Causes and Consequences of a Collapsing Food Web in Lake huron

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.

Name thesis:degree_name

M.Sc.

Level thesis:degree_level

Masters

Discipline thesis:degree_discipline

Great Lakes Institute for Environmental Research

Grantor

University of Windsor

Year dc:date.issued

2013

Author dc:creator

• Ryder, Mark

Advisor dc:contributor.advisor

• Haffner, Douglas

Licence

• http://creativecommons.org/licenses/by-nc-nd/4.0/

Language dc:language.iso

en_CA

Handle dc:identifier.uri

https://hdl.handle.net/20.500.14776/5001

OAI identifier oai:identifier

oai:uwindsor.scholaris.ca:20.500.14776/5001