{"id":{"repo_id":"windsor","oai_identifier":"oai:uwindsor.scholaris.ca:20.500.14776/5001"},"canonical_url":"https://search.dev.ndltd.org/etd/windsor/oai:uwindsor.scholaris.ca:20.500.14776/5001","repository":{"repo_id":"windsor","name":"University of Windsor","base_url":"https://uwindsor.scholaris.ca/server/oai/request"},"display":{"title":"Causes and Consequences of a Collapsing Food Web in Lake huron","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.","abstract_html":"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.","abstract_has_math":false,"creators":["Ryder, Mark"],"institution":"University of Windsor","degree_name":"M.Sc.","degree_level":"Masters","degree_discipline":"Great Lakes Institute for Environmental Research","degree_department":null,"school":null,"contributors":[],"advisors":["Haffner, Douglas"],"committee_chairs":[],"committee_members":[],"year":2013,"date_issued":"2013-01-01","date_published":"2013-01-01","updated_at":"2026-07-27T22:04:56Z","subjects":[],"languages":["en_CA"],"rights":[],"rights_urls":["http://creativecommons.org/licenses/by-nc-nd/4.0/"],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/20.500.14776/5001","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Haffner, Douglas"]},{"key":"dc:creator","label":"Author","values":["Ryder, Mark"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2025-06-23 16:05"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2014-01-22 10:03","2025-06-23T20:05:25Z"]},{"key":"dc:date.issued","label":"Date","values":["2013-01-01"]},{"key":"dc:type","label":"Dc Type","values":["info:eu-repo/semantics/masterThesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Great Lakes Institute for Environmental Research"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.Sc."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Windsor"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_CA"]},{"key":"dc:rights","label":"Dc Rights","values":["http://creativecommons.org/licenses/by-nc-nd/4.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/20.500.14776/5001"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["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."]},{"key":"dc:title","label":"Title","values":["Causes and Consequences of a Collapsing Food Web in Lake huron"]}]}],"canonical_facts":{"dc:contributor.advisor":["Haffner, Douglas"],"dc:creator":["Ryder, Mark"],"dc:date.accessioned":["2025-06-23 16:05"],"dc:date.available":["2014-01-22 10:03","2025-06-23T20:05:25Z"],"dc:date.issued":["2013-01-01"],"dc:description.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."],"dc:identifier.uri":["https://hdl.handle.net/20.500.14776/5001"],"dc:language.iso":["en_CA"],"dc:rights":["http://creativecommons.org/licenses/by-nc-nd/4.0/"],"dc:title":["Causes and Consequences of a Collapsing Food Web in Lake huron"],"dc:type":["info:eu-repo/semantics/masterThesis"],"thesis:degree_discipline":["Great Lakes Institute for Environmental Research"],"thesis:degree_level":["Masters"],"thesis:degree_name":["M.Sc."],"thesis:institution_name":["University of Windsor"]},"updated_at":"2026-07-27T22:04:56Z"}