Contaminants evaluation of Marais des Cygnes National Wildlife Refuge in Kansas and Missouri,USA |
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Authors: | George T Allen Tom J Nash David E Janes |
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Institution: | (1) US Fish and Wildlife Service, 315 Houston Street, 66502-6172 Manhattan, Kansas, USA;(2) US Fish and Wildlife Service, 608 East Cherry, 65205 Columbia, Missouri, USA;(3) Division of Realty Refuges and Wildlife US Fish and Wildlife Service, Denver Federal Center, PO Box 25486, 80225 Denver, Colorado, USA |
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Abstract: | At the new Marais des Cygnes National Wildlife Refuge in Linn County, Kansas, and Bates County, Missouri, USA, we evaluated
long-lived contaminants before acquisition of the land for the refuge. We sampled sediments at 16 locations and fish at seven
locations. The samples were analyzed for metals and for chlorinated hydrocarbon compounds. Selected sediment samples also
were analyzed for aliphatic hydrocarbons. Arsenic concentrations in sediment samples from six locations were elevated compared
to US norms, but arsenic was not detected in any fish composite. Mercury concentrations in largemouth bass from two locations
were comparable to the 85th percentile concentrations in nationwide fish collections. Most sediment concentrations of other
metals were unlikely to have detrimental effects on biota. No chlorinated hydrocarbons were detected in any sediment sample.
Chlordane compound concentrations in fish composites from two sites at the eastern end of the sampling area were 0.127 and
0.228 μg/g wet weight, respectively, which are high enough to cause concern. Most aliphatic hydrocarbons detected were found
at low concentrations and probably were natural in origin. We concluded that there are no serious contaminants concerns within
the project area, but past use of arsenical pesticides may mean a legacy of elevated soil arsenic levels in parts of the area
and some use of banned pesticides such as chlordane and DDT likely is still occurring near the refuge. |
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Keywords: | Contaminants Kansas Missouri Marais des Cygnes National Wildlife Refuge Sediments Fish |
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