Benthic Community Structure and Biomarker Induction in Grass Shrimp in an Estuarine System |
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| Authors: | E. Oberdörster M. Martin C. F. Ide J. A. McLachlan |
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| Affiliation: | (1) Tulane/Xavier Center for Bioenvironmental Research, 1430 Tulane Ave., SL-3, New Orleans, Louisiana 70112-2699, USA , US;(2) Department of Cell and Molecular Biology, Tulane University, 604 Lindy Boggs, New Orleans, Louisiana 70115, USA , US;(3) Department of Pharmacology, Tulane University, 1430 Tulane Ave., SL-3, New Orleans, Louisiana 70112-2699, USA , US |
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| Abstract: | The impact of polycyclic aromatic hydrocarbons (PAHs) and lead contamination on benthic community structure and grass shrimp (Palaeomonetes sp.) biochemical markers were investigated in a bayou that has been heavily contaminated by PAHs and heavy metals. The benthic community had decreased species richness as well as decreased numbers of individuals along a contamination gradient. Grass shrimp collected in the field showed a contaminant-gradient increase in heat shock protein 63 and cytochrome P450 1A (as measured by ECOD metabolism). Grass shrimp had elevated ECOD metabolism when exposed in the laboratory to sediments from the most contaminated site. However, individual variation was too great for statistically significant changes. In addition, heat shock protein levels were not significantly elevated in laboratory exposed shrimp. Benthic community structure and wild-caught grass shrimp are clearly impacted in this bayou. Received: 4 December 1998/Accepted: 9 February 1999 |
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