2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/24/2018 | 11:15 AM - 11:30 AM | TEMPORAL PATTERNS OF STREAM METABOLISM IN THREE STREAMS EXPOSED TO DIFFERENT SOURCES OF ANTHROPOGENIC NUTRIENTS | 330 B
TEMPORAL PATTERNS OF STREAM METABOLISM IN THREE STREAMS EXPOSED TO DIFFERENT SOURCES OF ANTHROPOGENIC NUTRIENTS
Stream metabolism is associated with nutrient availability. However, the quantity and timing of nutrient delivery can vary with the source of nutrients, which may lead to among stream differences in stream metabolism. We investigated the influence that common anthropogenic nutrient sources have on temporal patterns of stream metabolism by comparing three mid-order streams exposed to either mechanical wastewater effluent, lagoon wastewater effluent, or non-point agricultural runoff. Gross primary production (GPP) and ecosystem respiration (ER) were estimated daily from June to October of 2013. Time series analyses will be used to identify differences in the temporal patterns of GPP and ER in streams exposed to different nutrient sources. In addition, multivariate analyses will be used to determine the associations among proximal drivers of stream metabolism and GPP and ER at each study site. We predict that episodic inputs of nutrients in the agricultural stream will result in greater temporal variability in GPP and ER compared to continuous inputs of nutrients from wastewater effluent. Moreover, light and discharge will be the main proximal controls of stream metabolism. Results will generate knowledge on the stability of ecosystem processes in human altered streams.
- Nutrients
- Landuse
- Bioassessment
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Presenters/Authors
Nolan J.T. Pearce
(), Western University & Canadian Rivers Institute, npearce7@uwo.ca;
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Jason J. Venkiteswaran
(), Wilfrid Laurier University, jvenkiteswaran@wlu.ca;
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Patricia A. Chambers
(), Environment and Climate Change Canada, 867 Lakeshore Rd., Burlington Ontario, Canada, L7R 4A6, patricia.chambers@canada.ca;
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Adam G. Yates
(), Western University & Canadian Rivers Institute, adam.yates@uwo.ca;
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