Record Display for the EPA National Library Catalog

RECORD NUMBER: 13 OF 18

OLS Field Name OLS Field Data
Main Title Response of Estuarine Diatom Assemblages to Ultraviolet-B Radiation (290-320 nm).
Author Brooker, D. L. ; Worrest, R. C. ;
CORP Author Oregon State Univ., Corvallis.;Corvallis Environmental Research Lab., OR.
Year Published 1985
Report Number EPA-R-810288; EPA/600/D-85/016;
Stock Number PB85-157402
Additional Subjects Diatoms ; Solar Ultraviolet radiation ; Yaquina Estuary ; Exposure ; Light(Visible radiation) ; Greenhouses ; Substrates ; Chlorophylls ; Biomass ; Primary biological productivity ; Growth ; Radioactive isotopes ; Morphology ; Responses ; Food chains ; Ultraviolet B radiation ; Species diversity
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB85-157402 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 18p
Abstract
Artificial substrates colonized by diatoms from Yaquina Estuary, Oregon, were exposed to solar visible radiation and three levels of ultraviolet radiation (UV-B, 290-320 nm). Flow-through microcosms were constructed inside a glasshouse to serve as chambers for the artificial substrates. The artificial substrates were sampled during three spring/summer experiments. Chlorophyll a concentration, biomass (ash-free dry weight), primary productivity (radiocarbon uptake), and community composition were the parameters measured biweekly for each four-week experimental period. The results indicated that daily exposure to enhanced levels of UV-B radiation was associated with a decrease in species diversity of benthic diatom assemblages during all experiments after four weeks of growth.