Interactive Effects of Metals and PAHs on Benthic Food Webs
نویسندگان
چکیده
Our research examines the interactive effects of metal (Cu, Cr, Cd, Hg, and Pb) and diesel-fuel contaminants on the benthic food web of a coastal salt marsh and the specific role that Cu plays in this suite of contaminants. Specifically, we are examining how diesel and metal contaminants interact to influence the microbial (bacteria and microalgae), invertebrate, and juvenile fish components of the benthic community, and how their interactions influence trophic relationships among organisms. Previous studies have focused on either the ecotoxicological effects of metals or the effects of hydrocarbons, but essentially nothing is known about how these two classes of contaminants interact. The modes of toxicity of hydrocarbons and metals are quite different, and individually they may elicit different, sometimes opposite, ecological responses. Impacted field sediments, especially in harbors,
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