurs along a continuum from magmatically robust to tectonically dominated modes, producing a structurally heterogeneous lithosphere whose architecture is commonly linked to ridge segmentation and fracture zones. However, the extent to which seafloor m [...]
A template-fit approach is often used to separate the Galactic dust emission and the cosmic infrared background (CIB) anisotropies in low column density regions using the observational fact that the 21,̊m cm H I H I line emission from neutral atomic hydrogen and dust are tightly correlated. However, in some regions with molecular hydrogen, diffuse ionised gas, and dark gas, the same approach fails to trace the excess Galactic dust emission. We de [...]
Since 2008, Mediterranean small pelagic fish populations, particularly sardines Sardina pilchardus, have shown shrinking and adult overmortality, likely driven by bottom-up processes. Although energy availability has declined, adults still invest heavily in reproduction, possibly at the expense of other traits such as maintenance, growth and survival. Such trade-offs may alter their immune status, making individuals more prone to diseases. Here, [...]
Coastal zones have experienced significant anthropogenic alteration, facilitating the spread of invasive alien species, such as Rugulopteryx okamurae in the Strait of Gibraltar, which colonises rocky bottoms and creates massive accumulations of biomass along coastlines. Marine macrophytes, macroalgae and seagrasses, can form beachcasts as part of their natural lifecycle. However, the increased frequency and abundance of R. okamurae beachcasts has [...]
