Michel Gosselin

Michel Gosselin
Université du Québec à Rimouski UQAR | uqar · Institut des Sciences de la Mer de Rimouski (ISMER)

PhD

About

265
Publications
60,795
Reads
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11,943
Citations
Citations since 2017
64 Research Items
4817 Citations
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20172018201920202021202220230200400600800
20172018201920202021202220230200400600800
20172018201920202021202220230200400600800
Additional affiliations
September 2011 - November 2017
Université du Québec à Rimouski UQAR
Position
  • Professor
September 1999 - present
Université du Québec à Rimouski UQAR
Position
  • Professor
September 1991 - September 1999
Université du Québec à Rimouski (UQAR)
Position
  • Professor
Education
January 1985 - April 1990
Laval University
Field of study
  • Ice algal ecology

Publications

Publications (265)
Article
Full-text available
The rapid physical changes affecting the Arctic Ocean alter the growth conditions of primary producers. In this context, a crucial question is whether these changes will affect the composition of phytoplankton communities, augment their productivity, and eventually enhance food webs. We combined satellite and model products with in situ datasets co...
Article
Full-text available
Protist (> 2 μm) taxonomic composition was investigated for the first time in 4 Labrador fjords (Nachvak, Saglek, Okak and Anaktalak) during summers 2007 and 2013, early fall 2010 and late fall 2009. Protist composition was significantly different from one season to another. Significant spatial differences in protist composition were found only dur...
Article
Full-text available
In an experimental assessment of the potential impact of Arctic Ocean acidification on seasonal phytoplankton blooms and associated dimethyl sulfide (DMS) dynamics, we incubated water from Baffin Bay under conditions representing an acidified Arctic Ocean. Using two light regimes simulating under-ice or subsurface chlorophyll maxima (low light; low...
Article
The contiguous Arctic shelf is the green belt of the Arctic Ocean. Phytoplankton dynamics in this environment are driven by extreme physical gradients and by rapid climate change, which influence light and nutrient availability as well as the growth and ecological characteristics of phytoplankton. A large dataset collected across the Canadian Beauf...
Article
Full-text available
The balance of photosynthesis and respiration by organisms like algae and bacteria determines whether sea ice is net heterotrophic or autotrophic. In turn this clarifies the influence of microbes on atmosphere-ice-ocean gas fluxes, and their contribution to the trophic system. In this study we define two phases of the spring bloom based on bottom-i...
Presentation
Full-text available
Biogenic sources of sulfur are important precursors of aerosols in the Arctic during the summer months. Recent studies show that peaks in ultrafine particle formation events often coincide with hotspots of dimethyl sulfide (DMS) emissions from the marginal ice zone. During the last 10 years, we explored the diversity of DMS sources associated with...
Article
The expected increase of shipping activities in the Canadian Arctic is predicted to enhance potential introductions of non-indigenous species (NIS), including dinoflagellate taxa, which may have important ecological and economic impacts once released in a new environment. The lack of information about native species represents an obstacle in detect...
Presentation
Climate change may enhance the occurrence of harmful algal events (HAEs) in the Arctic Ocean (AO). While a certain number of HAEs have already been recorded in the AO, we lack a comprehensive knowledge of the spatial and temporal trends of these events over the last 150 years. To do so, we build a comprehensive database that compiles as many data a...
Article
Full-text available
The Great Whale River in subarctic Quebec, Canada, is one of the main freshwater inflows to Hudson Bay. This region is experiencing rapid climate change, with pronounced impacts on the cryosphere, and ongoing socio-economic development that may accelerate with future road and shipping links. This review integrates information available to date on t...
Article
Full-text available
In several parts of the world, mytilid mussels, Mytilus spp., are infected with pathogenic, single-celled, photosynthetic algae belonging to the genus Coccomyxa. The posterior shell edge of heavily infected mussels becomes considerably thickened with an extra shell material. Also, the external shell surface is usually eroded as a result of the micr...
Article
As evidenced from literature, exposure to non-lethal concentrations of dissolved copper (Cu²⁺) and copper nanoparticles (CuO NPs) promotes blue mussels susceptibility to various bacterial infections. We study whether pre-exposure (3.5 h) with CuSO4 (100 μg Cu L⁻¹) and CuO NPs (1000 μg Cu L⁻¹) will result in infection of M. edulis L. with pathogenic...
Article
Full-text available
The MALINA oceanographic campaign was conducted during summer 2009 to investigate the carbon stocks and the processes controlling the carbon fluxes in the Mackenzie River estuary and the Beaufort Sea. During the campaign, an extensive suite of physical, chemical and biological variables were measured across seven shelf–basin transects (south–north)...
Article
A multi-institutional initiative was created in a context of potential oil exploration at the Old Harry site to monitor the marine ecosystem and manage resources of the Gulf of St. Lawrence (GSL). As part of this initiative, two sediment traps were deployed at depths of 34 m and 100 m at a site northwest of Cabot Strait in the Laurentian Channel to...
Article
Full-text available
The Arctic is undergoing numerous environmental transformations. As a result of rising temperatures and additional freshwater inputs, ice cover is changing, with profound impacts on organisms at the base of food webs and consequently on the entire Arctic ecosystem. Indeed, phytoplankton not only provide energy as lipids, but also essential fatty ac...
Article
Full-text available
The MALINA oceanographic campaign was conducted during summer 2009 to investigate the carbon stocks and the processes controlling the carbon Fluxes in the Mackenzie River estuary and the Beaufort Sea. During the campaign, an extensive suite of physical, chemical and biological variables was measured across seven shelf–basin transects (south-north)...
Article
Climate changes in the Arctic may weaken the currently tight pelagic-benthic coupling. In response to decreasing sea ice cover, arctic marine systems are expected to shift from a ‘sea-ice algae–benthos' to a ‘phytoplankton-zooplankton’ dominance. We used mollusc shells as bioarchives and fatty acid trophic markers to estimate the effects of the red...
Article
Full-text available
The decline of sea-ice thickness, area, and volume due to the transition from multi-year to first-year sea ice has improved the under-ice light environment for pelagic Arctic ecosystems. One unexpected and direct consequence of this transition, the proliferation of under-ice phytoplankton blooms (UIBs), challenges the paradigm that waters beneath t...
Article
In August 2019, visual inspection of intertidal zones of the Gulf of Maine (ME, USA) revealed young and adult wild blue mussels, Mytilus spp., in Alley Bay (Jonesport area) with the distinctive L‐shaped shell deformity (LSSD) and green spots (GS) in the mantle and adductor muscle. LSSD is a characteristic sign of current or previous mussel infectio...
Article
This study was conducted in 4 Labrador fjords (Nachvak, Saglek, Okak, and Anaktalak) during the summers of 2007 and 2013, early fall 2010, and late fall 2009. Our results show that water temperature combined with the availability of nutrients and organic substrates are the main abiotic factors controlling the abundance of heterotrophic bacteria in...
Article
Full-text available
Arctic sea ice is retreating and thinning and its rate of decline has steepened in the last decades. While phytoplankton blooms are known to seasonally propagate along the ice edge as it recedes from spring to summer, the substitution of thick multiyear ice (MYI) with thinner, ponded first-year ice (FYI) represents an unequal exchange when consider...
Article
An L-shaped shell deformity (LSSD) on the posterior shell edge is known exclusively in wild mytilid mussels infected with photosynthetic Coccomyxa-like algae. LSSD forms due to the appearance of extra shell material; it is only possible if the mussel is heavily infected with the alga. Traditionally, observation of high amount of the green spots (al...
Chapter
Full-text available
At the base of the marine and coastal food webs throughout the Greater Hudson Bay Marine Region are the photosynthetic organisms including phytoplankton (microscopic free-drifting algae), ice algae, macro-algae such as kelp, and coastal seagrasses (eelgrass). The production of organic matter by these various photosynthetic organisms – also called ‘...
Preprint
Full-text available
Arctic sea ice is retreating, thinning and its rate of decline has steepened in the last decades. While phytoplankton blooms are known to seasonally propagate along the ice edge as it recedes from spring to summer, the substitution of thick multi-year ice (MYI) with thinner, ponded first-year ice (FYI) represents an unequal exchange when considerin...
Article
Full-text available
This paper presents the first empirical estimates of dimethyl sulfide (DMS) gas fluxes across permeable sea ice in the Arctic. DMS is known to act as a major potential source of aerosols that strongly influence the Earth’s radiative balance in remote marine regions during the ice-free season. Results from a sampling campaign, undertaken in 2015 bet...
Article
Full-text available
Despite growing evidence that the ocean is an important source of ice-nucleating particles (INPs) in the atmosphere, our understanding of the properties and concentrations of INPs in ocean surface waters remains limited. We have investigated INPs in sea surface microlayer and bulk seawater samples collected in the Canadian Arctic during the summer...
Article
Full-text available
Chromophoric dissolved organic matter (CDOM) is highly enriched in bottom sea ice in the Arctic during ice algal blooms, giving rise to multifaceted ecological implications in both the sea ice and the underlying seawater. We conducted laboratory culture incubations to assess the potential role of ice algae in the accumulation of CDOM in Arctic sea...
Article
Full-text available
The effects of ocean acidification and warming on the concentrations of dimethylsulfoniopropionate (DMSP) and dimethylsulfide (DMS) were investigated during a mesocosm experiment in the Lower St. Lawrence Estuary (LSLE) in the fall of 2014. Twelve mesocosms covering a range of pHT (pH on the total hydrogen ion concentration scale) from 8.0 to 7.2,...
Article
Full-text available
Motivated by the need to predict how the Arctic atmosphere will change in a warming world, this article summarizes recent advances made by the research consortium NETCARE (Network on Climate and Aerosols: Addressing Key Uncertainties in Remote Canadian Environments) that contribute to our fundamental understanding of Arctic aerosol particles as the...
Chapter
Full-text available
Arctic marine ecosystems provide numerous benefits and services of economic, societal and ecological value, including the provision of food resources, the conservation of biodiversity, carbon storage and nutrient recycling, among others. The Arc3Bio project combines the multidisciplinary skills of several experts to evaluate how climate variability...
Chapter
Full-text available
Arctic marine ecosystems provide numerous benefits and services of economic, societal and ecological value, including the provision of food resources, the conservation of biodiversity, carbon storage and nutrient recycling, among others. The Arc3Bio project combines the multidisciplinary skills of several experts to evaluate how climate variability...
Chapter
Full-text available
The marine ecosystem of the Eastern Canadian Arctic is shaped by a combination of remote and regional processes that affect freshwater loading, nutrient supply and ratios, acidification, and ice dynamics. Remote drivers include the inflow of waters from the Pacific Ocean and rivers, as well as their transformations in transit toward eastern Baffin...
Chapter
Full-text available
Living, harvestable resources in the upper Arctic Ocean ultimately depend on the production of marine microalgae. Microalgal production also mitigates global warming by fixing the greenhouse gas CO2 into biomass, of which a portion sinks to the seafloor. This process, called the ‘biological CO2 pump’, supplies food to the benthic organisms living a...
Chapter
Full-text available
Nunatsiavut Nuluak is addressing Inuit concerns about the impacts of climate change and modernization on the health of coastal ecosystems and communities of northern Labrador. The overarching goal is to provide meaningful and timely research on regionally identified priorities while involving Inuit and Inuit Knowledge in all aspects of the project....
Preprint
Full-text available
Despite growing evidence that the ocean is an important source of ice nucleating particles (INPs) in the atmosphere, our understanding of the properties and concentrations of INPs in ocean surface waters remain limited. We have investigated the properties and concentrations of INPs in sea surface microlayer and bulk seawater samples collected in th...
Article
Full-text available
We investigated the combined effect of ocean acidification and warming on the dynamics of the phytoplankton fall bloom in the Lower St. Lawrence Estuary (LSLE), Canada. Twelve 2600L mesocosms were set to initially cover a wide range of pHT (pH on the total proton scale) from 8.0 to 7.2 corresponding to a range of pCO2 from 440 to 2900µatm, and two...
Article
Full-text available
Oceanic gateways are sensitive to climate driven processes. By connecting oceans, they have a global influence on marine biological production and biogeochemical cycles. The furthest north of these gateways is Nares Strait at the top of the North Water between Greenland and Ellesmere Island (Canada). This gateway is globally beneficial, first by su...
Article
Full-text available
Melt pond formation is a seasonal pan-Arctic process. During the thawing season, melt ponds may cover up to 90 % of the Arctic first-year sea ice (FYI) and 15 to 25 % of the multi-year sea ice (MYI). These pools of water lying at the surface of the sea ice cover are habitats for microorganisms and represent a potential source of the biogenic gas di...
Article
The partial pressure of CO2 in surface water (pCO2sw) measured within the Canadian Arctic Archipelago (CAA) and Baffin Bay was highly variable with values ranging from strongly undersaturated (118 μatm) to slightly supersaturated (419 μatm) with respect to the atmospheric levels (~386 μatm) during summer and autumn 2011. During summer, melting sea...
Data
Brackish waters; Entire community; Growth/Morphology; Laboratory experiment; Mesocosm or benthocosm; North Atlantic; Other metabolic rates; Pelagos; Primary production/Photosynthesis; Temperate; Temperature
Article
Full-text available
From the beginning of spring to the melt period, ice algae in the bottom of Arctic sea ice experience a large irradiance range, varying from <0.1% up to 25–30% of the incoming visible radiation. The increase in spring is usually rapid, with a varying photoacclimative response by bottom ice algae to protect themselves against excess light, such as c...
Article
Full-text available
From the beginning of spring to the melt period, ice algae in the bottom of Arctic sea ice experience a large irradiance range, varying from <0.1% up to 25–30% of the incoming visible radiation. The increase in spring is usually rapid, with a varying photoacclimative response by bottom ice algae to protect themselves against excess light, such as c...
Poster
Full-text available
Rapid changes in ice cover, freshwater input and sea temperature in the Canadian High Arctic are affecting phytoplankton communities (Blais et al. 2017). On the one hand, the higher exposure of sea surface to wind forcing could deepen the surface mixed layer, rendering it more difficult for phytoplankton to harvest light, but easier for them to acc...
Article
Full-text available
Based on a two-year dataset, the eastern Canadian Arctic Archipelago and Baffin Bay appear to be a modest summertime sink of atmospheric CO2. We measured surface water CO2 partial pressure (pCO2), salinity, and temperature throughout northern Baffin Bay, Nares Strait, and Lancaster Sound from the CCGS Amundsen during its 2013 and 2014 summer cruise...
Article
Full-text available
Melt pond formation is a natural seasonal pan-Arctic process. During the thawing season, melt ponds may cover up to 90 % of the Arctic first year sea ice (FYI) and 15 to 25 % of the multi-year sea ice (MYI). These pools of water lying at the surface of the sea-ice cover are habitats for microorganisms and represent a potential source of the biogeni...
Poster
Full-text available
La diminution du couvert de glace dans l’Arctique canadien a une influence importante sur les caractéristiques physico-chimiques de la colonne d’eau (Carmack et McLaughlin 2011). La région des Eaux du Nord (NOW) ainsi que celle du détroit de Nares étant désormais dépourvues de glace en été, il devient intéressant d’essayer de comprendre comment ces...
Poster
Full-text available
NetCare has successfully brought together scientists from various fields to uncover the uncertainties surrounding the Arctic’s ocean-atmosphere boundary. Given that climate change has already had a significant influence on the Arctic, a key uncertainty remains: how will phytoplankton communities respond to environmental variations caused by climate...
Article
Full-text available
The source strength and capability of aerosol particles in the Arctic to act as cloud condensation nuclei have important implications for understanding the indirect aerosol–cloud effect within the polar climate system. It has been shown in several Arctic regions that ultrafine particle (UFP) formation and growth is a key contributor to aerosol numb...
Article
Full-text available
The sea-surface microlayer and bulk seawater can contain ice-nucleating particles (INPs) and these INPs can be emitted into the atmosphere. Our current understanding of the properties, concentrations, and spatial and temporal distributions of INPs in the microlayer and bulk seawater is limited. In this study we investigate the concentrations and pr...
Article
Full-text available
A coupled 1-D sea ice-ocean physical-biogeochemical model was developed to investigate the processes governing ice algal and phytoplankton blooms in the seasonally ice-covered Arctic Ocean. The 1-D column is representative of one grid cell in 3-D model applications and provides a tool for parameterization development. The model was applied to Resol...
Article
Significance A biogeochemical connection between the atmosphere and the ocean is demonstrated whereby a marine source of oxygenated volatile organic compounds is identified. Compounds of this type are involved in the formation of secondary organic aerosol, which remains one of the most poorly understood components of Earth’s climate system due in p...
Article
We determined, and compared, the abiotic stress state of algae and their attached bacterial communities following their release into the water column during the Arctic sea ice melt season using specific lipid markers that are characteristic of type II photo-oxidation processes, together with those associated with cis-trans isomerase and 10S-DOX-lik...
Article
Full-text available
The sea-surface microlayer and bulk seawater can contain ice-nucleating particles (INPs) and these INPs can be emitted into the atmosphere. Our current understanding of the properties, concentrations, spatial and temporal distributions of INPs in the microlayer and bulk seawater is limited. In this study we investigate the concentrations and proper...
Poster
Full-text available
Climate change is affecting the Arctic Ocean at an unprecedented rate. Freshening of the sea surface layer by runoff and ice melt is known to affect vertical stratification strength and could trigger a shift towards an oligotrophic ocean. Such changes might affect primary producers and their ability to export carbon to the deep ocean. We studied th...
Data
Arctic; Arctic; Bottles or small containers/Aquaria (<20 L); Community composition and diversity; Entire community; Laboratory experiment; Light; Open ocean; Other metabolic rates; Pelagos; Polar