A5068659503- Marine and coastal ecosystems
- Microbial Community Ecology and Physiology
- Marine Bivalve and Aquaculture Studies
- Marine Biology and Ecology Research
- Ocean Acidification Effects and Responses
- Heavy metals in environment
- Mercury impact and mitigation studies
- Geochemistry and Elemental Analysis
- Atmospheric chemistry and aerosols
- Bacteriophages and microbial interactions
- Air Quality and Health Impacts
- Coral and Marine Ecosystems Studies
- Methane Hydrates and Related Phenomena
- Coastal and Marine Management
- Aquatic Ecosystems and Phytoplankton Dynamics
- Coastal wetland ecosystem dynamics
- Environmental DNA in Biodiversity Studies
- Microplastics and Plastic Pollution
- Oceanographic and Atmospheric Processes
- Toxic Organic Pollutants Impact
- Marine and coastal plant biology
- Genomics and Phylogenetic Studies
- Coastal and Marine Dynamics
- Algal biology and biofuel production
- Oil Spill Detection and Mitigation
Aix-Marseille Université
2014-2024
Institut Méditerranéen d’Océanologie
2007-2024
Université de Toulon
2014-2024
Institut de Recherche pour le Développement
2014-2024
Centre National de la Recherche Scientifique
2014-2024
Hanoi University of Science and Technology
2019-2024
Vietnam Academy of Science and Technology
2018-2024
Chulalongkorn University
2024
Laboratoire d’Océanographie de Villefranche
2001-2018
Sorbonne Université
2015-2018
The abundance, size distribution and bacterial colonization of transparent exopolymeric particles (TEP) were monitored in the Kattegat (Denmark) at weekly intervals throughout spring (February-May) encompassing diatom bloom. These recently discovered are believed to be formed from colloidal organic material exuded by phytoplankton bacteria, may have significant implications for pelagic flux processes. During this study, number concentration TEP (>1 μm) ranged 3 × 103 6 104 ml−1 volume...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 183:59-71 (1999) - doi:10.3354/meps183059 Carbon content and C:N ratio of transparent exopolymeric particles (TEP) produced by bubbling exudates diatoms Xavier Mari* Danish Institute for Fisheries Research, Department Coastal Ecology, Kavalergården 6, DK-2920 Charlottenlund, Denmark *Present address:...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 163:63-76 (1998) - doi:10.3354/meps163063 Seasonal size spectra of transparent exopolymeric particles (TEP) in a coastal sea and comparison with those predicted using coagulation theory Xavier Mari1,*, Adrian Burd2 1Danish Institute for Fisheries Research, Department Coastal Ecology, Kavalergården 6, DK-2920...
Summary Extracellular polysaccharide aggregates, operationally defined as transparent exopolymeric particles (TEP), are recognized an important conduit for carbon recycling and export in aquatic systems. Yet, the factors controlling build‐up of TEP pool not well characterized. Here we show that increased production by Trichodesmium , oceanic bloom‐forming nitrogen‐fixing (diazotrophic) cyanobacterium, is coupled with autocatalytic programmed cell death (PCD) process. We demonstrate PCD...
Viral abundance and processes in the water column sediments are well studied for some systems; however, we know relatively little about virus-host interactions on particles how influence these interactions. Here review virus-prokaryote inorganic organic column. Profiting from recent methodological progress, show that confocal laser scanning microscopy combination with lectin nucleic acid staining is one of most powerful methods to visualize distribution viruses their hosts such as...
The pools of dissolved (DOM) and particulate organic matter (POM) transparent exopolymeric particles (TEP) were studied along two sampling gradients in the lagoon New Caledonia relation to residence time water masses. efficiency transfer material from phase via TEP formation, indicating physicochemical reactivity matter, was investigated. DOM, POM, concentration increased gradients, but their relative proportions varied. contribution pool POM 20% 60%, most oligotrophic stations more...
Abstract. The absorption of anthropogenic atmospheric carbon dioxide (CO2) by the ocean provokes its acidification. This acidification may alter several oceanic processes, including export biogenic from upper layer ocean, hence providing a feedback on rising concentrations. effect seawater transparent exopolymeric particles (TEP) driven aggregation and sedimentation processes were investigated studying interactions between latex beads TEP precursors collected in lagoon New Caledonia. A...
A comprehensive chemical characterization of fine particulate matter (PM
The surfaces of most pelagic diatoms are sticky at times and may therefore form rapidly settling aggregates by physical coagulation. Stickiness aggregate formation be particularly adaptive in upwelling systems allowing the retention diatom populations vicinity center. We hypothesized that blooms terminated rapid sedimentation. monitored development a maturing (mainly Chaetoceros spp.) bloom Benguela current during 7 d February. Chlorophyll concentrations remained consistently high...
The stoichiometric model of Redfield, which describes the elemental composition marine organic matter, is generally used to link production new matter uptake nitrate. Redfield C:N molar ratio 6.6 a well‐established value for particulate produced in surface waters. Yet recent studies have shown that inorganic during nitrate‐limiting conditions >14. This non‐Redfield behavior suggests large standing stock rich carbon, should accumulate euphotic zone from spring bloom late summer....
AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 50:221-229 (2008) - DOI: https://doi.org/10.3354/ame01158 Phytoplankton-bacterioplankton coupling in a subtropical South Pacific coral reef lagoon E. J. Rochelle-Newall1,2,*, J.-P. Torréton1,2, X. Mari1, O. Pringault1 1UR 103, CAMELIA, Centre IRD Nouméa, BP A5, New Caledonia 2Present address: ECOLAG, UMR 5119, Université...
Abstract Large amounts of soot are continuously deposited on the global ocean. Even though significant concentrations particles found in marine waters, effects these aerosols ocean ecosystems currently unknown. Using a combination situ and experimental data, results from an atmospheric transport model, we show that deposition oil‐fired power plant impacted biogeochemical properties functioning pelagic ecosystem tropical oligotrophic oceanic waters off New Caledonia. Deposition was followed...
Viruses on organic aggregates such as transparent exopolymeric particles (TEP) are not well investigated. The number of TEP-attached viruses was assessed along trophic gradients in the southwestern lagoon New Caledonia by determining fraction removed after magnetic isolation TEP. In order to isolate TEP magnetically, were formed presence beads from submicrometer precursors collected gradients. mixed TEP-beads-viruses solution with a field. percentage associated newly averaged 8% (range, 3...
Although many studies have addressed the role of bacteria in degradation organic matter, few examined how alter physicochemical properties dissolved and colloidal matter coastal systems. Here, we investigate sticking transparent exopolymeric particles (TEP) varied with DOM age batch cultures. We show that two contrasted sites, despite different initial TEP bulk concentrations, after 48 h, were similar increased (i.e. became stickier) increasing age. propose occurring h incubation are mainly...