Abstract
The objectives of this study were to determine the effects of sediment contamination on the benthic macrofauna and to predict macrofaunal changes following remediation at a Superfund (uncontrolled hazardous waste) site in San Francisco Bay, California, USA. DDT and its metabolites (ΣDDT) were the contaminants of concern. With few small-scale exceptions, all (>100) other sediment contaminants ever measured at the site were present at background or non-toxic levels. In hierarchical regressions [Y=f(X 1, X 2, X 3), where X 1=sediment %silt + clay, X 2=sediment total organic carbon (OC), and X 3=log 10 (ΣDDT μg g−1 OC)] with data from samples collected at the study site, log10(ΣDDT μg g−1 OC) explained a highly significant amount of the variance in the infaunal index (II ) and log10(number of Amphipoda excluding Grandidierella japonica + 1) after statistically controlling for the potential effects of sediment %silt + clay and OC. The ratios of change of II and log10(number of Amphipoda excluding G. japonica + 1) with respect to log10(ΣDDT μg g−1 OC) were about −9:1 and −0.4:1, respectively. Most of the 92 species collected were present at low to moderate densities over the entire range of ΣDDT sediment concentrations. The bivalve Theora lubrica, tubificids, most polychaetes, a tanaid (Zeuxo normani), and an amphipod (G. japonica), were common, while four other amphipods (Ampelisca abdita, Corophium heteroceratum, Photis brevipes, Dulichia rhabdoplastis), a phoronid (Phoronis cf. pallida), a bivalve (Cryptomya californica), and a cumacean (Eudorella pacifica), were rare or absent from sites with high ΣDDT sediment-concentrations.
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Received: 1 August 1997 / Accepted: 13 August 1997
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Ferraro, S., Cole, F. Effects of DDT sediment-contamination on macrofaunal community structure and composition in San Francisco Bay. Marine Biology 130, 323–334 (1997). https://doi.org/10.1007/s002270050252
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DOI: https://doi.org/10.1007/s002270050252