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dc.date.accessioned2010-03-09T20:22:56Z
dc.date.available2010-03-09T20:22:56Z
dc.date.issued2010-03-09T20:22:56Z
dc.identifier.urihttp://hdl.handle.net/10464/2936
dc.description.abstractAmbient (03) ozone concentrations were compared to ozone damage on milkweed plants to determine if there was a correlation. Eight survey sites of at least 100 plants each were located within 5 kilometers of Air Quality Index (AQI) stations in southern Ontario. Sites were visited nine times from June-September (2007) and milkweed leaves from 75 plants were assessed using methods pioneered in the United States. Ambient 0 3 results were calculated into SUM65, seasonal cumulative 0 3, and total 03. The 0 3 exposure indices SUM65 and cumulative 0 3 were tested statistically to determine which index is biologically relevant to milkweed as an 0 3 damage indicator species. The milkweed damage indices were incidence of leaves damaged per plant, incidence of plants damaged per site, and total 0 3• The incidence of plants injured per site was the best damage parameter with an F(1,28)=17.37, p=0.0003 for SUM65 and F(1,28)=7.5, p=O.0106 for cumulative 03 .. Milkweed plants showed quantifiable ozone damage with minimal spatial differences in damage and thus have potential use as a biomonitor species in southern Ontario.en_US
dc.language.isoengen_US
dc.publisherBrock Universityen_US
dc.subjectIndicators (Biology)en_US
dc.subjectMilkweeds--Ontario.en_US
dc.subjectEnvironmental monitoring--Ontario.en_US
dc.titleBioindication of ozone using milkweed plants in Southern Ontarioen_US
dc.typeElectronic Thesis or Dissertationen_US
dc.degree.nameM.Sc. Earth Sciencesen_US
dc.degree.levelMastersen_US
dc.contributor.departmentDepartment of Earth Sciencesen_US
dc.degree.disciplineFaculty of Mathematics and Scienceen_US
refterms.dateFOA2021-08-01T01:34:41Z


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