Date of Award
2013
Publication Type
Master Thesis
Degree Name
M.Sc.
Department
Great Lakes Institute for Environmental Research
Keywords
Biological sciences, Health and environmental sciences, Bioaccumulation, Lake trout, Polychlorinated biphenyls, Trophic efficiency
Supervisor
Haffner, Douglas
Rights
info:eu-repo/semantics/openAccess
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Abstract
Lake Huron has undergone significant declines in abundance at multiple trophic levels. These declines are demonstrated to be the result of a decrease in the overall primary production, from an estimate of 100 g C m -2 yr-1 in the 1970s. to 32 g C m-2 yr -1 in this study. It is hypothesized that these declines are the result of increased photo-inhibition and nutrient bioavailability. These declines have the potential to not only affect energy transfer, but contaminant transfer as well. Bioaccumulation patterns in lake trout differed significantly across the three basins, with Georgian Bay revealing the most significant increase in bioaccumulation potential. These differences are demonstrated to be the result of differences in trophic efficiencies in lake trout. This research confirms that the collapse of the Lake Huron food web is related to both a decrease in primary production, as well as declines in trophic efficiency.
Recommended Citation
Ryder, Mark, "Causes and Consequences of a Collapsing Food Web in Lake huron" (2013). Electronic Theses and Dissertations. 4996.
https://scholar.uwindsor.ca/etd/4996