Shifts in the phytoplankton assemblage induced by environmental changes have significant implications for carbon cycling and marine food webs, but remain poorly constrained across spatiotemporal scales. Here, we investigate the effects of rising sea surface temperatures and increased stratification on the phytoplankton composition and size in Northwestern Mediterranean Sea (2010-2019) using two sediment trap series: one in the oligotrophic Liguri [...]
Advancing our understanding of single-year and multiyear El Niño events is essential for a better forecast of El Niños and assessment of their global socioeconomic impacts. Here, we compare these two types of El Niños in reanalysis and coupled model data. We further develop an approach in a linear continuously stratified ocean model to quantifying direct wind-driven (DWD) and boundary-reflected (BR) responses to wind stress forcing from the reana [...]
With more than 12 million inhabitants, the Greater Paris offers a “natural laboratory” to explore the effects of eutrophication on freshwater lake’s microbiomes within a relative restricted area (~ 70 km radius). Here, a 4-months survey was carried out during summertime to monitor planktonic microbial communities of nine lakes located around Paris (Île-de-France, France) of comparable morphologies, yet distinct trophic statuses from mesotrophic t [...]
Horizontal-axis turbines have been well-studied; however, there is a serious lack of information on the behaviour of vertical-axis turbines under unsteady operating conditions. Among unsteady flows, waves can cause significant mechanical fatigue and modify the flow downstream of the tidal turbines. Consequently, this paper aims to characterize the effects of waves on the hydrodynamic performance and wake development of a 1/20 scale model of a duc [...]
Understanding the spatial structure of life cycle components of small pelagic fish (SPF) stocks is key for deciphering population dynamics and ensuring sustainable management. The spatial extent of different life stages and ecologically relevant processes (e.g., reproduction) is temporally dynamic and responds to environmental, genetic, and demographic constraints. Knowledge gaps on within-stock spatial variability of key life cycle processes for [...]
Microbialites are organo‐sedimentary structures formed throughout most of the Earth history, over a wide range of geological contexts, and under a multitude of environmental conditions affecting their composition. The carbon and oxygen isotope records of carbonates, which are most often their main constituents, have been used as a widespread tool for paleoenvironmental reconstructions. However, the multiplicity of factors that influence microbial [...]
Tropical reef fishes exhibit a large disparity of organismal morphologies contributing to their astonishing biodiversity. Morphological disparity, scaling from differences among individuals within populations to differences among species, is governed by ecological and evolutionary processes. Here, we examined the relationship between intra- and interspecific disparity in 1111 individuals from 17 tropical reef fish species, representing 10 familie [...]
While a rich history of patchiness research has explored spatial structure in the ocean, there is no consensus over the controls on biological patchiness and how physical-ecological-biogeochemical processes and patchiness relate. The prevailing thought is that physics structures biology, but this has not been tested at basin scale with consistent in situ measurements. Here we use the slope of the relationship between variance vs spatial scale to [...]
This review revisits 20 years of collaborative studies that were pursued with Louis Bernatchez who sadly passed away in October 2023. With him, we explored the phenotypic plasticity of brook charr by combining ecophysiology, genetics, genomics, and more recently epigenetics. Over the years, we conducted extensive studies on brook charr, focusing on metabolism, stress response, growth regulation, and temperature tolerance across various strains. O [...]
Temporal population genetic studies have investigated evolutionary processes, but few have characterized reproductive system variation. Yet, temporal sampling may improve our understanding of reproductive system evolution through the assessment of the relative rates of selfing, outcrossing, and clonality. In this study, we focused on the monoicous, haploid‐diploid freshwater red alga Batrachospermum gelatinosum. This species has a perennial, micr [...]
Vertebrate nasal microbiota (NM) plays a key role regulating host olfaction, immunity, neuronal differentiation, and structuring the epithelium. However, little is known in fish. This study provides the first comprehensive analysis of the NM in two marine fish species, the European seabass and the Atlantic cod. Given its direct environmental exposure, fish NM is likely influenced by seawater fluctuations. We analysed the community structure, spec [...]
La génération et la complétion d’objets 3D représentent un défi transformateur dans le domaine de la vision par ordinateur. Notre étude explore l’utilisation des réseaux antagonistes génératifs (GANs) pour la génération etla complétion d’objets 3D scannés et fracturés. Notre approche s’appuie sur des GANs convolutifs 3D profonds (DCGANs) pour générer des modèles 3D de haute qualité et reconstruire des objets incomplets ou endommagés. En entraînan [...]
Most mélanges in exhumed subduction‐accretion complexes are polygenetic, recording significant information about the nature of geological processes during their formation. Here, we apply micro‐chemical analysis and illite K‐Ar dating to constrain the deformation mechanism and timing of the pervasively sheared scaly matrix in the accretionary complex rocks presently known as “Kenting Mélange” in the Hengchun Peninsula (South Taiwan). Our results r [...]
In riverine systems, particulate organic matter (POM) originates from various sources, each having its proper dynamics related to production, decomposition, transport and burial. There is a significant amount of spatiotemporal heterogeneity in the POM pool. The current study, based on C and N elemental and isotopic ratios, applies Bayesian mixing models associated with statistical multivariate analyses to 1) quantify and examine relationships bet [...]
The North Brazil Current (NBC) rings are a key mechanism for interhemispheric water transport, facilitating the exchange between the South Atlantic Ocean and the North Atlantic. However, significant uncertainties persist regarding the total volume transported by these structures and the properties of the water masses they advect. In this study, we integrate high-resolution in situ observations from the EUREC4A-OA field experiment with satellite a [...]
The influence of forcing mechanisms on the variability of suspended sediments in an estuary is, for the first time, synoptically quantified over prevailing ('normal') conditions and extreme events. This study investigates the complex and non-linear influence of tides, river discharge, and winds on the variability of suspended sediments in the macrotidal Gironde Estuary, France. Employing a machine learning-based framework, we integrated high-freq [...]
In this study, a quantitative analysis is conducted to study the Southern Ocean temperature affinities of dinocysts during the Pliocene and Pleistocene in comparison to the present day. This is done to investigate whether dinocyst species maintain consistent environmental preferences over time, thereby assessing their reliability as a proxy for temperature. Two statistical analyses were performed in Python: the k-means clustering method and the i [...]
