Browsing Faculté des arts et des sciences – Département de sciences biologiques - Travaux et publications by Title
Now showing items 25-32 of 32
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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 ...