Record Display for the EPA National Library Catalog


Main Title Use of Marsh Plants for Toxicity Testing of Water and Sediment.
Author Walsh, G. E. ; Weber, D. E. ; Simon, T. L. ; Brashers, L. K. ; Moore, J. C. ;
CORP Author Environmental Research Lab., Gulf Breeze, FL.
Publisher c1992
Year Published 1992
Report Number EPA/600/A-92/121 ;CONTRIB-694;
Stock Number PB92-195882
Additional Subjects Swamps ; Wetlands ; Plants(Botany) ; Toxicity ; Water pollution effects(Plants) ; Herbicides ; Sediments ; Aquatic plants ; Growth ; pH ; Cations ; Survival ; Reprints ; Echinochloa crusgalli crusgalli ; Echinochloa crusgalli zelayensis ; Spartina alterniflora ; Norflurazon ; Metolachlor
Library Call Number Additional Info Location Last
NTIS  PB92-195882 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 17p
The freshwater wetland plants, Echinochloa crusgalli crusgalli and Echinochloa crusgalli zelayensis, and the saltmarsh plant Spartina alterniflora were exposed to the herbicides metolachlor and norflurazon in two types of toxicity tests: (1) seed germination and early seedling growth in water, and (2) seedling survival and growth in natural and synthetic sediments. The synthetic sediments were formulated to be similar to the natural sediments with regard to particle size distribution and organic content. The herbicides did not affect rate of germination, but significantly inhibited rate of early growth and survival and rate of growth of older seedlings in sediments. Echinochloa was more sensitive than Spartina to both herbicides. Inhibition of the growth rates of the two varieties of E. crusgalli was similar in natural and synthetic sediments, but inhibition of growth of S. alterniflora was greater in synthetic than in natural sediment. It is concluded that the species tested may be used for estimation of potential effects of toxicants on wetland plants and that synthetic sediments of known composition may be used in sediment toxicity tests.