A5048232718- Arsenic contamination and mitigation
- Paleontology and Stratigraphy of Fossils
- Geochemistry and Geologic Mapping
- Water Quality and Pollution Assessment
- Groundwater and Isotope Geochemistry
- Heavy metals in environment
- Geochemistry and Elemental Analysis
- Mine drainage and remediation techniques
- Geology and Paleoclimatology Research
- Wildlife Ecology and Conservation
- Microbial Community Ecology and Physiology
- Atmospheric and Environmental Gas Dynamics
- Diatoms and Algae Research
- Metal Extraction and Bioleaching
- Animal Behavior and Welfare Studies
- Methane Hydrates and Related Phenomena
- Marine and coastal ecosystems
- Smart Materials for Construction
- Soil and Water Nutrient Dynamics
- Geological and Geochemical Analysis
- Aquatic and Environmental Studies
- Geological and Geophysical Studies
- Primate Behavior and Ecology
- Concrete and Cement Materials Research
- Invertebrate Taxonomy and Ecology
Université Paris Cité
2019-2023
Institut de physique du globe de Paris
2019-2023
Centre National de la Recherche Scientifique
2019-2021
Duke University
2020
Texas A&M University
2017-2018
Oak Ridge National Laboratory
1997
Palisade fabric is a ubiquitous texture of silica sinter found in low temperature (<40°C) regimes hot spring environments, and it formed when populations filamentous microorganisms act as templates for polymerization. Although known that postdepositional processes such biological degradation dewatering can strongly affect preservation these fabrics, the impact extreme aridity has so far not been studied detail. Here, we report detailed analysis recently silicified palisade fabrics from...
Environmental contextArsenic contamination of groundwater is a major environmental problem in many areas the world. In south-east Asia, iron-rich reducing mixes with oxidising river water hyporheic zones, precipitating iron oxides. These oxides can act as natural reactive barrier capable accumulating elevated solid-phase concentrations arsenic. AbstractShallow, anoxic aquifers within Ganges–Brahmaputra–Meghna Delta (GBMD) commonly contain arsenic (As), (Fe) and manganese (Mn). Highly...
As a keystone megafaunal species, African forest elephants (Loxodonta cyclotis) influence the structure and composition of tropical forests. Determining links between food resources, environmental conditions elephant movement behavior is crucial to understanding their habitat requirements effects on ecosystem, particularly in face poaching global change. We investigate whether fruit abundance or climate most strongly at landscape scale Gabon. Trained teams 'elephant trackers' performed daily...
Abstract In silica‐rich hot spring environments, internally laminated, digitate sinter deposits are often interpreted as bio‐mediated structures. The organic components of microbial communities (cell surfaces, sheaths and extracellular polymeric substances) can act templates for silica precipitation, therefore influencing morphogenesis. addition to biologic surface‐templating effects, various microenvironmental factors (hydrodynamics, local pH fluctuating wind patterns) also influence the...
Abstract Microbial mats floating within multiple hydrothermally sourced streams in El Tatio, Chile, frequently exhibit brittle siliceous crusts (~1 mm thick) above the air–water interface. The partially silicified contain a diverse assemblage of microbial clades and metabolisms, including cyanobacteria performing oxygenic photosynthesis. Surficial are composed several amorphous silica layers containing well‐preserved filaments (most likely cyanobacteria) other cellular textures overlying...
Abstract Recent experimental studies have demonstrated that clay minerals (e.g., kaolinite, illite, and montmorillonite) higher affinities for some trace elements under acidic versus alkaline conditions. This suggests clays might be important vectors in the transport of from sites chemical weathering on land to marine depositional environments. To determine if behave similarly nature, we collected water mud (consisting 38.5%–61.1% kaolinite samples boiling, low‐pH, pools venting at El Tatio...