{"id":209,"date":"2023-03-31T09:28:19","date_gmt":"2023-03-31T07:28:19","guid":{"rendered":"https:\/\/tara-gosee.fr\/publications\/"},"modified":"2023-05-10T15:05:53","modified_gmt":"2023-05-10T13:05:53","slug":"publications","status":"publish","type":"page","link":"https:\/\/tara-gosee.fr\/en\/publications\/","title":{"rendered":"Publications"},"content":{"rendered":"<div id=\"blocAffichPublis\">Number of results : 258<div class=\"blocFlexSDG\"><div class=\"blocPublication\"><h5>A holistic perspective on planktonic communities across the Northwestern Mediterranean Sea<\/h5><div class=\"displayPubli\"><p>Magali Lescot, Nolan Lezzoche, Louise Laux, Sarah Romac, Lo\u00efc Guilloux, Elisabeth Chevillon, Corentin Bodson, Corinne Desnos, Amanda Elineau, La\u00ebtitia Jalabert, Natalia Llopis Monferrer, Miguel Mendez Sandin, Thomas Vannier, Caroline Vernette, Emilie Villar, Fabien Lombard, Fran\u00e7ois Carlotti, Jean-Olivier Irisson, Lionel Guidi, Anthony Bosse, Pierre Testor, Laurent Coppola, Fabrice Not.<\/p><div class=\"txtPublis\"><div class=\"halDateformat\"><span>Frontiers in Marine Science, 2026<\/span><\/div><div id=\"typeHalIconsBloc\"><div class=\"typeHal\"><span>Journal articles<\/span><\/div><div class=\"iconsBlocPublis\"> <span class=\"doiIcon\"><a href=\"https:\/\/dx.doi.org\/10.3389\/fmars.2026.1755855\">doi<\/a><\/span><a target=\"_blank\" class=\"lienIconHal\" href=\"https:\/\/hal.science\/hal-05594720\/document\"><i class=\"fa-regular fa-file-pdf\"><\/i><\/a><\/div><\/div><\/div><\/div><\/div><div class=\"sdg-wheel\" data-wheel-height=\"200\" data-model=\"aurora-sdg-multi\" data-text=\"The Northwestern Mediterranean Sea is undergoing rapid environmental changes driven by climate variability and intense anthropogenic pressure. To monitor and understand the long-term impacts on marine ecosystems, the Mediterranean Ocean Observing System for the Environment (MOOSE) program combines multidisciplinary observations, including physical, chemical, and biological data across temporal and spatial scales. This study presents a holistic assessment of planktonic communities across the Northwestern Mediterranean using integrated approaches\u2014environmental genomics and high-resolution imaging\u2014spanning all plankton size fractions and depths. Data collected during three MOOSE-GE cruises in 2017, 2018, and 2019 were analyzed to explore plankton diversity patterns in relation to oceanographic features. Plankton assemblages were primarily shaped by organism size and water column depth, with fractions of 0.2\u20133 and 3\u2013180 \u00b5m in the surface and deep chlorophyll maximum layers showing the highest alpha diversity. Fractions &gt; 64 \u00b5m were dominated by metazoans, particularly Arthropoda, whereas size classes collected by Niskin bottles were dominated by protists such as Syndiniales and Rhizaria. Differences among cruises and sampling periods were detected in Niskin bottle samples, especially for diatoms and dinoflagellates, while plankton tow samples exhibited less pronounced temporal variability. Physical clustering of stations revealed clear cross-shelf and basin-scale gradients, which aligned more closely with community structure at fine taxonomic resolution (OTU level) for small plankton. Integrating imaging with environmental genomic data enhanced the characterization of key taxa like Copepoda and Rhizaria, demonstrating the complementary strengths of each method. While imaging provided quantitative data, environmental genomics captured cryptic and morphologically indistinct taxa, emphasizing the value of molecular approaches for microbial plankton. This study highlights the critical importance of combining high-resolution molecular and imaging tools with detailed environmental context to unravel plankton biodiversity patterns. It demonstrates that depth, size, and taxonomic resolution are key dimensions for understanding community structure over time. The MOOSE program proves effective for ecosystem-scale monitoring, providing an essential foundation for future assessments of biogeochemical processes and ecosystem responses to climate change and human-induced alterations in the Mediterranean Sea.\"><\/div><\/div><div class=\"blocFlexSDG\"><div class=\"blocPublication\"><h5>Co-occurrence is associated with horizontal gene transfer across marine bacteria independent of phylogeny<\/h5><div class=\"displayPubli\"><p>Gavin M Douglas, Nicolas Tromas, Marinna Gaudin, Patrick Lypaczewski, Louis-Marie Bobay, B Jesse Shapiro, Samuel Chaffron.<\/p><div class=\"txtPublis\"><div class=\"halDateformat\"><span>The International Society of Microbiologial Ecology Journal, 2026<\/span><\/div><div id=\"typeHalIconsBloc\"><div class=\"typeHal\"><span>Journal articles<\/span><\/div><div class=\"iconsBlocPublis\"> <span class=\"doiIcon\"><a href=\"https:\/\/dx.doi.org\/10.1093\/ismejo\/wraf275\">doi<\/a><\/span><a target=\"_blank\" class=\"lienIconHal\" href=\"https:\/\/hal.inrae.fr\/hal-05563160\/document\"><i class=\"fa-regular fa-file-pdf\"><\/i><\/a><a target=\"_blank\" class=\"lienIconHal\" href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC12815264\"><i class=\"fa-solid fa-unlock-keyhole\"><\/i><\/a><\/div><\/div><\/div><\/div><\/div><div class=\"sdg-wheel\" data-wheel-height=\"200\" data-model=\"aurora-sdg-multi\" data-text=\"Understanding the drivers and consequences of horizontal gene transfer (HGT) is a key goal of microbial evolution research. Although co-occurring taxa have long been appreciated to undergo HGT more often, this association is confounded with other factors, most notably their phylogenetic relatedness. To disentangle these factors, we analyzed 15\u2009339 marine prokaryotic genomes (mainly bacteria) and their distribution in the global ocean. We identified HGT events across these genomes and enrichments for functions previously shown to be prone to HGT. By mapping metagenomic reads from 1862 ocean samples to these genomes, we also identified co-occurrence patterns and environmental associations. Although we observed an expected negative association between HGT rates and phylogenetic distance, we only detected an association between co-occurrence and phylogenetic distance for closely related taxa. This observation refines the previously reported trend to closely related taxa, rather than a consistent pattern across all taxonomic levels, at least here within marine environments. In addition, we identified a significant association between co-occurrence and HGT, which remains even after controlling for phylogenetic distance and measured environmental variables. In a subset of samples with extended environmental data, we identified higher HGT levels associated with particle-attached prokaryotes and associations of varying directions with specific environmental variables, such as chlorophyll a and photosynthetically available radiation. Overall, our findings demonstrate the significant influence of ecological associations in shaping marine prokaryotic evolution through HGT.\"><\/div><\/div><div class=\"blocFlexSDG\"><div class=\"blocPublication\"><h5>Coral microbiomes as reservoirs of unknown genomic and biosynthetic diversity<\/h5><div class=\"displayPubli\"><p>Fabienne Wiederkehr, Lucas Paoli, Daniel Richter, Dora Racunica, Hans-Joachim Ruscheweyh, Martin Sperfeld, James O\u2019brien, Samuel Miravet-Verde, Alena Streiff, Jessica Ransome, Clara Chepkirui, Taylor Priest, Anna Sintsova, Guillem Salazar, Kalia Bistolas, Teresa Sawyer, Karine Labadie, Kim-Isabelle Mayer, Aude Perdereau, Maggie Reddy, Cl\u00e9mentine Moulin, Emilie Boissin, Guillaume Bourdin, Juliette Cailliau, Guillaume Iwankow, Julie Poulain, Sarah Romac, Colomban de Vargas, J. Michel Flores, Paola Furla, Eric Gilson, St\u00e9phane Pesant, Stephanie Reynaud, Didier Zoccola, Serge Planes, Denis Allemand, Sylvain Agostini, Chris Bowler, Eric Douville, Didier Forcioli, Pierre Galand, Fabien Lombard, Pedro Oliveira, Olivier Thomas, Rebecca Vega Thurber, Romain Troubl\u00e9, Christian Voolstra, Patrick Wincker, Maren Ziegler, J\u00f6rn Piel, Shinichi Sunagawa.<\/p><div class=\"txtPublis\"><div class=\"halDateformat\"><span>Nature, 2026<\/span><\/div><div id=\"typeHalIconsBloc\"><div class=\"typeHal\"><span>Journal articles<\/span><\/div><div class=\"iconsBlocPublis\"> <span class=\"doiIcon\"><a href=\"https:\/\/dx.doi.org\/10.1038\/s41586-026-10159-6\">doi<\/a><\/span><a target=\"_blank\" class=\"lienIconHal\" href=\"https:\/\/hal.science\/hal-05607741\/document\"><i class=\"fa-regular fa-file-pdf\"><\/i><\/a><a target=\"_blank\" class=\"lienIconHal\" href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC13083261\"><i class=\"fa-solid fa-unlock-keyhole\"><\/i><\/a><\/div><\/div><\/div><\/div><\/div><div class=\"sdg-wheel\" data-wheel-height=\"200\" data-model=\"aurora-sdg-multi\" data-text=\"Abstract Coral reefs are marine biodiversity hotspots that provide a wide range of ecosystem services 1 . They are reservoirs of bioactive metabolites, many produced by microorganisms associated with reef invertebrate hosts 2 . However, for the keystone species of coral reefs\u2014the reef-building corals\u2014we still lack a systematic assessment of their microbially encoded biosynthetic potential and the molecular resources at stake due to the alarming decline in reef biodiversity. Here we analysed microbial genomes reconstructed from 820 reef-building coral samples of three representative coral genera collected at 99 reefs across 32 islands throughout the Pacific Ocean ( Tara Pacific expedition) 3 . By contextualizing our analyses with the microbiomes of other reef species, we found that only 10% of the 4,224 microbial species and less than 1% of the 645 species exclusively identified in Tara Pacific samples had genomic information available. Furthermore, the biosynthetic potential of reef-building coral microbiomes rivalled or surpassed that of traditional natural product sources such as sponges. Among the biosynthetically rich bacteria in the reef microbiome, we identified new groups of Acidobacteriota that encode previously unknown enzymology, in turn opening promising avenues for functional protein engineering. Together, this study underscores the importance of conserving coral reefs as vital reservoirs of molecular diversity.\"><\/div><\/div><div class=\"blocFlexSDG\"><div class=\"blocPublication\"><h5>Ecological Processes Shaping Marine Microbial Assemblages Diverge Between Equatorial and Temperate Time\u2010Series<\/h5><div class=\"displayPubli\"><p>Pedro C Junger, Vinicius S Kavagutti, Ina M Deutschmann, Carlota R Gazulla, Paula Huber, Maiara Menezes, Rodolfo Paranhos, Andr\u00e9 M Amado, Isabel Ferrera, Janaina Rigonato, Samuel Chaffron, Josep M Gasol, Ramiro Logares, Hugo Sarmento.<\/p><div class=\"txtPublis\"><div class=\"halDateformat\"><span>Molecular Ecology, 2026<\/span><\/div><div id=\"typeHalIconsBloc\"><div class=\"typeHal\"><span>Journal articles<\/span><\/div><div class=\"iconsBlocPublis\"> <span class=\"doiIcon\"><a href=\"https:\/\/dx.doi.org\/10.1111\/mec.70241\">doi<\/a><\/span><a target=\"_blank\" class=\"lienIconHal\" href=\"https:\/\/hal.science\/hal-05594363\/document\"><i class=\"fa-regular fa-file-pdf\"><\/i><\/a><a target=\"_blank\" class=\"lienIconHal\" href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC12809624\"><i class=\"fa-solid fa-unlock-keyhole\"><\/i><\/a><\/div><\/div><\/div><\/div><\/div><div class=\"sdg-wheel\" data-wheel-height=\"200\" data-model=\"aurora-sdg-multi\" data-text=\"Marine microbial communities are structured by a complex interplay of deterministic and stochastic processes, yet how these vary across latitudes remains poorly understood. Most long-term microbial observatories are restricted to temperate regions, limiting our ability to assess latitudinal contrasts in microbial dynamics. Here, we compare coastal microbial communities from two contrasting marine time-series stations using standardised molecular protocols: a new tropical site in the Equatorial Atlantic (EAMO, 6\u00b0 S) and a well-studied temperate site in the Mediterranean Sea (BBMO, 41\u00b0 N). Monthly 16S and 18S rRNA gene sequencing of two size-fractions (0.22-3 \u03bcm and &gt; 3 \u03bcm) over 41 months (from April 2013 to August 2016) revealed marked differences in taxonomic composition, temporal variability and ecological assembly processes. Temperate communities exhibited strong seasonal turnover, higher beta-diversity and tighter coupling with environmental variables such as temperature and daylength. In contrast, tropical communities were compositionally more stable and more governed by biotic factors and stochastic processes such as historical contingency and ecological drift. These patterns were consistent across taxonomic domains and sizefractions, though selection was generally stronger in prokaryotes and the smallest size-fraction. Co-occurrence networks at the temperate site were more densely connected and environmentally responsive compared to tropical networks, where stochastic processes and putative biological interactions gain prominence. This study highlights the importance of integrating observatories from underrepresented latitudes into global microbial monitoring efforts, particularly as climate change alters the amplitude and frequency of environmental drivers across the ocean.\"><\/div><\/div><div class=\"blocFlexSDG\"><div class=\"blocPublication\"><h5>Functional complementarity between vitamin B1 and B12 metabolisms shapes seasonal marine microbial communities<\/h5><div class=\"displayPubli\"><p>Maxime Beauvais, Philippe Schatt, Tanguy Souli\u00e9, Stefan Lambert, Lidia Montiel, Marinna Gaudin, Samuel Chaffron, Ramiro Logares, Fran\u00e7ois-Yves Bouget, Pierre E Galand.<\/p><div class=\"txtPublis\"><div class=\"halDateformat\"><span>The International Society of Microbiologial Ecology Journal, 2026<\/span><\/div><div id=\"typeHalIconsBloc\"><div class=\"typeHal\"><span>Journal articles<\/span><\/div><div class=\"iconsBlocPublis\"> <span class=\"doiIcon\"><a href=\"https:\/\/dx.doi.org\/10.1093\/ismejo\/wrag029\">doi<\/a><\/span><a target=\"_blank\" class=\"lienIconHal\" href=\"https:\/\/hal.science\/hal-05594376\/document\"><i class=\"fa-regular fa-file-pdf\"><\/i><\/a><a target=\"_blank\" class=\"lienIconHal\" href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC12998435\"><i class=\"fa-solid fa-unlock-keyhole\"><\/i><\/a><\/div><\/div><\/div><\/div><\/div><div class=\"sdg-wheel\" data-wheel-height=\"200\" data-model=\"aurora-sdg-multi\" data-text=\"Marine microbial communities are fundamental to nutrient and biogeochemical cycling, with intricate networks of metabolic interdependencies influencing their structure and dynamics. Among these, vitamins B 1 (thiamin) and B 12 (cobalamin) play crucial roles as enzymatic cofactors in central metabolic pathways. Despite their importance, the temporal dynamics of vitamin production, bioavailability, and associated microbial interactions remain poorly understood. Using a 7-year monthly metagenomic time series from the NW Mediterranean Sea (SOLA station), we found that vitamin B 1 \/B 12 auxotrophs (need for an exogenous vitamin source) were present throughout the year. Among B 1 auxotrophs, those requiring the thiamin precursor pyrimidine were the most prevalent, with peak abundances in summer. Distinct metagenome-assembled genome co-abundance patterns between B 1 and B 12 producers\/auxotrophs across seasons suggested mutualistic relationships. Double B 1 \/B 12 vitamin complementarities were more common in summer, and single vitamin complementarity was dominant in winter. As previously shown for vitamin B 12 , which is limiting during winter, bioassays revealed variable availability of vitamin B 1 in winter seawater despite the abundance of its producers, suggesting potential transfer of vitamin B 1 among microorganisms. Finally, microcosm experiments showed that B 1 and B 12 amendments significantly influenced the composition of microbial communities, with temporal variations in their impact. In some cases, B 12 and B 1 amendments favored both vitamin auxotrophs and producers, highlighting complex interdependencies between B 1 and B 12 producers and consumers. Our findings highlight the complexity of B vitaminmediated metabolic interactions that shape microbial community dynamics and underscore the need for long-term, high-resolution studies to better understand vitamin-driven ecological processes in marine systems.\"><\/div><\/div><div class=\"blocFlexSDG\"><div class=\"blocPublication\"><h5>Genomic analysis of <i>Ostreococcus tauri<\/i>-infecting viruses reveals a hypervariable region associated with host\u2013virus interactions<\/h5><div class=\"displayPubli\"><p>Julie Thomy, Julien Henri, David Demory, Frederic Sanchez, Marie-Line Escande, Gilles Mirambeau, Nigel Grimsley, Sheree Yau.<\/p><div class=\"txtPublis\"><div class=\"halDateformat\"><span>Virus Evolution, 2026<\/span><\/div><div id=\"typeHalIconsBloc\"><div class=\"typeHal\"><span>Journal articles<\/span><\/div><div class=\"iconsBlocPublis\"> <span class=\"doiIcon\"><a href=\"https:\/\/dx.doi.org\/10.1093\/ve\/veaf096\">doi<\/a><\/span><a target=\"_blank\" class=\"lienIconHal\" href=\"https:\/\/hal.sorbonne-universite.fr\/hal-05370419\/document\"><i class=\"fa-regular fa-file-pdf\"><\/i><\/a><\/div><\/div><\/div><\/div><\/div><div class=\"sdg-wheel\" data-wheel-height=\"200\" data-model=\"aurora-sdg-multi\" data-text=\"\"><\/div><\/div><div class=\"blocFlexSDG\"><div class=\"blocPublication\"><h5>Oceanography, biogeochemical cycles, and biodiversity in the Central Arctic Ocean: current state of knowledge and directions for future<\/h5><div class=\"displayPubli\"><p>Maxime Geoffroy, Igor Polyakov, Marit Reigstad, Silvia G Acinas, R\u00e9mi Amiraux, H\u00e9l\u00e8ne Angot, Mathieu Ardyna, Marcel Babin, Chris Bowler, Douglas Couet, Tyler D Eddy, Angela Falciatore, Lionel Guidi, Mario Hoppmann, Marie-No\u00eblle Houssais, Lee Karp, Connie Lovejoy, Eric Marechal, Eric Pelletier, Eva Ortega, Jean-Fran\u00e7ois Ghiglione, Georg Pohnert, Benjamin Rabe, Guillem Salazar, Julia Schmale, Nina Schuback, Matt Sullivan, Sandra Tippenhauer, Romain Troubl\u00e9, Emilia Trudnowska, Assaf Vardi, Flora Vincent.<\/p><div class=\"txtPublis\"><div class=\"halDateformat\"><span>Elementa: Science of the Anthropocene, 2026<\/span><\/div><div id=\"typeHalIconsBloc\"><div class=\"typeHal\"><span>Journal articles<\/span><\/div><div class=\"iconsBlocPublis\"><a target=\"_blank\" class=\"lienIconHal\" href=\"https:\/\/hal.science\/hal-05480562\/document\"><i class=\"fa-regular fa-file-pdf\"><\/i><\/a><\/div><\/div><\/div><\/div><\/div><div class=\"sdg-wheel\" data-wheel-height=\"200\" data-model=\"aurora-sdg-multi\" data-text=\"<div><p>Climatic changes in the physical environment modulate biogeochemical cycles, biodiversity, and trophic interactions in the Central Arctic Ocean (CAO). Physical processes and sea-ice conditions are highly seasonal in the CAO and dependent on interactions that occur throughout the evolution of the upper ocean-sea ice-lower atmosphere system. Understanding these seasonal interactions is critical to comprehending and predicting the long-term trends as the CAO moves towards ice-free summers and to informing future policy decisions at the core of ongoing discussions concerning the CAO Fisheries agreement, e.g., at the Arctic Council and International Council for Exploration of the Sea working group on the CAO. Here, we review current knowledge of the physical environment, biogeochemical cycles, and biodiversity in the waters of the CAO, identify emerging research questions, and introduce the science plan for the first Tara Polaris drift onboard the Tara Polar Station to advance knowledge and address these questions. Despite increased observational programs in the CAO over the past years, e.g., the Nansen and Amundsen Basin Observational System (NABOS) and Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC), extensive knowledge gaps remain in relation to ocean stratification, sea ice and lightscape, nitrogen fixation and nutrient fluxes, carbon export and transfer, sympagic-pelagic coupling, aerosol production, contaminant transport and transformation, chronobiology, and fish distribution. Further knowledge on overall CAO biodiversity, ecosystem functionality and interannual variability is also critically needed.<\/p><p>We describe a way forward to address these knowledge gaps using ice-tethered and profiling instruments coupled with multi-omics, culturing, and imagery approaches deployed from Tara Polar Station during the first of ten Tara Polaris drifts designed to facilitate detection of interannual variability and change over time.<\/p><\/div>\"><\/div><\/div><div class=\"blocFlexSDG\"><div class=\"blocPublication\"><h5>OligoN\u2010Design: A Simple and Versatile Tool to Design Specific Probes and Primers From Large Heterogeneous Datasets<\/h5><div class=\"displayPubli\"><p>Miguel Sandin, Marie Walde, Nicolas Henry, Irene Forn, Nathalie Simon, C\u00e9dric Berney, Ramon Massana, Daniel Richter.<\/p><div class=\"txtPublis\"><div class=\"halDateformat\"><span>Molecular Ecology Resources, 2026<\/span><\/div><div id=\"typeHalIconsBloc\"><div class=\"typeHal\"><span>Journal articles<\/span><\/div><div class=\"iconsBlocPublis\"> <span class=\"doiIcon\"><a href=\"https:\/\/dx.doi.org\/10.1111\/1755-0998.70140\">doi<\/a><\/span><\/div><\/div><\/div><\/div><\/div><div class=\"sdg-wheel\" data-wheel-height=\"200\" data-model=\"aurora-sdg-multi\" data-text=\"ABSTRACT High\u2010throughput environmental DNA sequencing has ushered ecological and evolutionary studies into the big data era. With thousands to millions of DNA sequences, designing taxon\u2010specific oligonucleotides is a current bottleneck of molecular studies that rely on primers for Polymerase Chain Reactions (PCRs) or probes for Fluorescence in\u00a0situ Hybridization (FISH). No software currently exists to design specific oligonucleotides starting from a custom set of sequences. Existing tools rely on specific databases, alignments or phylogenetic trees, or cannot accommodate increasingly large molecular environmental datasets. Here we present oligoN\u2010design, a versatile tool to design oligonucleotides specific to a set of target sequences while minimizing predicted binding to non\u2010target sequences. OligoN\u2010design is simple, reproducible and adaptable to high\u2010throughput sequencing data analyses. It requires only two fasta files as input, one containing target taxa and the other containing non\u2010target taxa. Using standard bioinformatic formats, it integrates easily with other tools such as BLAST, VSEARCH or MAFFT. OligoN\u2010design allows a range of strategies that we present in detail, from an unsupervised end\u2010to\u2010end usage all the way to a detailed and thorough expert usage. Starting with large, comprehensive ribosomal databases that are widely used by the community (i.e., PR2, SILVA) and the unsupervised function, we were able to replicate known taxa\u2010specific oligonucleotides in under 30\u2009min and up to 6\u2009GB of RAM on a personal laptop. OligoN\u2010design, available at github.com\/MiguelMSandin\/oligoN\u2010design under GNU General Public Licence version 3.0, is easily installed via bioconda bioconda.github.io\/recipes\/oligon\u2010design\/README.html .\"><\/div><\/div><div class=\"blocFlexSDG\"><div class=\"blocPublication\"><h5>Tara Polaris expeditions: seasonal and long-term contaminant monitoring in the changing central Arctic<\/h5><div class=\"displayPubli\"><p>Jean-Fran\u00e7ois Ghiglione, Lars-Eric Heimb\u00fcrger-Boavida, Marion Fourquez, Ian Hough, Jeroen E. Sonke, Alexandra ter Halle, Kathy S. Law, Julia Schmale, J. Michel Flores, Julien Gigault, Mathieu Ardyna, Stephen Kohler, Zhiyong Xie, Jay Cullen, Maxime Geoffroy, Cl\u00e9mentine Moulin, Romain Troubl\u00e9, Lee Karp-Boss, Chris Bowler, Marcel Babin, H\u00e9l\u00e8ne Angot.<\/p><div class=\"txtPublis\"><div class=\"halDateformat\"><span>2026<\/span><\/div><div id=\"typeHalIconsBloc\"><div class=\"typeHal\"><span>Preprints, Working Papers...<\/span><\/div><div class=\"iconsBlocPublis\"><a target=\"_blank\" class=\"lienIconHal\" href=\"https:\/\/hal.science\/hal-05466231\/document\"><i class=\"fa-regular fa-file-pdf\"><\/i><\/a><\/div><\/div><\/div><\/div><\/div><div class=\"sdg-wheel\" data-wheel-height=\"200\" data-model=\"aurora-sdg-multi\" data-text=\"The central Arctic atmosphere, cryosphere, hydrosphere and biosphere, is heavily impacted by anthropogenic activities. While some contaminants originate from local activities, the majority are transported over long distances via rivers, ocean currents, and atmospheric pathways. Contaminants can have adverse effects on the environment, ecosystems, and human health, which are expected to intensify with continued emissions and warming climate. This article outlines the objectives for new studies on contaminants in the Arctic Ocean, in particular during the Tara Polaris expedition, with an emphasis on year-round long-term contaminant dynamics and associated ecotoxicological risks. Mercury contamination remains a major concern in the Arctic, especially in the form of methylmercury, which is primarily produced by marine microbes. Methylmercury bioconcentrates, bioaccumulates and biomagnifies to harmful levels in Arctic wildlife and threatens indigenous communities. Anthropogenic lead (Pb), though low in Arctic waters, remains toxic and may be remobilized by climate change. Plastic pollution, from nano-to macro-scales, is widespread across all Arctic compartments, closely interacting with planktonic communities and posing ingestion risks to invertebrates, fish, seabirds and mammals (including humans). Chemicals of Emerging Arctic Concern (CEAC), including newly recognized persistent organic pollutants inherited from past industrial activities (e.g., per-and polyfluoroalkyl substances (PFAS)), are more recalcitrant in the environment than many other synthetic compounds, raising serious questions about their long-term ecological and health effects. In this context, the Tara Polaris expeditions aim to produce high-resolution, year-round observational data in the central Arctic to deepen our understanding of contaminant sources, transport, internal cycling and environmental fate. These data will also support the development and refinement of numerical models for contaminant dynamics in the context of both Arctic and global environmental change.\"><\/div><\/div><div class=\"blocFlexSDG\"><div class=\"blocPublication\"><h5>Tara Polaris expeditions: Sustained decadal observations of the coupled Arctic system in rapid transition<\/h5><div class=\"displayPubli\"><p>Mathieu Ardyna, Marcel Nicolaus, Marie-No\u00eblle Houssais, Jean-Christophe Raut, H\u00e9l\u00e8ne Angot, Kelsey Bisson, Kristina A Brown, J Michel Flores, Jean-Fran\u00e7ois Ghiglione, Maxime Geoffroy, Lars-Eric Heimb\u00fcrger-Boavida, Kathy S. Law, Fran\u00e7ois Ravetta, Julia Schmale, Nina Schuback, Jeroen E Sonke, Martin Vancoppenolle, Jean\u2010\u00e9ric Tremblay, Marcel Babin, Chris Bowler, Lee Karp-Boss, Lovejoy Connie, Rysgaard S\u00f8ren, Romain Troubl\u00e9.<\/p><div class=\"txtPublis\"><div class=\"halDateformat\"><span>2026<\/span><\/div><div id=\"typeHalIconsBloc\"><div class=\"typeHal\"><span>Preprints, Working Papers...<\/span><\/div><div class=\"iconsBlocPublis\"><a target=\"_blank\" class=\"lienIconHal\" href=\"https:\/\/hal.science\/hal-05453026\/document\"><i class=\"fa-regular fa-file-pdf\"><\/i><\/a><a target=\"_blank\" class=\"lienIconHal\" href=\"http:\/\/arxiv.org\/pdf\/2601.08370\"><i class=\"fa-solid fa-unlock-keyhole\"><\/i><\/a><\/div><\/div><\/div><\/div><\/div><div class=\"sdg-wheel\" data-wheel-height=\"200\" data-model=\"aurora-sdg-multi\" data-text=\"<div><p>The coupled Arctic system is in rapid transition and is set to undergo further dramatic changes over the coming decades. These changes will lead most likely to an ice-free ocean in summer, expected before mid-century. The Arctic will become more strongly influenced by atmospheric and oceanographic processes characteristic of mid-latitudes, increasing the prevalence of contaminants and new biological species. This ongoing transition of the Arctic to a new state necessitates systematic monitoring of all sentinels (variables that make an essential contribution to characterizing the Earth's state) to improve our understanding of the system, enhance forecasting and support knowledge-based decisions. Here, we describe a sustained multi-decadal observation program to be implemented on the Tara Polar Station between 2026 and 2046. The monitoring program is designed as a series of year-long drift expeditions, called Tara Polaris, in the central Arctic Ocean, covering all seasons. The multidisciplinary data will bridge ecological, geochemical, biological, and physical parameters and processes in the atmosphere, sea ice and ocean. In addition, data collected with consistent methodologies over a 20-year period will make it possible to distinguish long-term trends from seasonal and interannual variability. In this paper, we discuss specific measurement challenges in each compartment (i.e., atmosphere, sea ice and ocean) along key sentinels and the most pressing scientific questions to be addressed. The expected outcomes of the Tara Polaris program will enable us to understand and quantify the main feedbacks of the coupled Arctic system, with their seasonal and interannual trends and spatial variability.<\/p><\/div>\"><\/div><\/div><div id='paginationPubs' class='page-nav-container'>Pages - <span class=\"page-numbers current\">1 - <\/span><span class=\"page-numbers\">2 - <\/span><span class=\"page-numbers\">3 - <\/span><span class=\"page-numbers\">4 - <\/span><span class=\"page-numbers\">5 - <\/span><span class=\"page-numbers\">6 - <\/span><span class=\"page-numbers\">7 - <\/span><span class=\"page-numbers\">8 - <\/span><span class=\"page-numbers\">9 - <\/span><span class=\"page-numbers\">10 - <\/span><span class=\"page-numbers\">11 - <\/span><span class=\"page-numbers\">12 - <\/span><span class=\"page-numbers\">13 - <\/span><span class=\"page-numbers\">14 - <\/span><span class=\"page-numbers\">15 - <\/span><span class=\"page-numbers\">16 - <\/span><span class=\"page-numbers\">17 - <\/span><span class=\"page-numbers\">18 - <\/span><span class=\"page-numbers\">19 - <\/span><span class=\"page-numbers\">20 - <\/span><span class=\"page-numbers\">21 - <\/span><span class=\"page-numbers\">22 - <\/span><span class=\"page-numbers\">23 - <\/span><span class=\"page-numbers\">24 - <\/span><span class=\"page-numbers\">25 - <\/span><span class=\"page-numbers\">26<\/span><\/div><\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:var(--wp--preset--spacing--40);margin-bottom:var(--wp--preset--spacing--40);padding-bottom:var(--wp--preset--spacing--50)\">\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"735\" height=\"694\" src=\"https:\/\/tara-gosee.fr\/wp-content\/uploads\/sites\/3\/2023\/05\/fin_publication.png\" alt=\"\" class=\"wp-image-442\" srcset=\"https:\/\/tara-gosee.fr\/wp-content\/uploads\/sites\/3\/2023\/05\/fin_publication.png 735w, https:\/\/tara-gosee.fr\/wp-content\/uploads\/sites\/3\/2023\/05\/fin_publication-300x283.png 300w\" sizes=\"auto, (max-width: 735px) 100vw, 735px\" \/><\/figure>\n<\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"wp-custom-template-publications-2","meta":{"footnotes":""},"class_list":["post-209","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/tara-gosee.fr\/en\/wp-json\/wp\/v2\/pages\/209","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tara-gosee.fr\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/tara-gosee.fr\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/tara-gosee.fr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tara-gosee.fr\/en\/wp-json\/wp\/v2\/comments?post=209"}],"version-history":[{"count":3,"href":"https:\/\/tara-gosee.fr\/en\/wp-json\/wp\/v2\/pages\/209\/revisions"}],"predecessor-version":[{"id":584,"href":"https:\/\/tara-gosee.fr\/en\/wp-json\/wp\/v2\/pages\/209\/revisions\/584"}],"wp:attachment":[{"href":"https:\/\/tara-gosee.fr\/en\/wp-json\/wp\/v2\/media?parent=209"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}