{"id":{"repo_id":"royalroads","oai_identifier":"oai:null:10170/553"},"canonical_url":"https://search.dev.ndltd.org/etd/royalroads/oai:null:10170/553","repository":{"repo_id":"royalroads","name":"Royal Roads University","base_url":"https://www.viurrspace.ca/server/oai/request"},"display":{"title":"Cumulative effects thresholds for arctic grayling in the Wapiti River watershed","abstract":"Intensity and types of land use have changed rapidly in the last century and in north-western Alberta this has coincided with the decline of Wapiti River watershed Arctic Grayling (<italic>Thymallus arcticus</italic>) populations. Data on diurnal dissolved oxygen (DO), chemical and physical stream habitat data were collected in nine sub-watersheds of the Wapiti River with historically abundant Arctic Grayling populations. Levels and fluctuations of DO and temperature were related to the status of populations; five of the nine streams had higher temperatures and lower DO during summer, anoxic conditions during winter and extirpated populations. Amount of disturbed land and road density within sub-watersheds were inversely related to DO levels and population status. Cumulative effects modelling suggests a possible mechanism for these relationships is increased phosphorous runoff, leading to impaired habitat. These relationships and thresholds may be used as a management tool to maintain or restore Arctic Grayling and other stream fishes.","abstract_html":"Intensity and types of land use have changed rapidly in the last century and in north-western Alberta this has coincided with the decline of Wapiti River watershed Arctic Grayling (&lt;italic&gt;Thymallus arcticus&lt;/italic&gt;) populations. Data on diurnal dissolved oxygen (DO), chemical and physical stream habitat data were collected in nine sub-watersheds of the Wapiti River with historically abundant Arctic Grayling populations. Levels and fluctuations of DO and temperature were related to the status of populations; five of the nine streams had higher temperatures and lower DO during summer, anoxic conditions during winter and extirpated populations. Amount of disturbed land and road density within sub-watersheds were inversely related to DO levels and population status. Cumulative effects modelling suggests a possible mechanism for these relationships is increased phosphorous runoff, leading to impaired habitat. These relationships and thresholds may be used as a management tool to maintain or restore Arctic Grayling and other stream fishes.","abstract_has_math":false,"creators":["Norris, Adam Paul"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Sullivan, Michael","Moran, Johnathan"],"committee_chairs":[],"committee_members":[],"year":2013,"date_issued":"2013-01-22","date_published":"2013-01-22","updated_at":"2026-08-21T22:21:56Z","subjects":["Arctic Grayling","Dissolved oxygen diurnal cycles","Land use","Water-quality based habitat","Fisheries management"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10170/553","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"source_record":{"url":"https://www.viurrspace.ca/server/oai/request?verb=GetRecord&metadataPrefix=dim&identifier=oai%3Anull%3A10170%2F553","prefix":"dim"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Sullivan, Michael","Moran, Johnathan"]},{"key":"dc:creator","label":"Author","values":["Norris, Adam Paul"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2013-01-22T21:28:53Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2013-01-22T21:28:53Z"]},{"key":"dc:date.issued","label":"Date","values":["2013-01-22"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Arctic Grayling","Dissolved oxygen diurnal cycles","Land use","Water-quality based habitat","Fisheries management"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10170/553"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Intensity and types of land use have changed rapidly in the last century and in north-western Alberta this has coincided with the decline of Wapiti River watershed Arctic Grayling (<italic>Thymallus arcticus</italic>) populations. Data on diurnal dissolved oxygen (DO), chemical and physical stream habitat data were collected in nine sub-watersheds of the Wapiti River with historically abundant Arctic Grayling populations. Levels and fluctuations of DO and temperature were related to the status of populations; five of the nine streams had higher temperatures and lower DO during summer, anoxic conditions during winter and extirpated populations. Amount of disturbed land and road density within sub-watersheds were inversely related to DO levels and population status. Cumulative effects modelling suggests a possible mechanism for these relationships is increased phosphorous runoff, leading to impaired habitat. These relationships and thresholds may be used as a management tool to maintain or restore Arctic Grayling and other stream fishes."]},{"key":"dc:title","label":"Title","values":["Cumulative effects thresholds for arctic grayling in the Wapiti River watershed"]}]}],"canonical_facts":{"dc:contributor.advisor":["Sullivan, Michael","Moran, Johnathan"],"dc:creator":["Norris, Adam Paul"],"dc:date.accessioned":["2013-01-22T21:28:53Z"],"dc:date.available":["2013-01-22T21:28:53Z"],"dc:date.issued":["2013-01-22"],"dc:description.abstract":["Intensity and types of land use have changed rapidly in the last century and in north-western Alberta this has coincided with the decline of Wapiti River watershed Arctic Grayling (<italic>Thymallus arcticus</italic>) populations. Data on diurnal dissolved oxygen (DO), chemical and physical stream habitat data were collected in nine sub-watersheds of the Wapiti River with historically abundant Arctic Grayling populations. Levels and fluctuations of DO and temperature were related to the status of populations; five of the nine streams had higher temperatures and lower DO during summer, anoxic conditions during winter and extirpated populations. Amount of disturbed land and road density within sub-watersheds were inversely related to DO levels and population status. Cumulative effects modelling suggests a possible mechanism for these relationships is increased phosphorous runoff, leading to impaired habitat. These relationships and thresholds may be used as a management tool to maintain or restore Arctic Grayling and other stream fishes."],"dc:identifier.uri":["http://hdl.handle.net/10170/553"],"dc:subject":["Arctic Grayling","Dissolved oxygen diurnal cycles","Land use","Water-quality based habitat","Fisheries management"],"dc:title":["Cumulative effects thresholds for arctic grayling in the Wapiti River watershed"]},"updated_at":"2026-08-21T22:21:56Z"}