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Published online 3 January 2006
Published in J Environ Qual 35:133-140 (2006)
DOI: 10.2134/jeq2005.0048
© 2006 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Fatty Acid Methyl Ester Analysis to Identify Sources of Soil in Surface Water

Gary M. Banowetza,*, Gerald W. Whittakera, Karen P. Dierksena, Mark D. Azevedoa, Ann C. Kennedyb, Stephen M. Griffitha and Jeffrey J. Steinera

a USDA-ARS, 3450 S.W. Campus Way, Corvallis, OR 97331
b USDA-ARS, 215 Johnson Hall, Pullman, WA 99164-6421



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  		Fig. 1. Specific sampling locations near the Calapooia River, Willamette Valley, Oregon. (1) A fallow perennial ryegrass seed production field (44°32'02'' N, 123°08'29'' W). (2) A field drainage location as it enters a forested riparian area (44°31'58'' N, 123°08'28'' W). (3) A forested riparian area (44°31'55'' N, 123°08'31'' W) and (4) its drainage to the Calapooia River channel (44°31'55'' N, 123°08'36'' W). (5) Surface sediment at the river's edge (44°31'55'' N, 123°08'36'' W). (6) A cut bank on the opposite side of the river (44°31'55'' N, 123°08'37'' W).

 


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  		Fig. 2. Principle component analysis of fatty acid methyl esters (FAMEs) extracted from six contrasting soil sites within an agricultural landscape. A = soil from fallow field; B = soil from ditch draining field; C = soil from adjacent riparian zone; D = soil from ditch draining riparian zone; E = soil from bottom sediment from adjacent stream; F = soil from bank of adjacent stream. Proportion of variance, Principle Components 1, 2, and 3: 0.44, 0.33, 0.23.

 




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