||Mercury study report to Congress : volume 6. an ecological assessment for anthropopogenic mercury emissions in the United States.
Nichols, J. W.
||Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards.
|| Office of Air Quality Planning and Standards and Office of Research and Development, U.S. Environmental Protection Agency,
Mercury--Environmental aspects--United States. ;
Mercury--Toxicology--United States. ;
Factory and trade waste--Environmental aspects--United States. ;
Mercury wastes--Environmental aspects--United States.
Air pollution effects(Animals) ;
Mercury compounds ;
Food chains ;
Biological effects ;
Environmental transport ;
Terrestrial ecosystems ;
Aquatic ecosystems ;
Food consumption ;
Air pollution sources ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||170 pages : illustrations, maps ; 28 cm
In this volume, an ecological assessment for anthropogenic mercury emissions is developed. Exposures of wildlife species to methylmercury through the aquatic food chain are compared with toxicity data calculated in the development of criteria for the protection of fish-eating avian and mammalian wildlife. Descriptions of mercury impacts on biota are provided in the problem formulation chapter. Estimates are provided of mercury deposition on a local scale in areas near emissions point sources. the distributions of selected fish-consuming wildlife species are overlaid with predicted high mercury areas of high concern (e.g., areas with low-pH surface water) and compared with predicted deposition of anthropogenic mercury emissions. Bioaccumulation factors (BAFs) for mercury in fish vary widely. Field data were used to calculate representive mean BAFs for different trophic levels based on dissolved methylmercury. Methylmercury criteria for the protection of piscivorous avian and mammalian wildlife are provided. This volume of the draft Report analyzes sources of variability and uncertainty in these estimates and identifies data that would strengthen the certainty of these findings.
Principal authors: Martha H. Keating [and others]. "December 1997." Includes bibliographical references. "EPA-452/R-97-008--Cover, v. 6. Microfiche.
v. I. Executive summary -- v. II. An inventory of anthropogenic mercury emissions in the United States -- v. III. Fate and transport of mercury in the environment -- v. IV. An assessment of exposure to mercury in the United States -- v. V. Health effects of mercury and mercury compounds -- v. VI. An ecological assessment for anthropogenic mercury emissions in the United States -- v. VII. Characterization of human health and wildlife risks from mercury exposure in the United States -- v. VIII. An evaluation of mercury control technologies and costs.