USGS Scientific Investigations Report 2010–5154 - Use of Stable Isotopes of Carbon and Nitrogen to Identify Sources of Organic Matter to Bed Sediments of the Tualatin River, Oregon

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Scientific Investigations Report 2010–5154

Prepared in cooperation with Clean Water Services

Use of Stable Isotopes of Carbon and Nitrogen to Identify Sources of Organic Matter to Bed Sediments of the Tualatin River, Oregon

By Bernadine A. Bonn and Stewart A. Rounds

Tables

Table 1. Summary of sample collection at each sampling site, Tualatin River basin, Oregon.

Table 2. Relation between acidified and unacidified δ¹³C, δ¹⁵N, and C/N results for samples from the Tualatin River basin, Oregon.

Table 3. Confidence intervals of sample means for samples from the Tualatin River basin, Oregon.

Table 4. Ranges of δ¹³C and δ¹⁵N values and C/N ratios for terrestrial plant material.

Table 5. Results of principal components analysis.

Table 6. Mean values and confidence intervals of stable isotope compositions and C/N ratios for samples collected in the Tualatin River basin, Oregon.

First posted August 17, 2010

Report PDF (2.6 MB)

For additional information contact:
Director, Oregon Water Science Center
U.S. Geological Survey
2130 SW 5th Ave.
Portland, Oregon 97201
http://or.water.usgs.gov

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