Physiological and Genetic Aspects of Toxicity in Hudson River Species

doi:10.1017/CBO9780511550539.032

30 - Physiological and Genetic Aspects of Toxicity in Hudson River Species

Published online by Cambridge University Press: 06 January 2010

Isaac Wirgin ,

Judith S. Weis and

Anne E. McElroy

Edited by

Jeffrey S. Levinton and

John R. Waldman

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Isaac Wirgin: Affiliation:
Nelson Institute of Environmental Medicine, New York University School of Medicine
Judith S. Weis: Affiliation:
Department of Biological Sciences, Rutgers University
Anne E. McElroy: Affiliation:
Marine Sciences Research Center
Jeffrey S. Levinton: Affiliation:
State University of New York, Stony Brook

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Summary

abstract The Hudson River Estuary has been polluted for many decades with organic contaminants including PCBs, dioxins/furans, PAHs, pesticides, and a variety of toxic metals, including cadmium and mercury. Most of these toxicants are poorly metabolized, highly persistent, bioaccumulative, and biomagnify in Hudson River populations, sometimes to record high levels. Many surveys have quantified tissue levels of these contaminants in resource species, but despite public concern and a need to evaluate toxicities for regulatory actions, few studies have directly addressed their biological impacts on Hudson River populations. With several notable exceptions, toxicant-induced perturbations are not frequently observed in Hudson River populations, even those for which high levels of exposure have been documented. This may have resulted from the ability of populations to acquire resistance to high levels of contaminants, either through genetic adaptations or compensatory physiological acclimation responses. While offering short-term benefits to impacted populations, resistance may be associated with evolutionary costs to populations and may compromise the viability of affected communities. Ideally, in the future, contaminant studies should focus on those species for which toxic alterations have been observed which may impact population viability, their levels of contamination should be quantified, and controlled laboratory experiments should be conducted to confirm that the contaminants of concern are able to induce these toxic manifestations in the affected taxon.

The Problem: Assessment of Toxicity of Hudson River-borne Pollutants

There is a need for government agencies to evaluate the toxic impacts of contaminants on the Hudson River (HR) biota to determine if damage to its populations has occurred and to guide remediation efforts.

Type: Chapter
Information: The Hudson River Estuary , pp. 441 - 464

DOI: https://doi.org/10.1017/CBO9780511550539.032 [Opens in a new window]

Publisher: Cambridge University Press

Print publication year: 2006

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