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Abstract
Seaford, K.D., B.G.
Loganathan and D.A. Owen. 2002. Effect of water level fluctuations on
selected organic compounds and metals concentrations in surface sediments
from Ledbetter Embayment of Kentucky Lake. JEMREST 1:64-79
DOI:
10.4029/2002jemrest1no15
This study is part of Murray State
University's Collaborative Research
in Undergraduate Institutions (C-RUI) Program established to quantitatively
characterize the effect of human induced, seasonal water level fluctuations
upon biogeochemical and ecological processes within the littoral zone of the Kentucky Lake. This study describes the effect
of water level changes on selected organic pollutants and inorganic elements
in sediments of Ledbetter Embayment of Kentucky Lake. Polychlorinated
biphenyls (PCBs), chlorinated pesticides (DDTs, hexachlorobenzene (HCB),
chlordane compounds (CHLs)) and selected metals (manganese, copper and strontium)
were analyzed in surface sediments collected during low pool and high pool
seasons of 2000-2001. PCBs and chlorinated pesticides in sediments presented
similar distribution patterns during low pool and high pool seasons.
Individual analyte concentrations in sediments were relatively higher during
the high pool seasons. A similar trend was also observed for Mn (low pool 113
mg/kg dry sediment and high pool 241 mg/kg dry sediment) and Sr (low pool
4.77 mg/kg dry sediment and high pool 6.78 mg/kg dry sediment) concentrations
in the sediments. Copper concentrations (low pool 13.7 mg/kg dry sediment and
high pool 6.21 mg/kg dry sediment) in sediment showed a reverse trend. The
seasonal changes in the concentrations of the contaminants, including parent
compounds and their metabolites, in the Ledbetter Embayment indicate that the
exposure to biota varies during different seasons.
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