2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/21/2018 | 11:00 AM - 11:15 AM | THE URBAN STREAM SYNDROME: EXOTIC BIOTIC AND ERRATIC ABIOTIC ASPECTS OF URBANIZED HEADWATERS | 310 A
THE URBAN STREAM SYNDROME: EXOTIC BIOTIC AND ERRATIC ABIOTIC ASPECTS OF URBANIZED HEADWATERS
In urban catchments, headwater streams undergo numerous disturbances such as pollution, channelization, and storm/sewage water management. Thus, abiotic and biotic properties of urbanized headwaters substantially differ from their natural counterparts. We studied seven stream networks across a gradient of urbanization in the Greater Toronto Area to answer a) how are headwater biological and physical properties altered by urbanization, b) what are the cumulative consequences of headwater modification for freshwater communities and processes downstream, and c) how can we manage urban stream networks to sustain resilient landscapes. Our results show that proportion of headwater burial increases along the urbanization gradient and the presence or absence of a headwater is a function of stream size and level of urbanization. The present headwaters experience flashier hydrology, decreased water quality and substantial modification of riparian areas. This results in numerous effects on aquatic habitat (channel widening, water scarcity) and consequent changes in freshwater communities (shifts in aquatic macroinvertebrate assemblages, increased algae growth) and processes (higher respiration and decomposition). The land-use effects on the response variables differed depending on whether local or catchment scales were considered, indicating that management decisions need to considered spatial scale.
- Network
- Landuse
- Disturbance
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Presenters/Authors
Lenka Kuglerová
(), Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, lenka.kuglerova@slu.se;
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Brian Kielstra
(), Department of Forest and Conservation Sciences, University of British Columbia, b.kielstra@alumni.ubc.ca;
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Dan Moore
(), Department of Geography, University of British Columbia, dan.moore@ubc.ca;
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John Richardson
(), Department of Forest and Conservation Sciences, University of British Columbia, john.richardson@ubc.ca;
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