2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/21/2019 | 12:15 PM - 12:30 PM | INVESTIGATIONS OF AQUATIC COMMUNITY RESPONSE TO VARIATION IN LAND-USE TYPE AND INTENSITY ACROSS URBANIZATION GRADIENTS | 251 AB
INVESTIGATIONS OF AQUATIC COMMUNITY RESPONSE TO VARIATION IN LAND-USE TYPE AND INTENSITY ACROSS URBANIZATION GRADIENTS
With increasing urbanization of watersheds in the lower Laurentian Great Lakes basin, there is an increased need to improve our understanding of urban impacts to aquatic ecosystem diversity and function. In Durham Region, Ontario, watersheds drain from headwaters in the relatively pristine Oak-Ridges Moraine to the north-central shores of Lake Ontario. Watersheds in the region typically experience an agriculture-urban gradient from north-south, and an urban-agriculture gradient from west to east. Stormwater is primarily managed by stormwater management ponds or direct sewer drainage in older areas. We conducted studies on urban wetlands, stormwater management ponds, and tributaries to assess the impacts of urbanization on ecosystem diversity (i.e., bacteria, algae and macrophytes) and function (i.e., biomass production and biodegradation of organic contaminants). Our results indicate that increased urbanization, as inferred by water conductivity, total suspended solids and % impervious surface in the watershed, had variable effects on community composition, and to a lesser extent, biomass production. Biodegradation of organic contaminants (2, 4-D and 3-CBA) was relatively slow, suggesting a diminished role for contaminant removal in stormwater management ponds and urban wetlands.
- Bacteria
- Macrophyte
- Water Quality
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Presenters/Authors
Andrea Kirkwood
(), University of Ontario Institute of Technology, andrea.kirkwood@uoit.ca;
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Alexandra Johnson
(), University of Ontario Institute of Technology, alexandra.johnston@uoit.net;
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Carrie Strangway
(), University of Ontario Institute of Technology, carrie.strangway@gmail.com;
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Kathryn Thomas
(), University of Ontario Institute of Technology, kathomas31@gmail.com;
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