EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/21/2018 | 9:30 AM - 9:45 AM | STREAM METABOLISM IN AGRICULTURAL AND URBAN LANDSCAPES: SPATIAL VS TEMPORAL PATTERNS | 330 A
STREAM METABOLISM IN AGRICULTURAL AND URBAN LANDSCAPES: SPATIAL VS TEMPORAL PATTERNS
There is need for integrating stream processes into characterizing and managing stream ecosystems. Through several regional stream quality assessments, the USGS is assessing the interaction of chemical and physical stressors on biological communities. Spatial and temporal patterns in stream metabolism were quantified, and related to benthic community metrics at ten sites in the Midwest and Southeast U.S. High-frequency dissolved oxygen and nitrate data were collected over a six month period at each site. Spatial comparisons during August found average Gross Primary Production ranging from 0.1 to 1.8 g O2/m2/d, Ecosystem Respiration from 0.37 to 3.55 g O2/m2/d, and Net Daily Metabolism from -3 to 0.4. Watershed features, as in drainage area, and riparian canopy were important explanatory variables. Site-specific temporal patterns revealed that metabolism parameters at reference sites were influenced by nitrate and depth, whereas agricultural sites were controlled primarily by physical features, as in depth. Frequent changes in stream flow in urban streams often resulted in a lack of any distinct pattern in metabolism. For the spatial comparison, we found that both ER and GPP were correlated with a subset of biological metrics used for classifying stream condition.
- Landuse
- Disturbance
- Nutrients
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Presenters/Authors
Mark Munn
(), U.S. Geological Survey, Tacoma, WA, mdmunn@usgs.gov;
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Christopher Konrad
(), US Geological Survey, cpkonrad@usgs.gov;
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Matthew Miller
(), U.S. Geological Survey, mamiller@usgs.gov;
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Ian Waite
(), U.S. Geological Survey, Portland, OR, iwaite@usgs.gov;
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