Article
Geography, Physical
Jean-Paul Deroin, Alexandra Guillaneuf, Sebastien Laratte
Summary: The main objectives of this study were to analyze the morphological and geological units of the tidal flats in Baie des Veys in France, study the nature and distribution of sediments, identify the causes of variations, and evaluate the long-term sediment balance and its connection to environmental changes. The area is facing sea level rise and has implemented specific measures to address it.
ZEITSCHRIFT FUR GEOMORPHOLOGIE
(2022)
Article
Computer Science, Interdisciplinary Applications
Sarah Manteaux, Sabine Sauvage, Rene Samie, Reline Monteil, Josette Garnier, Vincent Thieu, Roxelane Cakir, Jose-Miguel Sanchez-Perez
Summary: Representation of biogeochemical in-stream processes is complex and requires the use of models. In this study, the biogeochemical model RIVE was integrated into the SWAT model to improve the representation of in-stream ecological processes. The model successfully matched observed data and assessed dominant processes for major water quality variables.
ENVIRONMENTAL MODELLING & SOFTWARE
(2023)
Article
Geosciences, Multidisciplinary
Dmitry V. Sein, Anton Y. Dvornikov, Stanislav D. Martyanov, William Cabos, Vladimir A. Ryabchenko, Matthias Groeger, Daniela Jacob, Alok Kumar Mishra, Pankaj Kumar
Summary: This study investigates the impact of variable marine biogeochemical light absorption on sea surface temperature and the South Asian climate. The results show that when variable light absorption is considered, the average sea surface temperature decreases in most of the Indian Ocean, especially during the monsoon season. Other effects include cooling of subsurface layers and increased phytoplankton primary production.
EARTH SYSTEM DYNAMICS
(2022)
Article
Environmental Sciences
Prima Anugerahanti, Onur Kerimoglu, S. Lan Smith
Summary: The study evaluates different biogeochemical models for phytoplankton growth response, finding that models with fixed stoichiometry are more sensitive to external parameter variations, but the fixed stoichiometry model with photoacclimation can better capture chlorophyll observations when individually tuned. Models with variable C:N ratio perform better in cross-validation experiments, indicating they are more portable.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
C. Seceh, C. Pinazo, M. Rodier, K. Lajaunie-Salla, C. Mazoyer, C. Grenz, R. Le Gendre
Summary: The biogeochemical model ECO3M-Atoll was utilized to simulate the lower food web in Ahe Atoll lagoon, specifically focusing on nitrogen-limited phytoplankton dynamics. The model parameters were based on in situ observations and tested against different hypotheses about nitrogen cycling, showing close agreement between simulated and observed values for phytoplankton biomass and nitrogen concentrations, as well as biogeochemical processes like primary production and nitrogen uptake.
MARINE POLLUTION BULLETIN
(2021)
Article
Geosciences, Multidisciplinary
Katherine M. Smith, Skyler Kern, Peter E. Hamlington, Marco Zavatarelli, Nadia Pinardi, Emily F. Klee, Kyle E. Niemeyer
Summary: The newly developed BFM17 model is complex and flexible enough to capture open-ocean ecosystem dynamics with its 17 state variables, suitable for high-resolution numerical simulations and parameter optimization studies. Validation with observational data shows that BFM17 performs well, accurately simulating subsurface chlorophyll maximum and bloom intensity.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2021)
Article
Environmental Sciences
Chan Shu, Peng Xiu, Xiaogang Xing, Guoqiang Qiu, Wentao Ma, Robert J. W. Brewin, Stefano Ciavatta
Summary: Marine biogeochemical models play a crucial role in understanding ecosystem dynamics and biogeochemical cycles. Data assimilation is an essential tool to reduce model uncertainty and improve predictability. This study evaluates the value of assimilating BGC-Argo measurements and satellite-derived PFT data in a biogeochemical model in the northern South China Sea. The results show that assimilating satellite-derived PFT data improves the modeled total chlorophyll-a concentration and individual phytoplankton groups at the surface. Combining satellite data with BGC-Argo data further improves the vertical distributions of chlorophyll-a and POC.
Article
Ecology
Anitha Gera, R. Gayathri, P. Ezhilarasan, V. Ranga Rao, M. V. Ramana Murthy
Summary: An eddy resolving 1/12 degrees coupled physical biogeochemical ocean model was used to study the upwelling off the west coast of India, the dynamics of the south eastern Arabian Sea and the associated mechanisms. The model reproduced the features of the upwelling system and its physical and biogeochemical processes. The experiments showed that rainfall and river runoff influenced the phytoplankton concentrations and size distribution. Rainfall affected nanoplankton concentrations while river runoff affected diatom concentrations. Freshwater from rainfall shoaled the mixed layer and thermocline, reducing upwelling and nutrient and chlorophyll concentrations. Thinner and warmer mixed layer modified thermodynamics and influenced zooplankton by altering mesozooplankton grazing. River runoff supplied nutrients, reducing diatom and increasing nanoplankton concentrations, thus increasing the preferred prey of zooplankton. Phosphorous limitation was found in the region. The biophysical controls linking ecological responses to freshwater were discussed.
ECOLOGICAL MODELLING
(2023)
Article
Mathematical & Computational Biology
Lidan Liu, Meng Fan, Yun Kang
Summary: The variation of nutrient supply affects the biomass, productivity, and evolutionary dynamics of phytoplankton. Nutrient supply, rather than temperature, is considered a dominant factor in reducing phytoplankton cell size. A size-dependent nutrient-phytoplankton model is used to study the effects of nutrient supply on phytoplankton size and functional trait evolution. Results show that nutrient concentration and vertical mixing rate significantly influence cell size evolution, and reduced nutrient input due to climate warming will lead to smaller cell size and reduced phytoplankton diversity.
MATHEMATICAL BIOSCIENCES AND ENGINEERING
(2023)
Article
Oceanography
Michael S. Dinniman, Pierre St-Laurent, Kevin R. Arrigo, Eileen E. Hofmann, Gert L. van Dijken
Summary: The upward advection or mixing of iron-rich deep waters driven by the rate of basal ice shelf melt is a primary control on chlorophyll a production in coastal polynyas over the Antarctic continental shelf. This study examined the effects of projected atmospheric changes in 2100 on this relationship using a 5-km resolution ocean/sea ice/ice shelf model. The modified atmospheric conditions resulted in increased heat advection onto the continental shelf, increased basal ice shelf melt, and increased dissolved iron supply to the surface waters.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Environmental Sciences
Qiong Wu, Xiaochun Wang, Peng Xiu, Fei Chai, Zhongxiao Chen
Summary: This study systematically investigated the sensitivity of phytoplankton growth rate to temperature using a physical-biogeochemical coupled model for the Yangtze River estuary. The results showed that a specific growth rate equation from Geider's work, which reaches a maximum at 22 degrees C and remains constant with higher temperature, can accurately reproduce the seasonal variation of chlorophyll concentration.
Article
Environmental Sciences
Bo Ram Kim, Sang-Il Lee, Su Min Yu
Summary: This study proposes a methodology for the conjunctive use of a sand dam and groundwater well in mountainous regions vulnerable to drought. The study applied the method to a small mountainous area in South Korea and found that the conjunctive use of a sand dam and groundwater well increases the reliability of water supply, especially during drought conditions. With appropriate resource allocation, 100% water supply reliability could be achieved, even for long-term droughts.
Article
Mathematics
Alexander Sukhinov, Yulia Belova, Alla Nikitina, Valentina Sidoryakina
Summary: This article presents a three-dimensional mathematical model of population dynamics based on non-stationary parabolic advection-diffusion-reaction equations. The article focuses on the analytical study of the initial-boundary value problem corresponding to this model and validates the model through numerical experiments. The developed model is useful for assessing the reproduction process of valuable and commercial fish in shallow water bodies.
Article
Hematology
Sigismond Lasocki, D. Delahaye, D. Fuks, P. H. Savoie, C. Dussart, A. Hofmann, P. Paubel
Summary: This study aims to estimate the one-year budget impact of Patient Blood Management (PBM) in four elective surgical areas in France. The results show that implementing PBM programs could generate annual savings up to euro1079 M from the French National Health Insurance perspective (euro1018 M from the hospital perspective), and the sparing of 181,451 red blood cells units per year.
Article
Economics
Jingyan Yang, Rongzhe Liu, Anna Granghaud, Omer Zaidi, Jennifer Stephens
Summary: This study evaluated the financial impact of introducing a new pegfilgrastim biosimilar (NYVEPRIA) from a French healthcare system perspective. The results indicated that the introduction of NYVEPRIA could potential lead to substantial cost savings for the French healthcare system.
JOURNAL OF MEDICAL ECONOMICS
(2021)
Article
Multidisciplinary Sciences
Marine Ballutaud, Morgane Travers-Trolet, Paul Marchal, Stanislas F. Dubois, Carolina Giraldo, Andrew C. Parnell, M. Teresa Nuche-Pascual, Sebastien Lefebvre
Summary: Stable isotope mixing models are used to reconstruct animal diet, but current research neglects the dynamics of isotopic ratios and the impact of time lag on diet reconstruction. By using a dynamic mixing model, it is possible to more accurately estimate the consumer's diet and avoid misinterpretation in ecosystem functioning and food-web structure analysis.
Article
Fisheries
Philippe Cugier, Yoann Thomas, Cedric Bacher
Summary: This study uses a 3D model to predict the growth and production of oysters in the French Atlantic coast and analyzes the effects of aquaculture practices, environmental variability, and mortality events on production. The results show that shellfish farmers can quickly recover production levels by using a management tool in the form of response functions.
AQUACULTURE ENVIRONMENT INTERACTIONS
(2022)
Article
Multidisciplinary Sciences
Monica Michel-Rodriguez, Sebastien Lefebvre, Muriel Crouvoisier, Xavier Meriaux, Fabrice Lizon
Summary: The study focused on how natural phytoplankton adjust their photosynthetic properties in response to underwater light conditions, with particular attention to blue light wavelengths. The results showed that phytoplankton were in a photoprotective state for blue light, but not for other wavelengths, indicating a wavelength-specific response to light quality.
Article
Environmental Sciences
Nicolas Merou, Cyrielle Lecadet, Tom Billon, Bruno Chollet, Stephane Pouvreau, Isabelle Arzul
Summary: In this study, an Environmental DNA (eDNA)-based method was developed to detect and quantify M. refringens parasite DNA in seawater and sediment. By using light and transmission microscopy, it was found that sporangia of M. refringens released from infected oysters can survive up to 20 days in both seawater and oyster feces.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Serge Andrefouet, Alain Lo-Yat, Sebastien Lefebvre, Oceane Bionaz, Vetea Liao
Summary: This editorial presents the results of the MANA project, which focuses on the development of knowledge and management tools for pearl farming atolls in French Polynesia. The collection of 14 articles covers various thematic tasks described in the initial project, contributing to the applied objectives in this field.
MARINE POLLUTION BULLETIN
(2022)
Article
Ecology
Alana Correia-Martins, Rejean Tremblay, Beatrice Bec, Cecile Roques, Ariane Atteia, Angelique Gobet, Marion Richard, Masami Hamaguchi, Toshihiro Miyajima, Masakazu Hori, Gilles Miron, Stephan Pouvreau, Franck Lagarde
Summary: This study describes the drivers of ecological events that led to recruitment failure of the Pacific oyster during a heatwave. Results show that elevated temperatures and salinity caused changes in food availability and affected the post-metamorphosis success of oyster larvae. These findings suggest that the ecological limits of oyster larvae are narrower than their physiological limits, particularly under the context of marine heatwaves.
MARINE ECOLOGY PROGRESS SERIES
(2022)
Article
Environmental Sciences
Sebastien Lefebvre, Charles Verpoorter, Martine Rodier, Nathanael Sangare, Serge Andrefouet
Summary: This study demonstrates the potential of using remote sensing to monitor the trophic status of deep pearl farming lagoons and assist in aquaculture management.
MARINE POLLUTION BULLETIN
(2022)
Article
Environmental Sciences
Romina Vanessa Barbosa, Marion Jaud, Cedric Bacher, Yann Kerjean, Fred Jean, Jerome Ammann, Yoann Thomas
Summary: In this study, drone surveys were used to characterize the distribution of mussel aggregations and evaluate the role of topographic features in determining their distribution. The results showed that topographic features and intertidal height were the main factors influencing mussel distribution. The study highlights the advantage of using high-resolution drone images to study ecological processes in intertidal ecosystems.
Article
Environmental Sciences
Anna Hughes, Kruno Bonacic, Tom Cameron, Ken Collins, Fiz da Costa, Alison Debney, Luca van Duren, Jesper Elzinga, Jose M. Farinas-Franco, Celine Gamble, Luke Helmer, Zoe Holbrook, Eric Holden, Katherine Knight, James A. J. Murphy, Bernadette Pogoda, Stephane Pouvreau, Joanne Preston, Alec Reid, Emilie Reuchlin-Hugenholtz, William G. Sanderson, David Smyth, Brecht Stechele, Asa Strand, John A. Theodorou, Matt Uttley, Ben Wray, Philine S. E. zu Ermgassen
Summary: The European native oyster is a threatened keystone species that historically created biogenic habitats in European seas. Overfishing, habitat destruction, pollution, and other factors have caused the functional extinction of native oyster habitat. However, restoration efforts are gaining momentum, and factors like abiotic, socio-economic, and logistical considerations are important in site selection for restoration projects.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2023)
Review
Oceanography
Clara Menu, Laure Pecquerie, Cedric Bacher, Mathieu Doray, Tarek Hattab, Jeroen van der Kooij, Martin Huret
Summary: Small pelagic fish in European seas have been decreasing in size and body condition over the past two decades, with recent studies suggesting a bottom-up control. To better understand how the environment affects these fish, a comparative approach was used to study European anchovy and sardine in the Northeast Atlantic and Mediterranean Sea. Bioenergetic models based on the Dynamic Energy Budget theory were developed and calibrated, showing that temperature and zooplankton play a significant role in regional growth differences. However, the decrease in size observed in the Bay of Biscay and Gulf of Lion could not be fully explained by lower trophic levels models, suggesting a decrease in zooplankton quality as a possible driver.
PROGRESS IN OCEANOGRAPHY
(2023)
Article
Immunology
Nicolas Merou, Cyrielle Lecadet, Martin Ubertini, Stephane Pouvreau, Isabelle Arzul
Summary: This study investigated the dynamics of M. refringens and B. ostreae in Rade of Brest, France. M. refringens was found to be present in flat oysters and all sampled environmental compartments, indicating its wider environmental distribution. In contrast, B. ostreae had low prevalence in flat oysters and was rarely detected in planktonic and benthic compartments. Planktonic and benthic compartments play a key role in the transmission and overwintering of M. refringens.
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
(2023)
Review
Fisheries
Stephane Pouvreau, Sylvie Lapegue, Isabelle Arzul, Pierre Boudry
Summary: In the past fifty years, numerous research projects have been conducted in France to revive the aquaculture production of the native European flat oyster Ostrea edulis, as well as to study the ecology of local remnant beds and reefs. These projects have focused on controlled reproduction and hatchery technology, understanding and controlling diseases, and developing resistant lines through genetics. This article provides an overview of the major outcomes of these projects in France and discusses prospects for future work in line with the Native Oyster Restoration Alliance and UN Decade for Ecosystem Restoration.
AQUATIC LIVING RESOURCES
(2023)
Review
Oceanography
Lola De Cubber, Sebastien Lefebvre, Theo Lancelot, Daniel Schaffer Ferreira Jorge, Sylvie Marylene Gaudron
Summary: This study investigated the population dynamics of two intertidal ecosystem engineers by coupling Dynamic Energy Budget models with Individual-Based Models. The study found that the performance of the species varied with latitude, with northern sites performing better. Environmental factors had significant impacts on population dynamics and onshore processes.
PROGRESS IN OCEANOGRAPHY
(2023)
Article
Multidisciplinary Sciences
Junyong You, Liangju Yu, Julien Meillon, Aline Gangnery, Cedric Bacher, Hui Liu, Oivind Strand
Summary: This article introduces a set of web-based tools that meet spatial planning demands and help determine suitable space for marine aquaculture activities. These tools are derived from the AkvaVis concept and have been adapted and applied in different national aquaculture contexts. The tools share common features and also have some differences, providing flexibility for future applications.
Article
Biodiversity Conservation
Coralie Broquard, Theo Lancelot, Sebastien Lefebvre, Lucie Courcot, Sylvie M. Gaudron
Summary: This study found that temperature affects the metabolic rates of Arenicola marina larvae during their life cycle, with the larvae performing best at a temperature of 15 degrees Celsius.
CONSERVATION PHYSIOLOGY
(2022)