Lipid composition of suspended particulate matter (SPM) in a southeastern blackwater stream
Gary L. Mills1,2, J. Vaun McArthur1, and Charlotte P. Wolfe1
River Ecology Laboratory, University of Georgia, Drawer E, Aiken, SC 29802,
Suspended particulate matter (SPM) was collected seasonally for 1
yr at third- and fifth-order sites in a blackwater stream on the coastal
plain in South Carolina. Fatty acids with carbon chain lengths from C12-C32
were the most abundant component among the lipid classes examined with
total concentrations varying from 8.5 to 60.2µg L -1.
Unsaturated fatty acids predominated while significant concentrations
of the even-chained saturated components C24-C30
derived from cuticular plant waxes were also found. Concentrations of
aliphatic alcohols, with carbon chain lengths between C16 and
C30, ranged from 0.52 to 2.73µg L -1 and was
dominated by the higher molecular weight compounds (C22-C30)
derived primarily from cuticular plant waxes. Total hydrocarbon concentrations
ranged from 0.35 to 5.66µg L-1 and showed no discernible
trends with time or consistent difference between sites. The hydrocarbon
assemblage observed indicates that these components are entirely of biogenic
origin with no detectable anthropogenic contribution.
Keywords: Lipids; Suspended solids; SPM; POM; Particulate organic matter; Fatty acids; Alcohols; Hydrocarbons; Streams
SREL Reprint #2671
Mills, G. L., J. V. McArthur, and C. P. Wolfe. 2003. Lipid composition of suspended particulate matter (SPM) in a southeastern blackwater stream. Water Research 37:1783-1793.