French Research Institute for Exploitation of the Sea
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Toward Improving Representation of the Atlantic Meridional Overturning Circulation in Climate Models
No full textEMSO ERIC a pan European Marine Research Infrastructure to take the pulse of the Deep Ocean
No full textIJL TAPIOCA: A collaborative French-Brazilian initiative to advance biodiversity and taxonomic knowledge of deep-pelagic fishes
No full textKeeping tabs on ocean alkalinity enhancement: effects of olivine dissolution on the embryonic and larval development of the Pacific oyster Magallana gigas
No full textDissolved Organic Carbon in Coastal Waters: Global Patterns, Stocks and Environmental Physical Controls
No full textDissolved organic carbon (DOC) in coastal waters is integral to biogeochemical cycling, but global and regional drivers of DOC are still uncertain. In this study we explored spatial and temporal differences in DOC concentrations and stocks across the global coastal ocean, and how these relate to temperature and salinity. We estimated a global median coastal DOC stock of 3.15 Pg C (interquartile range (IQR) = 0.85 Pg C), with median DOC concentrations being 2.2 times higher than in open ocean surface waters. Globally and seasonally, salinity was the main driver of DOC with concentrations correlated negatively with salinity, without a clear relationship to temperature. DOC concentrations and stocks varied with region and season and this pattern is likely driven by riverine inputs of DOC and nutrients that stimulate coastal phytoplankton production. Temporally, high DOC concentrations occurred mainly in months with high freshwater input, with some exceptions such as in Eastern Boundary Current margins where peaks are related to primary production stimulated by nutrients upwelled from the adjacent ocean. No spatial trend between DOC and temperature was apparent, but many regions (19 out of 25) had aligned peaks of seasonal temperature and DOC, related to increased phytoplankton production and vertical stratification at high temperatures. Links of coastal DOC with salinity and temperature highlight the potential for anthropogenic impacts to alter coastal DOC concentration and composition, and thereby ecosystem status
Assessing Geological and Seismic Hazards of Malili-Matano Region, East Luwu Regency, Sulawesi: A Preliminary Study for CCS and Strategic Infrastructure Planning
No full textUnderstanding the seismotectonic characteristics and seismic hazards of the Malili-Matano Region (MMR) in Sulawesi is crucial due to its proximity to active faults, including the Matano Fault Zone (MFZ) and surrounding fault systems. These geological conditions pose significant risks to infrastructure development, particularly Carbon Capture and Storage (CCS) facilities, which require a thorough assessment of seismic hazards. This study integrates seismotectonic mapping and Probabilistic Seismic Hazard Analysis (PSHA) to evaluate earthquake risks, with a particular focus on spectral acceleration (PSA) values that influence structural resilience.
The results indicate that MMR exhibits complex fault interactions, leading to elevated Peak Ground Acceleration (PGA) and Spectral Acceleration (PSA) values, with PSA Ss = 1.10 g at 0.2 seconds and S1 = 0.55 g at 1 second for Site Class SB under a 2% probability of exceedance in 50 years (2500-year return period). These seismic hazard estimates suggest that structural design in the region must adhere to Seismic Design Category D standards, including reinforced foundations and real-time ground motion monitoring to enhance CCS infrastructure safety. The study underscores the importance of continuous seismic monitoring, hazard mitigation strategies, and risk communication for infrastructure resilience in seismically active environments. The findings contribute to a refined understanding of seismotectonic behavior in MMR and its implications for CCS site selection and long-term sustainability
Characterizing environmental contamination by plant protection products along the land-to-sea continuum:a focus on France and French overseas territories
No full textEnvironmental compartments are contaminated by a broad spectrum of plant protection products (PPPs) that are currently widely used in agriculture or, for some of them, whose use was banned many years ago. The aim of this study is to draw up an overview of the levels of contamination of soils, continental aquatic environments, seawaters and atmosphere by organic PPPs in France and the French overseas territories, based on data from the scientific publications and the grey literature. It is difficult to establish an exhaustive picture of the overall contamination of the environment because the various compartments monitored, the monitoring frequencies, the duration of the studies and the lists of substances are not the same. Of the 33 PPPs most often recorded at high concentration levels in at least one compartment, 5 are insecticides, 9 are fungicides, 15 are herbicides and 4 are transformation products. The PPP contamination of the environment shows generally a seasonal variation according to crop cycles. On a pluriannual scale, the contamination trends are linked to the level of use driven by the pest pressure, and especially to the ban of PPP. Overall, the quality of the data acquired has been improved thanks to new, more integrative sampling strategies and broad-spectrum analysis methods that make it possible to incorporate the search for emerging contaminants such as PPP transformation products. Taking into account additional information (such as the quantities applied, agricultural practices, meteorological conditions, the properties of PPPs and environmental conditions) combined with modelling tools will make it possible to better assess and understand the fate and transport of PPPs in the environment, inter-compartment transfers and to identify their potential impacts. Simultaneous monitoring of all environmental compartments as well as biota in selected and limited relevant areas would also help in this assessment
Directive cadre sur l'eau Bassin Loire-Bretagne. Contrôle de surveillance dans les masses d'eau côtière et de transition. Actions menées par Ifremer en 2022
No full textLe contrôle de surveillance 2022 pour la DCE, appliqué dans les eaux littorales de Loire-Bretagne, a porté sur 25 masses d’eau côtière (sur 39 au total) et 16 masses d’eau de transition (sur 30 au total) retenues au titre du contrôle de surveillance. Ce document fait le bilan de la surveillance DCE mise en oeuvre en 2022 sur le bassin Loire-Bretagne dans le cadre de la convention de coopération Ifremer/AELB relative à la mise en oeuvre de la surveillance RCS (Réseau de contrôle de surveillance). Les éléments de qualité concernés par cette convention sont : la physico-chimie en soutien à la biologie, le phytoplancton, les angiospermes, la macrofaune benthique et les contaminants chimiques. Pour chaque élément de qualité concerné par cette convention, ce rapport présente la stratégie d’échantillonnage, la surveillance réalisée ainsi que les résultats de calcul des différentes métriques et indicateurs, lorsque cela est possible. Le calcul des indicateurs s’appuie sur le jeu de données 2017-2022. Les résultats présentés sont des résultats intermédiaires qui ne se substituent pas à l'état des lieux officiel des masses d'eau, réalisé en 2019, qui est présenté dans le programme de mesures en ligne sur le site de l'Agence de l'eau Loire-Bretagne (jeu de données 2012-2017)
Charting a science course for the sustainable transformation of aquatic food systems
No full textAquatic foods hold a unique potential to contribute to a much-needed transformation of food systems thanks to their high nutritional value, cultural significance, and relatively low environmental impact. However, realizing this potential requires a transformative approach to help overcome two grand challenges: sustainably increasing the production of nutritious aquatic foods and ensuring equitable access to these resources. This paper highlights the key recommendations from the White Paper on Challenge 3 (‘Sustainably nourish the global population’) of the United Nations Decade of Ocean Science for Sustainable Development (hereafter, the Ocean Decade), developed by a group of experts under the Vision 2030 process, on the science needed to support a ‘Blue Transformation’. A holistic, interdisciplinary science agenda is proposed, emphasizing strengthened institutional and public–private partnerships, prioritizing the inclusion of small-scale actors, women, and youth, and focusing on delivering science targeted to solve specific challenges. The Ocean Decade provides a platform to catalyse these efforts, fostering a paradigm shift towards inclusive, co-created science. Achieving these goals will enable aquatic food systems to contribute significantly to global food security and the Sustainable Development Goals by 2030
Tenacibaculum platacis sp. nov., Tenacibaculum vairaonense sp. nov. and Tenacibaculum polynesiense sp. nov. isolated from batfish (Platax orbicularis) in Tahiti Island, French Polynesia
No full textTen novel Gram-negative, aerobic, non-sporulating, yellow-pigmented rod-shaped bacterial strains motile by gliding were isolated from marine organisms/environments in French Polynesia. Three of them designated as 190524A05cT, 190524A02bT and 190130A14aT were retrieved from orbicular batfish (Platax orbicularis) mucus. Online database comparisons using 16S rRNA amplicons resulted in over 95% similarity to the genus Tenacibaculum. Phylogenetic analyses based on 679 concatenated core protein sequences revealed that strains 190524A05cT, 190524A02bT and 190130A14aT showed the highest similarity to Tenacibaculum skagerrakense DSM 14836T, Tenacibaculum xiamenense LMG 27422T and Tenacibaculum holothuriorum S2-2T, respectively. Digital DNA–DNA hybridization and average nt identity values between strains 190524A05cT, 190524A02bT and 190130A14aT and other type strains were less than 76.25 and 24.1%, respectively. The DNA G+C content was 31.48, 30.66 and 31.98 mol% for strains 190524A05cT, 190524A02bT and 190130A14aT, respectively. Menaquinone-6 was detected as the major isoprenoid quinone in these three strains. The major polar lipids (phosphatidylethanolamine and aminophospholipid) were similar to the chemotaxonomic profile of other species of the genus Tenacibaculum. Strain 190524A05cT contained summed feature 3 (comprising C16:1 ω7c and/or iso-C15:0 2-OH), iso-C15:1 G, iso-C15:0 and iso-C17:0 3-OH as the major cellular fatty acids. Strain 190524A02bT contained summed feature 3 (comprising C16:1 ω7c and/or iso-C15:0 2-OH), iso-C15:0, iso-C15:1 G and iso-C17:0 3-OH as the major cellular fatty acids. Strain 190130A14aT contained iso-C15:1 G, summed feature 3 (comprising C16:1 ω7c and/or iso-C15:0 2-OH), iso-C15:0 and iso-C17:0 3-OH as the major cellular fatty acids. Based on the phenotypic and molecular features, these three strains represent novel species of the genus Tenacibaculum for which the names Tenacibaculum platacis sp. nov., with 190524A05cT (= CIP 112470T = DSM 118113T) as the type strain; Tenacibaculum vairaonense sp. nov., with 190524A02bT (= CIP 112469T = DSM 118112T) as the type strain; and Tenacibaculum polynesiense sp. nov., with 190130A14aT (= CIP 112468T = DSM 118111T) as the type strain, are proposed