Bioindication of ozone using milkweed plants in Southern Ontario
dc.date.accessioned | 2010-03-09T20:22:56Z | |
dc.date.available | 2010-03-09T20:22:56Z | |
dc.date.issued | 2010-03-09T20:22:56Z | |
dc.identifier.uri | http://hdl.handle.net/10464/2936 | |
dc.description.abstract | Ambient (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.iso | eng | en_US |
dc.publisher | Brock University | en_US |
dc.subject | Indicators (Biology) | en_US |
dc.subject | Milkweeds--Ontario. | en_US |
dc.subject | Environmental monitoring--Ontario. | en_US |
dc.title | Bioindication of ozone using milkweed plants in Southern Ontario | en_US |
dc.type | Electronic Thesis or Dissertation | en |
dc.degree.name | M.Sc. Earth Sciences | en_US |
dc.degree.level | Masters | en_US |
dc.contributor.department | Department of Earth Sciences | en_US |
dc.degree.discipline | Faculty of Mathematics and Science | en_US |
refterms.dateFOA | 2021-08-01T01:34:41Z |