Areas of expertise
Environmental chemistry and toxicology , Aquatic ecosystems , Ecophysiology , Environmental risk evaluation , Metal biogeochemistry
- Associate Professor
Responsible mining is an important societal and environmental issue for Canada, which has vast mineral and water resources. Professor Crémazy and her team aim at understanding the processes that govern the interactions between metals and aquatic organisms. Of particular interest is the study of bioavailability of metals in natural waters. This research programme is divided into three main areas:
- Characterization of the geochemistry of metals in natural waters
- Characterization of the influence of environmental and biological variables on the bioavailability of metals
- Exploration of the biological fate of metals
This research work takes place in the laboratory and in the field, and covers a wide range of aquatic organisms (phytoplankton, gastropods, fish), environments (rivers, lakes, coastal areas), and regions (temperate, tropical and polar), and relies on techniques and concepts from analytical chemistry, biogeochemistry, biochemistry, toxicology, physiology, and ecology.
The techniques, data, and knowledge obtained are used to support better management of the environmental risk of metals in natural waters.
Gauthier PT, Blewett TA, Garman ER, Schlekat CE, Middleton ET, Suominen EM, Crémazy A. 2021. Environmental risk of nickel in aquatic Arctic ecosystems. Sci Tot Environ, 797, 148921.
Barst B, Hudelson K, Lescord G, Santa-Rios A, Basu N, Crémazy A, Drevnick P. 2020. Effects of non-native fish on food web structure and mercury biomagnification along a dissolved organic carbon gradient. Environ Toxicol Chem, 39, 2196–2207.
Crémazy A, Brix KV, Smith DS, Chen W, Grosell M, Schlekat CE, Garman ER, Middleton ET, Wood CM. 2020. A mystery tale: Nickel is fickle when snails fail. Investigating the variability in Ni toxicity to the great pond snail. Integr Environ Assess Manag, 16, 983–997
Liu F, Tan Q-G, Weiss D, Crémazy A, Fortin C, Campbell GC. 2020. Unravelling metal speciation in the microenvironment surrounding phytoplankton cells to improve prediction of metal bioavailability. Environ Sci Tech, 54, 8177–8185.
Johannsson O, Ferriera MS, Smith DS, Crémazy A, Wood CM, Val AL. 2020. Effects of natural light and depth on rates of photo-oxidation of dissolved organic carbon in a major black-water River, the Rio Negro, Brazil. Sci Tot Environ, 733, 139193.
Crémazy A, Wood CM, Smith DS, Val AL. 2019. The effects of natural suspended solids on copper toxicity to the cardinal tetra in Amazonian river waters. Environ Toxicol Chem, 38, 2708–2718.
Crémazy A, Brix KV and Wood CM. 2019. Using the Biotic Ligand Model framework to investigate binary metal interactions on the uptake of Ag, Cd, Cu, Ni, Pb and Zn in the freshwater snail Lymnaea stagnalis. Sci Tot Environ, 647, 1611-1625.
Crémazy A, Brix KV and Wood CM. 2018. Chronic toxicity of binary mixtures of six metals (Ag, Cd, Cu, Ni, Pb and Zn) to the great pond snail Lymnaea stagnalis. Environ Sci Technol 52, 5979-5988.
Brix KV, Tellis MS, Crémazy A and Wood CM. 2017. Characterization of the effects of binary metal mixtures on short-term uptake of Cd, Pb and Zn by rainbow trout (Oncorhynchus mykiss). Aquat Toxicol, 193, 217-227.
Crémazy A, Wood CM, Ng T-Y, Smith DS and Chowdhury MJ. 2017. Experimentally derived acute and chronic copper biotic ligand models for juvenile rainbow trout. Aquat Toxicol, 192C, 224-240.
Crémazy A, Wood CM, Smith DS, Ferreira MS, Johannsson OE, Giacomin M and Val AL. 2016. Investigating copper toxicity in the tropical fish cardinal tetra (Paracheirodon axelrodi) in natural Amazonian waters: measurements, modeling, and reality. Aquat Toxicol, 180, 353-363.
Brix KV, Tellis MS, Crémazy A and Wood CM. 2016. Characterization of the effects of binary metal mixtures on short-term uptake of Ag, Cu and Ni by rainbow trout (Oncorhynchus mykiss). Aquat Toxicol, 180, 236-246.
Crémazy A, Leclair S, Mueller KK, Vigneault B, Campbell PGC and Fortin C. 2015. Development of an in situ ion-exchange technique for the determination of free Cd, Co, Ni and Zn concentrations in freshwaters. Aquat Geochem, 21, 1-21.
Crémazy A, Campbell PGC and Fortin C. 2014. In the presence of fluoride, free Sc3+ is not a good predictor of Sc bioaccumulation by two unicellular algae: possible role of fluoro-complexes. Environ Sci Technol, 48, 9754-9761.
Crémazy A, Levy JL, Campbell PGC and Fortin C. 2013b. Uptake and subcellular partitioning of trivalent metals in a green alga: comparison between Al and Sc. Biometals, 26, 989-1001.
Crémazy A, Campbell PGC and Fortin C. 2013a. The biotic ligand model can successfully predict the uptake of a trivalent ion by a unicellular alga below pH 6.50 but not above: Possible role of hydroxo-species. Environ Sci Technol, 47, 2408-2415.
Simpson SL, Yverneau H, Crémazy A, Jarolimek CV, Price HL and Jolley DF. 2012. DGT-induced copper flux predicts bioaccumulation and toxicity to bivalves in sediments with varying properties. Environ Sci Technol, 46, 9038-9046.