Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Toxicity of Arsenite and Arsenate to the Marine Macroalga 'Champia parvula' (Rhodophyta).
Author Thursby, G. B. ; Steele, R. L. ;
CORP Author Environmental Research Lab., Narragansett, RI.
Year Published 1984
Report Number EPA/600/J-84/181;
Stock Number PB85-146827
Additional Subjects Toxicology ; Arsenite ; Arsenate ; Algae ; Reprints ; Champia parvula ; Water pollution effects(Plants)
Library Call Number Additional Info Location Last
NTIS  PB85-146827 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 10p
By a previously established test procedure that uses 4.5 micromoles phosphate in the medium, the marine red alga Champia parvula (C. Agardh) Harvey was shown to be more sensitive to arsenite (As(III)) than to arsenate (As(V)). Mature cystocarps (evidence of sexual reproduction) were formed when plants were exposed to 65 micrograms As(III)/L, but not when exposed to 95 micrograms As(III)/L. Three hundred micrograms As(III)/L was sufficient to kill C. parvula. Using the standardized test, plants grew just as well in 10,000 micrograms As(V)/L as they did in the controls; however, sexual reproduction did not occur at this concentration. Phosphate concentration up to 9.1 micromoles had little or no effect on As(III) toxicity. Arsenate toxicity, however, was inversely proportional to the amount of phosphate in the medium. In the absence of added phosphate, As(V) toxicity was similiar to that of As(III), except plants were still alive at 1,076 micrograms As(V)/L (although they did not grow).