TITLE

The Effects of the Sumter Wastewater Treatment Plant on the Survival and Reproduction of Ceriodaphnia dubia in Chronic Toxicity Tests

AUTHOR(S)
Worley, Erin; Fernandes, Pearl R.; Harmon, S. Michele; Steinmetz, Jeff
PUB. DATE
March 2010
SOURCE
Journal of the South Carolina Academy of Science;2010, Vol. 8 Issue 1, p4
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The Pocotaligo River is a freshwater wetland that originates in Sumter, South Carolina. The wetland has endured severe anthropogenic and natural alterations to its ecology over the last few decades. Wetlands filter excess nutrients and are crucial for biodiversity. The Sumter Wastewater Treatment Plant (WTP) discharges its treated waste into the Pocotaligo swamp and is an important source of point pollution. The objective of the present study was to determine the possible effects of the WTP on water quality of the swamp using physiochemical measurements and a biological indicator Ceriodaphnia dubia (C. dubia), a freshwater zooplankton. Surface water samples were collected every two months from an upstream (control) site, a discharge (effluent) site, and a downstream site for a period of one year. Our results indicate that there were significant differences between the effluent site, and the upstream and downstream sites for seasonally averaged temperature, pH and dissolved oxygen, (p<0.05); however, no significant differences (p<0.05) were noted between upstream and downstream sites. There was a significant difference (p<0.05) between the upstream and downstream sites for total dissolved solids and phosphorous, but no significant differences in concentration of ammonia, nitrite and nitrate. There was no significant difference in mortality, but some reduction in reproductive success among C. dubia was noted between the three sites. Presently, the WTP is adequately treating its sewage before discharge. However, a long term study is necessary for more definitive conclusions.
ACCESSION #
59868202

 

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