Record Display for the EPA National Library Catalog


Main Title Metabolism of mercury compounds in microorganisms /
Author Colwell, Rita R., ; Nelson, Jr., John D.
Other Authors
Author Title of a Work
Nelson, John D.
CORP Author Maryland Univ., College Park. Dept. of Microbiology.;Environmental Research Lab., Narragansett, R.I.
Publisher U.S. Environmental Protection Agency, Environmental Research Laboratory ; Available from NTIS,
Year Published 1975
Report Number EPA/600/3-75/007; EPA-R-802529
Stock Number PB-249 000
Subjects Bacteria ; Mercury--toxicity ; Water Microbiology
Additional Subjects Biodeterioration ; Bacteria ; Mercury(Metal) ; Ecology ; Chesapeake Bay ; Marine biology ; Pseudomonas ; Estuaries ; Marine microorganisms ; Metabolism ; Resistance ; Physiology ; Microbial degradation
Library Call Number Additional Info Location Last
NTIS  PB-249 000 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation x, 84 pages : illustrations, map ; 28 cm.
The report describes the physiology and ecology of mercury-resistant and mercury-metabolizing bacteria from Chesapeake Bay. Evidence is presented which establishes a role for bacteria in the cycling of mercury in the estuarine environment. From the results of a survey of elemental mercury production among a group of randomly selected, HgCl2-resistant bacteria and mixed natural microbial populations, it was established that the enumeration of mercury-resistant bacteria by plate counting is a valid index of potential Hg(+2) metabolism in situ. The distribution of mercury-resistant bacteria was significantly different in water and sediment, from station to station, and seasonally; the proportion of Hg(+2)- resistant bacteria among the total, viable, heterotrophic bacterial population reached a reproducible maximum in Spring and was positively correlated with water turbidity, dissolved oxygen concentration, and mercury concentration in the sediment. These findings suggest that bacteria may contribute substantially to the mobilization and transformation of mercury from existing deposits in Chesapeake Bay.
Grant no. 802529. Includes bibliographical references (pages 74-80). Microfiche.