A5054475023- Marine and coastal ecosystems
- Arctic and Antarctic ice dynamics
- Immune Cell Function and Interaction
- Atmospheric and Environmental Gas Dynamics
- T-cell and B-cell Immunology
- Oceanographic and Atmospheric Processes
- Marine Biology and Ecology Research
- Methane Hydrates and Related Phenomena
- Immunotherapy and Immune Responses
- Ocean Acidification Effects and Responses
- Water Quality Monitoring and Analysis
- Cancer Immunotherapy and Biomarkers
- Atmospheric chemistry and aerosols
- CAR-T cell therapy research
- Marine and coastal plant biology
- Calibration and Measurement Techniques
- Cancer, Stress, Anesthesia, and Immune Response
- Climate change and permafrost
- Marine and fisheries research
- Isotope Analysis in Ecology
- Coral and Marine Ecosystems Studies
- Oil Spill Detection and Mitigation
- Cryospheric studies and observations
- Remote Sensing in Agriculture
- Arctic and Russian Policy Studies
Université du Québec à Rimouski
2015-2024
La Jolla Institute for Immunology
2014-2024
VIR Biotechnology (United States)
2022-2024
Université Laval
1991-2023
Université de Montréal
1999-2023
Université du Québec à Montréal
2023
ArcticNet
2023
Research Management (Norway)
2023
University of Manitoba
2023
Biologie des Organismes et Écosystèmes Aquatiques
2019
Limited knowledge is available on the relationship between antigen-specific immune responses and COVID-19 disease severity. We completed a combined examination of all three branches adaptive immunity at level SARS-CoV-2-specific CD4
Significantly higher levels of plasma CXCL13 [chemokine (C-X-C motif) ligand 13] were associated with the generation broadly neutralizing antibodies (bnAbs) against HIV in a large longitudinal cohort HIV-infected individuals. Germinal centers (GCs) perform remarkable task optimizing B-cell Ab responses. GCs are required for almost all receptor affinity maturation and will be critical parameter to monitor if bnAbs induced by vaccination. However, lymphoid tissue is rarely available from...
Continental runoff is a major source of freshwater, nutrients and terrigenous material to the Arctic Ocean. As such, it influences water column stratification, light attenuation, surface heating, gas exchange, biological productivity carbon sequestration. Increasing river discharge thawing permafrost suggest that impacts continental on these processes are changing. Here, new optical proxy was developed implemented with remote sensing determine first pan-Arctic distribution dissolved organic...
Atmospheric correction over inland and coastal waters is one of the major remaining challenges in aquatic remote sensing, often hindering quantitative retrieval biogeochemical variables analysis their spatial temporal variability within environments. The Correction Intercomparison Exercise (ACIX-Aqua), a joint NASA – ESA activity, was initiated to enable thorough evaluation eight state-of-the-art atmospheric (AC) processors available for Landsat-8 Sentinel-2 data processing. Over 1000...
Abstract. Predicting water-column phytoplankton biomass from near-surface measurements is a common approach in biological oceanography, particularly since the advent of satellite remote sensing ocean color (OC). In Arctic Ocean, deep subsurface chlorophyll maxima (SCMs) that significantly contribute to primary production (PP) are often observed. These neither detected by sensors nor accounted for models applied Ocean. Here, we assemble large database pan-Arctic observations (i.e., 5206...
Natural killer (NK) cell clearance of tumor emboli following surgery is thought to be vital in preventing postoperative metastases. Using a mouse model surgical stress, we transferred surgically stressed NK cells into NK-deficient mice and observed enhanced lung metastases tumor-bearing as compared with that received untreated cells. These results establish play crucial role mediating surgery. Surgery markedly reduced total numbers the spleen affected migration. Ex vivo killing by were...
ABSTRACT Clostridium difficile is the major causative agent of nosocomial antibiotic-associated diarrhea, colitis, and pseudomembranous colitis. The pathogenicity C. closely related to production toxins A B. Toxigenic detection by a tissue culture cytotoxin assay often considered “gold standard.” However, this time consuming, as it implies an incubation period at least 24 h. We have developed rapid real-time fluorescence-based multiplex PCR targeting toxin genes tcdA tcdB , with Smart...
[1] The effects of changing ice and atmospheric conditions on the upwelling deep nutrient-laden waters biological productivity in coastal Beaufort Sea were quantified using a unique combination situ remote-sensing approaches. Repeated instances ablation during fall 2007 summer 2008 multiplied production algae, phytoplankton, zooplankton benthos by 2 to 6 fold. Strong wind forcing failed induce upward shifts stratified off shelf.
Abstract. The Arctic Ocean and its marginal seas are among the marine regions most affected by climate change. Here we present results of a diagnostic model used to assess primary production (PP) trends over 1998–2010 period at pan-Arctic, regional local (i.e. 9.28 km resolution) scales. Photosynthetically active radiation (PAR) above below sea surface was estimated using precomputed look-up tables spectral irradiance, taking as input satellite-derived cloud optical thickness fraction...
Abstract. The Maritime Aerosol Network (MAN) has been collecting data over the oceans since November 2006. Over 80 cruises were completed through early 2010 with deployments continuing. Measurement areas included various parts of Atlantic Ocean, Northern and Southern Pacific South Indian Arctic Ocean inland seas. MAN deploys Microtops hand-held sunphotometers utilizes a calibration procedure processing traceable to AERONET. Data collection that previously had no aerosol optical depth (AOD)...
Abstract We investigated 32 net primary productivity (NPP) models by assessing skills to reproduce integrated NPP in the Arctic Ocean. The were provided with two sources each of surface chlorophyll‐ a concentration (chlorophyll), photosynthetically available radiation (PAR), sea temperature (SST), and mixed‐layer depth (MLD). most sensitive uncertainties chlorophyll, generally performing better situ chlorophyll than satellite‐derived values. They much less PAR, SST, MLD, possibly due...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 497:39-49 (2014) - DOI: https://doi.org/10.3354/meps10587 Role of environmental factors on phytoplankton bloom initiation under landfast sea ice in Resolute Passage, Canada C. J. Mundy1,2,*, Michel Gosselin2, Yves Gratton3, Kristina Brown4, Virginie Galindo5, Karley Campbell1, Maurice Levasseur5, David...
The distribution and quality of water resources vary dramatically across Canada, human impacts such as land-use climate changes are exacerbating uncertainties in supply security. At the national level, Canada has no enforceable standards for safe drinking comprehensive water-monitoring program to provide detailed, timely reporting on state resources. To Canada's first assessment lake health, NSERC Canadian Lake Pulse Network was launched 2016 an academic-government research partnership....
Phytoplankton and sea ice algae are traditionally considered to be the main primary producers in Arctic Ocean. In this Perspective, we explore importance of benthic (BPPs) encompassing microalgae, macroalgae, seagrasses, which represent a poorly quantified source marine production. Despite scarce observations, models predict that BPPs widespread, colonizing ~3 million km 2 extensive coastal shelf seas. Using synthesis published data novel model, estimate currently contribute ~77 Tg C y −1...
Photomineralization of terrigenous dissolved organic matter (tDOM) in the Arctic Ocean is limited by persistent sea ice cover that reduces amount ultraviolet (UV) radiation reaching underlying water column. UV‐dependent processes are likely to accelerate as a result shrinking extent and decreasing thickness caused climatic warming over this region. In study, we made first quantitative estimates photomineralization tDOM coastal ecosystem under current future regimes. We used an...
Abstract NK1.1 alloantigen expression can be used to define NK cells in certain mouse strains, such as B6 (NKR-P1C) and SJL (NKR-P1B). However, BALB/c do not react with the anti-NK1.1 mAb, PK136. To investigate NK1.1− phenotype of cells, we have undertaken epitope mapping genomic analysis Nkrp1 region. Bacterial artificial chromosome library reveals that, unlike Ly49 region, Nkrp1-Ocil/Clr region displays limited genetic divergence between mice. In fact, significant is confined Nkrp1b Nkrp1c...
The phylogeny of enterobacterial species commonly found in clinical samples was analysed by comparing partial sequences their elongation factor Tu gene ( tuf ) and F-ATPase β -subunit atpD ). An 884 bp fragment for an or 871 were sequenced 96 strains representing 78 from 31 genera. sequence analysis exhibited indel specific to Pantoea Tatumella species, showing, the first time, a tight phylogenetic affiliation between these two Comprehensive trees constructed are agreement with each other....
Abstract. Light absorption by colored dissolved organic matter (CDOM) (aCDOM(λ)) plays an important role in the heat budget of Arctic Ocean, contributing to recent decline sea ice, as well biogeochemical processes. We investigated aCDOM(λ) Southern Beaufort Sea where a significant amount CDOM is delivered Mackenzie River. In surface layer, aCDOM(440) showed strong and negative correlation with salinity, indicating river influence conservative transport plume. Below mixed weak but positive...