A weight of evidence approach for quality assessment of sediments impacted by an oil spill: The role of a set of biomarkers as a line of evidence

Abstract

To cite this version:Carmen Morales-Caselles, Inmaculada Riba, Carmen Sarasquete, T. Ángel Delvalls. A weight of evidence approach for quality assessment of sediments impacted by an oil spill: The role of a set of biomarkers as a line of evidence. Marine Environmental Research, Elsevier, 2008, 67 (1) This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. In an attempt to incorporate both line of evidence (LOE) and classical weight of 25 evidence (WOE) approaches for the assessment of sediment quality, a set of biomarkers 26 ACCEPTED MANUSCRIPT 1 A WEIGHT OF EVIDENCE APPROACH FOR QUALITY ASSESSMENT OF 1 SEDIMENTS IMPACTED BY AN OIL SPILL: THE ROLE OF A SET OF 2 BIOMARKERS AS A LINE OF EVIDENCEwere analyzed in target tissues of two invertebrate species after 28 days of exposure to 27 sediments impacted by oil (derived from the tanker Prestige, 2002). The integration of 28 biomarkers with sediment contamination, acute toxicity and benthic alteration 29 parameters provides an "early warning" tool which not only indicates the environmental 30 quality of an area, but also constitutes an advisory tool for potential ecological risks. 31The selected biomarkers provide information about the first biological responses due to 32 the presence of contaminants in the environment providing predictable reports about 33 further effects to the ecosystem. The present study demonstrates that the use of a set of 34 biomarkers as part of a WOE approach designed to assess contaminated sediments 35 contributes added value to the classical LOE and allows characterisation of the 36 environmental status of the studied area in a more precise and accurate way. 37

Sediment quality assessment in tidal salt marshes in Northern California, USA: An evaluation of multiple lines of evidence approach

“…Multiple lines of evidence approach has been used for more than decades and become the most commonly used method in assessing sediment quality because it can significantly improve the discriminatory power compared to single line of evidence approach Morales-Casselles et al, 2009;Hall and Giddings, 2000;Long and Chapman, 1985). The present study added additional lines of evidence such as chronic sublethal responses in field-exposed resident species to expand traditional multiple lines of evidence approach, which is SQT.…”

Sediment quality assessment in tidal salt marshes in northern California, USA: An evaluation of multiple lines of evidence approach

“…Data points in circles are outliers (greater than average ±2 standard deviation) that are not included in regression analysis. power compared to single line of evidence approach Morales-Casselles et al, 2009;Hall and Giddings, 2000;Long and Chapman, 1985). The present study added additional lines of evidence such as chronic sublethal responses in field-exposed resident species to expand traditional multiple lines of evidence approach, which is SQT.…”

Integrative assessment of sediment quality in lower basin affected by former mining in Brazil

“…Relationships among variables at each study site (SB, R, P) were explored using the multivariate technique factor analysis (FA), in which principal component analysis (PCA) was used as the extraction procedure following methods described by other authors (Del-Valls and Chapman 1998;DelValls et al 2002;Riba et al 2004;Morales-Caselles et al 2009;Martín-Díaz et al 2009). The geochemical characteristics of the sediments (TOC percentage, fines percentage, metal concentrations-As, Ba, Co, Cr, Cs, Cu, Ni, Pb, Sn, Sr, Ti, U and V), toxic responses based on reburial activity (ET 50 ) and C. fluminea biomarker responses of toxicity bioassays (activities of GST, GR, GPx, AChE, MTs, LPO and DNA damage; n = 48) and metal(loid) bioaccumulation in soft tissue (As, Ba, Co, Cr, Cs, Cu, Ni, Pb, Sn, Sr, Zn, n = 15) were integrated using the FA/PCA.…”