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

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

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

Source	δ¹³C (per mil)	δ¹⁵N (per mil)	C/N (atomic ratio)
This study	-30.4 to -21.1	-3.0 to 5.4	20 to 111
Typical reported range¹	-32 to -22	-10 to 10	15 to >50

¹Typical reported range for vascular plants (C3 pathway) from Finlay and Kendall (2007).

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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