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Permanent link (DOI): https://doi.org/10.7939/R3S424

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Selenium dynamics in Canadian Rocky Mountain lakes Open Access

Descriptions

Other title
Subject/Keyword
fishes
selenium
mountain
food web
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Fortin, Barbra Linda
Supervisor and department
Schindler, David W. (Biological Sciences)
Examining committee member and department
Vinebrooke, Rolf D. (Biological Sciences)
Wolfe, Alexander P. (Earth and Atmospheric Sciences)
Department
Department of Biological Sciences
Specialization

Date accepted
2010-01-28T16:49:11Z
Graduation date
2010-06
Degree
Master of Science
Degree level
Master's
Abstract
I investigated, water, invertebrates and fishes from lakes in Banff National Park and Kananaskis Country, Alberta for selenium (Se), an element known to be toxic to vertebrates. At some depths, Se concentrations in sediment exceeded recognized thresholds for bird and fish reproductive impairment. Se concentrations in water were over USEPA guidelines after spring melt runoff. In aquatic invertebrates, Se concentrations exceeded values known to cause reproductive impairment in fish and bird predators. Se concentrations in all fish species exceeded known thresholds for reproductive impairment in avian consumers and the majority surpassed concentrations that would negatively affect wildlife and human consumers. Se concentrations in some fish species have significantly increased over the past 6-16 years. The strongest predictors of fish Se concentrations were growth rate, condition factor, age, weight, trophic position (within lakes) and vegetation type (among lakes). These results suggest that consumption advisories are desirable for several lakes in the Banff and Kananaskis area, and that Se concentrations in fish from other area lakes should be investigated.
Language
English
DOI
doi:10.7939/R3S424
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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