Recherche
Voici les éléments 1-10 de 39
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 ...
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, ...
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 ...
Effects of experimental thermocline and oxycline deepening on methylmercury bioaccumulation in a Canadian Shield lake
(American Chemical Society, 2014-02-10)
Environmental disturbances like deforestation or climate change may influence lake thermal and oxic stratification, thereby modifying cycles of contaminants such as mercury (Hg). In a lake naturally separated into three ...
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 ...
Une addition à la flore du Québec : Monarda punctata var. villicaulis (Lamiaceae)
(Ottawa Field Naturalists Club, 1994)
Une population de Monarde ponctuée (Monarda punctata var. villicaulis) fut trouvée pour la première fois au Québec,
dans la région du Haut-Saint-Laurent. Cette population, qui comprend plus d’une centaine d’individus, ...
Edge effects on vegetation in rights-of-way
(Elsevier, 1997)
As a result of an increasing use of ecological methods for the control of vegetation in rights-of-way,
it has become necessary to understand the natural processes that are likely to facilitate or hinder
management ...
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 ...
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 ...
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 ...