Browsing Faculté des arts et des sciences – Département de sciences biologiques - Travaux et publications by Title
Now showing items 9-32 of 32
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Fate and trophic transfer of rare earth elements in temperate lake food webs
(2017-05-05)Many mining projects targeting rare earth elements (REE) are in development in North America, but the background concentrations and trophic transfer of these elements in natural environments have not been well characterized. We sampled abiotic and food ... -
The fish or the egg : maternal transfer and subcellular partitioning of mercury and selenium in Yellow Perch (Perca flavescens)
(Elsevier, 2019-04-17)Mercury (Hg) is a trace element of particular concern since it is ubiquitous in the environment and because its methylated form (MeHg) readily bioaccumulates and biomagnifies in food webs. This latter process leads to elevated Hg concentrations in fish ... -
Forked Three-awned Grass, Aristida basiramea Engelm. ex Vasey : a new addition to the flora of Quebec
(Ottawa Field Naturalists Club, 2004)A population of Forked Three-awned Grass (Aristida basiramea Engelm. ex Vasey; Poaceae) was found for the first time in Quebec, on a sand barren of the Cazaville region (Haut-Saint-Laurent). The only other region where this species is known in Canada ... -
Freshwater sample preservation for the analysis of dissolved low molecular mass thiols
(Wiley, 2017)Low molecular mass (LMM) thiols are ubiquitous organosulfur peptides that play key roles in biogeochemical element cycling. These LMM thiols, found at low concentrations in the water column, are highly sensitive to oxidation and degradation processes ... -
The Haut-Saint-Laurent wilderness at the time of settlement based on Sellar’s History. Part I : Wildlife
(Société Historique de la Vallée de la Châteauguay = Chateauguay Valley Historical Society, 2004) -
The Haut-Saint-Laurent wilderness at the time of settlement based on Sellar’s History. Part II : Forests and wetlands.
(Société Historique de la Vallée de la Châteauguay = Chateauguay Valley Historical Society, 2006) -
High methylmercury in Arctic and subarctic ponds is related to nutrient levels in the warming eastern Canadian Arctic
(2015-06)Permafrost thaw ponds are ubiquitous in the eastern Canadian Arctic, yet little information exists on their potential as sources of methylmercury (MeHg) to freshwaters. They are microbially active and conducive to methylation of inorganic mercury, ... -
The history and tree stratum of an old-growth forest of Haut-Saint-Laurent region, Quebec
(Natural Areas Association, 1992)An old-growth forest of presettlement origin was recently discovered at the northern limit of the Eastern Deciduous Forest (sensu Braun 1950) of North America, in an area that is extensively affected by logging, land clearing, and agriculture. In a ... -
Increasing phytoremediation efficiency and reliability using novel omics approaches
(Cell Press, 2014-04-12)Phytoremediation is a cost-effective green alternative to traditional soil remediation technologies, but has experienced varied success in practice. The recent omics revolution has led to leaps in our understanding of soil microbial communities and ... -
The level of pollination specialization affects the relationship between the shape of flowers and the bills of their hummingbird pollinators in Antillean Gesneriaceae
(The University of Chicago Press, 2022-01-27)Premise of research. Pollinators are known to impose strong selection on floral shape. Particularly well studied is the relationship between the flowers of hummingbird-pollinated plant species and the bills of their pollinators. However, no studies to ... -
Local fungi, willow and municipal compost effectively remediate petroleum-contaminated soil in the Canadian North
(Elsevier, 2018-12-15)Low energy-input alternatives based on locally available products are needed for treating petroleum-hydrocarbon spills in northern regions. We tested the efficacy of three local biological components (municipal compost, white-rot fungus: Pleurotus ... -
Mapping metal (Hg, As, Se), lipid and protein levels within fish muscular system in two fish species (Striped Bass and Northern Pike)
(Elsevier, 2020-11-19)Current guidelines tend to limitfish consumption based on mercury (Hg) or monomethylmercury(MeHg) content infishflesh, without considering the presence of antagonist chemical elements thatcould modulate Hg toxicity. However, it is difficult to assess ... -
Mercury and selenium distribution in key tissues and early life stages of Yellow Perch (Perca flavescens)
(Elsevier, 2019-07-26)Whereas early life stages are usually considered as particularly sensitive to both organic and inorganic contaminants, field studies assessing contaminant bioaccumulation in these stages are scarce. Selenium (Se) is thought to counteract Hg toxic effects ... -
Mercury, hydroquinone and clobetasol propionate in skin lightening products in West Africa and Canada
(2016-10-31)Skin lightening products are types of cosmetics (creams, gels, lotions and soaps) applied voluntarily on skin. Several of these products contain a variety of active ingredients that are highly toxic. Among those toxic agents, the present study focuses ... -
Mobilization and transformation of mercury across a dammed boreal river are linked to carbon processing and hydrology
(Wiley, 2020-09-22)Reservoirs are known to accelerate the mobilization and cycling of mercury and carbon as aresult of flooding of terrestrial organic matter, which can lead to environmental concerns at local andbroader spatial scales. We explored the covariation of ... -
Neuron participation in a synchrony-encoding assembly
(2006)BACKGROUND:Synchronization of action potentials between neurons is considered to be an encoding process that allows the grouping of various and multiple features of an image leading to a coherent perception. How this coding neuronal assembly is configured ... -
Photodemethylation of methylmercury in Eastern Canadian Arctic thaw pond and lake ecosystems
(2016-04-05)Permafrost thaw ponds of the warming Eastern Canadian Arctic are major landscape constituents and often display high levels of methylmercury (MeHg). We examined photodegradation potentials in high-dissolved organic matter (DOC) thaw ponds on Bylot ... -
Relationship between extracellular low-molecular-weight thiols and mercury species in natural lake periphytic biofilms
(American chemical Society, 2015-05-26)The uptake of mercury by microorganisms is a key step in the production of methylmercury, a biomagnifiable toxin. Mercury complexation by low molecular weight (LMW) thiols can affect its bioavailability and thus the production of methylmercury. Freshwater ... -
Role of organic matter and microbial communities in mercury retention and methylation in sediments near run-of-river hydroelectric dams
(Elsevier, 2021-02-06)Run-of-river power plants (RoRs) are expected to triple in number over the next decades in Canada. These struc-tures are not anticipated to considerably promote the mobilization and transport of mercury (Hg) and its subse-quent microbial transformation ... -
Role of prey subcellular distribution on the bioaccumulation of yttrium (Y) in the rainbow trout
(Elsevier, 2019-12-13)Our knowledge of the processes leading to the bioaccumulation of rare earth elements (REE) in aquatic biota is limited. As the contamination of freshwater ecosystems by anthropogenic REE have recently been reported, it becomes increasingly urgent to ... -
Selecting herbaceous plant cover to control tree invasion in rights-of-way
(Elsevier, 2002)Following construction of a right-of-way, environmental regulation often requires the rapid restoration of a herbaceous plant cover to control erosion and/or attenuate visual impact. Herbaceous species can be selected with the added long-term goal ... -
Spatially explicit predictions of food web structure from regional-level data
(The Royal Society, 2024-07-22)Knowledge about how ecological networks vary across global scales iscurrently limited given the complexity of acquiring repeated spatial datafor species interactions. Yet, recent developments in metawebs highlightefficient ways to first document possible ... -
Toxicity and subcellular fractionation of yttrium in three freshwater organisms : Daphnia magna, Chironomus riparius and Oncorhynchus mykiss
(American Chemical Society, 2019-08-15)The demand for rare earth elements (REEs) has increased since the 1990s leading to the development of many mining projects worldwide. However, less is known about how organisms can handle these metals in natural aquatic systems. Through laboratory ... -
Understanding food web mercury accumulation through trophic transfer and carbon processing along a river affected by recent run-of-river dams
(2021-02-03)Unlike large dams which favor methylation of Hg in flooded soils over long periods, run-of-river dams are designed to flood a limited area of soils and are therefore not expected to significantly affect mercury (Hg) cycling or carbon processing. We ...
