2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/21/2018 | 11:30 AM - 11:45 AM | METABOLISM IN AN AGRICULTURAL STREAM: IMPACTED RIVERSCAPES RETAIN LONGITUDINAL COMPLEXITY | 330 B
METABOLISM IN AN AGRICULTURAL STREAM: IMPACTED RIVERSCAPES RETAIN LONGITUDINAL COMPLEXITY
Stream metabolism is an integrative measure of ecosystem function which is both a responder to and a driver of shifts in overall stream health. While metabolism is well understood in temperate systems, we know less about the spatial and temporal variability of metabolism in semi-arid regions. Marsh Creek, an agriculturally impacted stream in southeastern Idaho, is characterized by high turbidity, yet is still highly productive within the growing season. We measured daily ecosystem metabolism at 4 locations along ~75 km of Marsh Creek to understand within-stream controls on metabolism over one year with 3 additional sites during the growing season. Despite extensive stream modification and channelization, we find longitudinal heterogeneity in biomass, sedimentation, and nutrients such that GPP and ER varied as much over space as it did seasonally. We find different spatial and temporal drivers of metabolism. Contrary to our expectation that higher levels of turbidity would dampen GPP, we observed that turbidity was only a main driver of GPP at two of the seven sites. Our results reveal that complex interactions drive stream metabolism, even in highly modified landscapes.
- Primary Production
- Temporal
- Sediment
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Presenters/Authors
Sarah Stalder
(), Idaho State University, stalsara@isu.edu;
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Rebecca Hale
(), Idaho State University, halereb3@isu.edu;
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Colden Baxter
(), Idaho State University, baxtcold@isu.edu;
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Benjamin Crosby
(), Idaho State University, crosby@isu.edu;
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