A5016089011- Geology and Paleoclimatology Research
- Marine Biology and Ecology Research
- Isotope Analysis in Ecology
- Microbial Community Ecology and Physiology
- Marine and environmental studies
- Paleontology and Stratigraphy of Fossils
- Geochemistry and Geologic Mapping
- Marine and coastal ecosystems
- Heavy metals in environment
- Geochemistry and Elemental Analysis
- Geophysics and Gravity Measurements
- Methane Hydrates and Related Phenomena
- Protist diversity and phylogeny
- Earthquake Detection and Analysis
- Odor and Emission Control Technologies
Lund University
2022-2025
Institut Méditerranéen d’Océanologie
2024-2025
Aix-Marseille Université
2025
Le Mans Université
2022
Centre National de la Recherche Scientifique
2020-2022
Nantes Université
2022
Laboratoire de Planétologie et Géosciences
2020-2022
Université Nantes Angers Le Mans
2022
Université d'Angers
2021
Abstract. Oxygen and nitrate availabilities impact the marine nitrogen cycle at a range of spatial temporal scales. Here, we demonstrate denitrifying foraminifera on two oxygen contrasting stations in fjord environment (Gullmar Fjord, Sweden). Denitrification by benthic was determined through combination specific density counting per microhabitat respiration rates obtained incubation experiments using N2O microsensors. Benthic removal calculated from submillimeter chemical gradients...
Human activities in coastal areas have intensified over the last 200 years, impacting also high-latitude regions such as Baltic Sea. Benthic foraminifera, protists often with calcite shells (tests), are typically well preserved marine sediments and known to record past bottom-water conditions. Morphological analyses of acquired by microcomputed tomography (µCT) made significant progress toward a better understanding recent environmental changes. However, limited access data processing lack...
Abstract. A growing body of observations reveals rapid changes in both the total inventory and distribution marine oxygen over later half 21st century, leading to increased interest extending oxygenation records into past. Use paleo-oxygen proxies have potential extend spatial temporal range current records, bound pre-anthropogenic baselines, provide datasets necessary test climate models under different boundary conditions, ultimately understand how ocean responds beyond decadal scale...
Abstract. A growing body of observations has revealed rapid changes in both the total inventory and distribution marine oxygen over latter half 20th century, leading to increased interest extending oxygenation records into past. The use paleo-oxygen proxies potential extend spatial temporal range current records, constrain pre-anthropogenic baselines, provide datasets necessary test climate models under different boundary conditions, ultimately understand how ocean responds beyond...
Abstract Marine environments worldwide are increasingly threatened by warming, deoxygenation, and ocean acidification. These stressors can be recorded as alterations in foraminiferal geochemistry morphology. We integrated morphological features with assemblage geochemical records of benthic foraminifera from the Danish Straits at entrance to Baltic Sea, covering Last Interglacial period (LIG, MIS5e), assess potential indications environmental changes. Using synchrotron radiation X‐ray...
Marine environments worldwide are increasingly threatened by warming, deoxygenation, and ocean acidification. Foraminifera may respond to these stressors altering their test geochemistry morphology. We integrated morphological features with assemblage geochemical records of benthic foraminifera from the Danish Straits at entrance Baltic Sea, covering Last Interglacial period (LIG, MIS5e), assess potential indications environmental changes. Using synchrotron radiation X-ray microcomputed...
Coastal environments are exposed to numerous pressures that potentially affect marine soft bottom faunas. Among these pressures, organic matter enrichment is very frequent. Several indices based on living (Rose Bengal-stained) foraminiferal communities have recently been developed assess the induced impact and determine environmental quality of environments. Here, we use an open waters Mediterranean Sea data set test benefits drawbacks four indices: (1) effective number species (exp(H’bc)),...
Abstract In mudflats, interactions and transfers of nutrients secondary metabolites may drive ecosystems biodiversity. Foraminifera have complex trophic strategies as they often rely on bacteria eukaryotes or potential symbionts for carbon nitrogen resources. The capacity these protists to use a wide range adaptive mechanisms requires clarifying the relationships between them their microbial associates. Here, we investigate three foraminiferal species with nearby organisms in situ, by...
Ca. Scalindua profunda' anammox hypoxia/anoxia, O 2 <20µmol
Abstract. Oxygen availability impacts the marine nitrogen cycle at a range of spatial and temporal scales. Invasive organisms have shown to sustainably affect sediment geochemistry benthic ecology. Nonionella sp. T1 was recently described as an invasive foraminifer in North Sea region. Here, we demonstrate impact this denitrifying species on foraminifera fauna Gullmar Fjord (Sweden). The contribution denitrification estimated by coupling living micro-distribution, rate measurement...
&lt;p&gt;Foraminifera are single-celled organisms, and part of protists. They present in all types environments, though most foraminifera marine benthic found from the deep ocean to intertidal zone. Thus, subjected various environmental stresses, (natural or anthropogenic). Because their rapid response stresses strong resistance, studied as paleo-environmental indicators. However, little is currently known about biology, specifically metabolism physiology. Some species notably...