Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Yves Couillard"'
Autor:
Yves Couillard
Cet ouvrage est écrit par un chef d'entreprise expérimenté pour les chefs d'entreprise et tous ceux qui ambitionnent de le devenir. Il traite des principales problématiques rencontrées par un dirigeant. Loin des théories, cet essai est le fruit
Publikováno v:
J. Environ. Monit.. 13:572-582
We studied the response of benthic diatoms to recent metal contamination in littoral cores collected at 25 sites in 11 lakes situated at different distances from a smelter in the Rouyn-Noranda mining region (Quebec). Diatom response was described in
Autor:
Olivier Perceval, Caroline Olsen, Yves Couillard, Peter G. C. Campbell, Stéphane Masson, Bernadette Pinel-Alloul
Publikováno v:
J. Environ. Monit.. 12:143-158
Specimens of the mayfly larva Hexagenia limbata and of the floater mussel Pyganodon grandis were sampled in rivers and lakes contaminated by trace metals in the Abitibi-James Bay region in northwestern Québec. Water samples were collected at each sa
Publikováno v:
Aquatic Geochemistry. 16:151-172
Combining in situ diffusion and column ion-exchange equilibration, we measured free metal ion concentrations (Cd, Cu and Zn) in water samples collected from the epilimnion of 14 lakes in the Rouyn-Noranda area (600 km north-west of Montreal, QC, Cana
Publikováno v:
Journal of Paleolimnology. 40:115-127
We examined changes at the community and population level of sedimentary diatoms over a wide temporal and spatial gradient of metal pollution encountered in cores from three lakes in the Abitibi mining region (Quebec, Canada). Diatom communities on t
Publikováno v:
Journal of Paleolimnology. 40:97-114
Sources and chronologies of metal contamination were studied in sediment cores of three lakes of the Rouyn-Noranda mining area (Quebec, Canada) affected by atmospheric deposition of anthropogenic contaminants. One of the three lakes also received aci
Publikováno v:
Environmental Pollution. 145:753-765
Hyalella were caged at three sites in each of the two rivers for 17 days. Food added to the cages consisted of plant and detrital material collected from the same, or other, sites. Concentrations of some metals in Hyalella (e.g., Cd and Cu), but not
Autor:
Olivier Perceval, Emmanuelle Bonneris, Yves Couillard, Bernadette Pinel-Alloul, Peter G. C. Campbell
Publikováno v:
Science of The Total Environment. 369:403-418
Temporal monitoring studies are needed to detect long-term trends in ecosystem health. In the present study, we tested metallothionein (MT) as a potential biomarker for long-term variations in trace metal levels in lakes subject to atmospheric metal
Publikováno v:
Journal of Paleolimnology. 32:163-175
We studied diatom taxonomic composition and the presence of morphological alterations (size and deformations) along a sediment core collected in Lac Dufault, Abitibi, whose watershed has a long history of mining pollution presently undergoing mitigat
Publikováno v:
Journal of Paleolimnology. 32:149-162
There is an important volume of published information on Lac Dufault (Quebec) which describes the history of metal inputs over 70 years and the changes that occurred in the lake as a result of this contamination. We used this abundant source of chron