The twin field experiments C-SWOT-2023 and WEMSWOT were carried out in March-April 2023 and aimed to support the new-generation SWOT altimeter (NASA/CNES) calibration and validation. This satellite provides a measurement of sea surface elevation and rugosity with unequalled space-time coverage, particularly during its intensive observation phase from March to June 2023. The originality of this field experiments is the mobilisation of two researc [...]
Understanding the environmental processes shaping connectivity can greatly improve management and conservation actions which are essential in the trailing edge of species’ distributions. In this study, we used a dataset built from 32 populations situated in the southern limit of the kelp speciesLaminaria digitata. By extracting data from 11 microsatellite markers, our aim was to (1) refine the analyses of population structure, (2) compare connect [...]
The Working Group on Ballast and Other Ship Vectors under the International Council for the Exploration of the Sea, Intergovernmental Oceanographic Commission of UNESCO, and Inter-national Maritime Organization (ICES/IOC/IMO WGBOSV) aims to provide scientific support to international decision-making to reduce the risk of spread and establishment of non-native spe-cies via maritime transport. The work contributes to ICES Strategic Plan by improvin [...]
Les microalgues, en tant que producteurs primaires, sont à la base des réseaux trophiques aquatiques : elles peuvent donc être directement impactées par les herbicides. Dans l’environnement aquatique, la matière organique dissoute (MOD) peut également influencer les microalgues. La présente étude avait pour but d’étudier l’impact de la MOD naturelle (provenant du Bassin d’Arcachon) sur la toxicité de trois herbicides (irgarol (I), diuron (D) et S [...]
Slopes adjacent to the Bahamian carbonate platform revealed a large variety of depositional processes. In this study, we present a synthesis summarizing 109,000 km2 of bathymetric and reflectivity data with ∼7,900 km of seismic lines and 311 m of sediment cores that were obtained over the last 50 years. These data are used to develop a conceptual model of sedimentation patterns on Quaternary carbonate slope systems and their interaction with the [...]
A limited understanding of foliar terpene emissions from different tree species is prominent in diverse tropical forests. We conducted a study in French Guiana, screening BVOC emissions from 36 tropical woody species. We focused on 32 species in the dry season and 33 in the wet season, documenting terpene emissions for the first time in some of these tree species. Our findings show that 93.8% emitted terpenes in the dry season, while only 33.3% d [...]
Fisheries science has been trying to identify the best way to analyze and predict fish biomass and its spatial distribution since several decades using, among others, kirigng model, co-kiriging model, Species Distribution Modeling and Joined Species Distribution Modeling, based on conventional statistical methods as Generalized Linear Models and Generalized Additive Models, with contested results. We consider a bio-ecological issue applying a non [...]
Drying across much of the Indo-Pacific Warm Pool (IPWP) during the Last Glacial Maximum (LGM) has been widely recognized from interpretations of sedimentological, geochemical, and paleoecological records. Reconstructions of precipitation isotopic compositions have emerged as a powerful tool to reconstruct rainfall amount in many tropical regions, yet it has proven difficult to reconcile precipitation isotope records from the IPWP with records of [...]
Microbialites are microbial sedimentary structures that constitute some of the oldest traces of life on Earth. By their deposition in a wide range of sedimentary environments and their presence throughout most of geological time, the sedimentological and geochemical signatures they preserve represent important paleoenvironmental archives for understanding Earth's biological and geochemical co-evolution. Here we present a large microbialite collec [...]
Le territoire de la Nouvelle-Calédonie (NC) comprend de nombreux affleurements naturels de minéraux pathogènes. La présence de ces affleurements amiantifères sur la majorité du territoire calédonien, génère une problématique majeure de santé publique en Nouvelle-Calédonie. Le projet SAFE avait pour objectif de contribuer à une meilleure connaissance de la capacité de dispersion des minéraux d’amiante ou amiantifères. Les résultats acquis au cours [...]
Molecular data from samples encompassing 22 nominal species of Poropuntius indicate that the species-level diversity in the genus has been vastly overestimated, likely due to inadequate taxon and geographic sampling and reliance on morphological characters that vary intra-specifically. The latter includes discrete mouth morphologies related to alternate feeding strategies (ecomorphs) within populations. One new species is described, Poropuntius a [...]
Coastal zones are biodiversity hotspots and deliver essential ecosystem functions and services, yet they are exposed to multiple and interacting anthropogenic and environmental constraints. The individual and cumulative effects of these constraints on benthic communities, a key component of coastal ecosystems, and their variability across space and time remains to be thoroughly quantified to guide conservation actions. Here, we explored how the p [...]
Dissolved concentrations of 14 Rare Earth Elements (dREE) were measured in seawater samples collected during the GEOVIDE cruise (GEOTRACES GA01, May–June 2014) in the North Atlantic. This is the first dREE dataset produced using the manually operated self-built preconcentration system, made of eight columns of Nobias chelate PA-1® resin (Hitachi High-Technologies) in parallel. Concentration profiles differ from the typical “nutrient-like” dREE ve [...]
The monosaccharide anhydrides levoglucosan, mannosan, and galactosan are known as ‘fire sugars’ as they are powerful proxies used to trace fire events. Despite their increasing use, their application is not completely understood, especially in the context of tracing past fire events using sediment samples. There are many uncertainties about fire sugar formation, partitioning, transport, complexation, and stability along all stages of the source-t [...]
