Biota of canada - Open Access .click

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The effects of heavy metal contamination on the aquatic biota of Buttle lake and the Campbell river drainage (Canada)

Archives of Environmental Contamination and Toxicology, 1985
Concentrations of zinc and copper in a series of large oligotrophic lakes on Vancouver Island, Canada, have been increasing since mining operations began near the south end of Buttle lake in 1966. Declines in species diversity of both phytoplankton and periphyton have occurred since the beginning of mining activity with the disappearance of metal ...
M, Roch +7 more
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High levels of mercury in biota of a new Prairie irrigation reservoir with a simplified food web in Southern Alberta, Canada

Hydrobiologia, 2010
This study examined mercury levels in northern pike (Esox lucius) from the Twin Valley Reservoir in southern Alberta, 2 years after construction in 2003. The hypothesis was tested that mercury concentrations in pike from the reservoir are significantly higher than in pike from the nearby Oldman River.
Lars Brinkmann, Joseph B. Rasmussen
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Assessing the Potential Extent of Damage to Inland Lakes in Eastern Canada due to Acidic Deposition. III. Predicted Impacts on Species Richness in Seven Groups of Aquatic Biota

Canadian Journal of Fisheries and Aquatic Sciences, 1990
Linked regional chemical and biotic models predicted that at least 20% of all lakes in 15 of 38 secondary watersheds in eastern Canada had lost at least 20% of their potential species richness given 1980 acidic sulphate deposition levels; 20% of lakes in 15 watersheds represents circa 55 000 lakes.
C. K. Minns +3 more
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A Synonymized Checklist of the Vascular Flora of the United States, Canada and Greenland. Volume II, The Biota of North America.