Journal
ENVIRONMENTAL POLLUTION
Volume 171, Issue -, Pages 52-60Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2012.07.024
Keywords
Sediment pollution; Biomonitoring; Biomarkers; Venice lagoon; Ruditapes philippinarum
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Funding
- Venice Water Authority, Italian Ministry for Infrastructure and Transport, through its concessionary Consorzio Venezia Nuova
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The present study assessed whether the bivalve Ruditapes philippinarum may be appropriately deployed as a bioindicator in monitoring transitional environments, in terms of bioaccumulation potential and biomarker responses. The concentrations of trace metals, PAHs and PCBs were determined in sediments and clam tissue, and biomarkers were estimated at various levels of biological complexity (i.e. metallothioneins, lipofuscins, survival-in-air and reburrowing behaviour). Sediments and clams were collected biannually in 2004 and 2005 at eight sites within Venice lagoon, which were influenced differently by natural and anthropogenic impacts. Results highlighted that the broad variations of pollutant concentrations in sediments were not consistent either with the body residuals or with the biomarker responses. Consequently, on the basis of the observed weak responsiveness and sensitivity to anthropogenic stressors we suggest a more cautious use for R. philippinarum as sentinel organism, at least in estuarine sediments in the north Adriatic transitional areas. (C) 2012 Elsevier Ltd. All rights reserved.
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