||Impact of UV-B Radiation Upon Estuarine Microcosms.
Worrest, Robert C. ;
Thomson, Bruce E. ;
Van Dyke, Henry ;
||Oregon State Univ., Corvallis. Dept. of General Science.;Corvallis Environmental Research Lab., OR.
Ultraviolet radiation ;
Primary biological productivity ;
Solar radiation ;
||Some EPA libraries have a fiche copy filed under the call number shown.
Twelve flow-through estuarine microcosms were exposed daily to four different levels of UV-B radiation. In addition to a natural level of visible solar radiation. The parameters studied over a four week period were phytoplankton community composition, plankton biomass (ash-free dry weight), chlorophyll a concentration and primary productivity (radiocarbon uptake). With increased exposure to UV-B radiation there was an obvious alteration of the community composition. Daily exposure to enhanced levels of UV-B radiation also depressed the biomass, the chlorophyll a concentration and the radiocarbon uptake of samples from the ecosystems. (Copyright (c) 1981 Pergamon Press Ltd.)