2022 Early Hearing Detection & Intervention Virtual Conference

March 13 - 15, 2022

<< BACK TO AGENDA

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

Presentation:
This presentation has not yet been uploaded.

Handouts:
Handout is not Available

Transcripts:
CART transcripts are NOT YET available, but will be posted shortly after the conference


Presenters/Authors

Mark Munn (), U.S. Geological Survey, Tacoma, WA, mdmunn@usgs.gov;


ASHA DISCLOSURE:

Financial -

Nonfinancial -

Christopher Konrad (), US Geological Survey, cpkonrad@usgs.gov;


ASHA DISCLOSURE:

Financial -

Nonfinancial -

Matthew Miller (), U.S. Geological Survey, mamiller@usgs.gov;


ASHA DISCLOSURE:

Financial -

Nonfinancial -

Ian Waite (), U.S. Geological Survey, Portland, OR, iwaite@usgs.gov;


ASHA DISCLOSURE:

Financial -

Nonfinancial -