63328 résultat(s)
Vigneron Adrien, Cloarec Lilian a., Brochier-Armanet Céline, Flandrois Jean Pierre, Troussellier Marcexpand

Background Extreme environments are useful systems to investigate limits of life, microbial biogeography and ecology, and the adaptation and evolution of microbial lineages. Many novel microbial lineages have been discovered in extreme environments, especially from the Planctomycetota–Verrucomicrobiota–Chlamydiota (PVC) superphyla. However, their evolutionary history and roles in ecosystem functioning and microbiome assemblage are poorly understo [...]

In this study, we examined the impact of asbestos mining residues on the marine environment at the Canari site in Corsica. Over 20 years, sediment (20 sites), water (10 sites), and biota (394 samples) were analyzed for trace metals, using various methods including AAS and ICP-MS, and toxicity. Laser granulometry and radionuclide dating enabled to assess sediment characteristics and accumulation rates. The results reveal substantial metal contamin [...]

Daché Edwin, Zeppilli Daniela, Sarrazin Jozee, Singh Ravail, Baldrighi Elisaexpand

Here, we present the first comprehensive dataset of functional traits for marine nematodes (MarNemaFunDiv). In this study, we propose 16 functional traits (life strategy, body shape, trophic group, oesophageal bulb, cuticle complexity, adhesive structures and ambulatory setae, head shape, amphid (shape and size), sensory structures (head and rest of the body), light sensing, male reproductive system (spicule, pre/postcloacal supplements and guber [...]

Deep ocean circulation modulated glacial–interglacial climates through feedbacks to the carbon cycle and energy distribution. Past work has suggested that contraction of well-ventilated North Atlantic Deep Water during glacial times facilitated carbon storage in the deep ocean and drawdown of atmospheric CO2 levels. However, the spatial extent and properties of different water masses remain uncertain, in part due to conflicting palaeoceanographic [...]

Quezada-Escalona Felipe j., Tommasi Desiree, Kaplan Isaac c., Hernvann Pierre-Yves, Frawley Timothy h.expand

Small Pelagic Fish (SPF) exhibit large fluctuations in abundance and distribution in response to environmental variability. To maintain the resilience of fishing communities and develop effective and equitable climate adaptation strategies, improved understanding of how the fishing industry responds to spatio-temporal shifts within and across SPF populations is of critical importance. In this paper, we examine the responses of the fishing industr [...]

Gattacceca J., Gounelle M., Devouard B., Barrat J.‐a., Bonal L.expand

CI1 chondrites are rare meteorites with high scientific value. In fact, they are the most chemically primitive meteorites and show evidence of intense parent‐body aqueous alteration. They also share strong similarities with samples from Ryugu and Bennu asteroids returned by the JAXA Hayabusa2 and NASA's OSIRIS‐REx missions. In this work, we present a detailed study of the Oued Chebeika 002 meteorite, a ~420 g CI1 chondrite found in Morocco in 202 [...]

Lagarde Henri, Lallias Delphine, Phocas Florence, Goardon Lionel, Bideau Marjorieexpand

In the context of adaptation to climate change, acute hyperthermia and hypoxia resistance are traits of growing interest in aquaculture. The feasibility of genetic improvement of these resistance traits through selection has been demonstrated in rainbow trout (Oncorhynchus mykiss). The present paper aims to test whether behaviour may be associated with acute hyperthermia and hypoxia resistance to better characterize these resistance phenotypes. F [...]

Veillard Delphine, Beauclercq Stéphane, Ghafari Nathan, Arnold Alexandre a., Genard Bertrandexpand

Global anthropogenic oceanic noise caused by shipping is predicted to double every 11.5 yr, putting marine organisms at risk. While the impact of noise on marine mammals is well documented, its effects on molluscs, which hold immense economic and ecological importance, remain largely unknown. To investigate the consequences of noise on mollusc metabolism during crucial early life stages, blue mussel Mytilus edulis larvae were exposed to shipping [...]

Kergosien Nolwenn

La prolifération et échouements massifs de macroalgues brunes sur les littoraux français de l’Océan Atlantique sont des problématiques actuelles majeures ; leur valorisation industrielle pourrait apporter une solution économique à un problème écologique. Les espèces responsables de ces échouements appartiennent au genre Sargassum, avec S. muticum sur les côtes normandes, et S. natans et S. fluitans sur les côtes antillaises. Dans ce contexte, l'o [...]

Martin Nicolas, Simon Blanchet, Sophie Hermet, Larcher Thibaut, Romain Grosexpand

Anthropic activities often lead to the contamination of freshwater ecosystems by organic and inorganic pollutants with potential deleterious effects on wildlife health. However, some species such as the invasive mosquitofish (Gambusia holbrooki) can thrive in such polluted habitats, but the underpinning mechanisms are still unknown. The aim of this study was to characterize the physiological response of mosquitofish living along different polluti [...]

Floch Laurent, Cauquil Pascal, Depetris Mathieu, Duparc Antoine, Kaplan Davidexpand

Ce document présente un résumé actualisé de la flottille de senneurs français ciblant les thons tropicaux dans l’océan Atlantique. Les statistiques couvrent la période 1991-2020 et portent particulièrement sur les activités réalisées par la pêcherie au cours de la dernière année. En 2020, 9 senneurs français ont opéré dans l’océan Atlantique Est. La capacité totale pondérée par mois d’activité de chaque navire est de 9 401 t. L’effort nominal tot [...]

In France, the notion of “deep‐sea/deep‐seabed” (“grands fonds marins”) has emerged fairly recently in public policy discourse, and in particular in the wake of the 2009 Grenelle de la Mer, which marked the French government’s desire for an integrated maritime policy. The Grenelle de la Mer is a public process of reflection and negotiation between the French government, elected representatives, economic and professional stakeholders in maritime a [...]

Bongibault Baptiste, Godet Laurent, Morel Régis, Pasco Pierre-Yves, Bernez Ivanexpand

Aim While landscape anthropization is a key driver of biodiversity change, its effects on communities are underexplored, especially at regional scales. In the Anthropocene, climate and habitat diversity alone are insufficient to explain community structure. However, until recently, ecologists lacked accessible, synthesized data describing anthropization gradients, which limited studies to macro-ecological scales. Yet, a deeper understanding of ho [...]

L'inventaire cartographique des points de prélèvement REMI et des listes de zones classées et surveillées présente : - la position géographique de l'ensemble des points de prélèvement du réseau de contrôle microbiologique REMI (dispositif de surveillance régulière et dispositif d'alerte), échantillonnés à la date de révision du présent document; - les listes des zones classées et surveillées pour chaque laboratoire côtier DEL par département, ave [...]

L'inventaire cartographique des points de prélèvement REMI et des listes de zones classées et surveillées présente : - la position géographique de l'ensemble des points de prélèvement du réseau de contrôle microbiologique REMI (dispositif de surveillance régulière et dispositif d'alerte), échantillonnés à la date de révision du présent document; - les listes des zones classées et surveillées pour chaque laboratoire côtier DEL par département, ave [...]

Cold-smoked salmon (CSS) is highly susceptible to spoilage due to its processing and storage requirements. This study leverages a multi-omics approach to unravel the complex interactions between microbiota, biochemical changes, and sensory characteristics during the storage of CSS produced in three distinct processing plants. By integrating high-throughput metabarcoding, volatile organic compound (VOC) profiling, biochemical assays, and sensory e [...]

Le cahier des spécifications techniques et méthodologiques définit les principes généraux de la mise en oeuvre opérationnelle du réseau de contrôle microbiologique REMI, destiné à la surveillance des zones de production et de reparcage classées, qui comprend le dispositif de surveillance régulière et le dispositif d'alerte. Le cahier REMI s'applique également aux études pour le classement des zones de production et de reparcage des coquillages, f [...]

Ifremer

Ce document précise les règles de traitement et d'interprétation des résultats du réseau de contrôle REMI, destinées à estimer la qualité bactériologique de chaque zone de production, à déterminer l'évolution de cette qualité et à définir les conditions de modification des fréquences de prélèvement.