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  • Response to ultraviolet (UV-B) radiation by attached assemblages of estuarine diatoms

    Creator:
    Brooker, Deborah L.
    Abstract:
    Global atmospheric pollution from chlorofluorocarbons has the potential of causing significant reductions in the concentrations of stratospheric ozone. If the production of chlorofluorocarbons were to continue into the future at the rate prevalent in 1977, the steady state reduction in total global ozone could be between five percent to ten...
    Resource Type:
    Masters Thesis
    Full Text:
    effort to measure the effect of UV-B radiation on the colonization of new substrates by benthic diatoms

  • Effects of ultraviolet-B radiation on marine phytoplankton

    Creator:
    Behrenfeld, Michael Joseph
    Abstract:
    Global increases in ultraviolet-B radiation (UVBR:290- 320 nm) resulting from decreases in stratospheric ozone concentration have the potential to alter marine primary production and affect global climate and marine trophic dynamics. Effects of UVBR on phytoplankton carbon fixation were determined from open ocean exposure studies conducted off the coast of...
    Resource Type:
    Dissertation
    Full Text:
    in regions of nutrient limitation. Effects of Ultraviolet-B Radiation on Marine Phytoplankton by

  • Response of estuarine diatom assemblages to ultraviolet-B radiation (290-320 nm)

    Creator:
    Brooker, Deborah L., Worrest, Robert C.,, and Oregon State University
    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...
    Resource Type:
    Technical Report
    Full Text:
    enhanced levels of UV-B radiation appeared to have a stimulatory effect on the latter parameters. 17. KEY

  • Primary productivity in the southeast Pacific Ocean : effects of enhanced ultraviolet-B radiation

    Creator:
    Behrenfeld, Mike J.
    Abstract:
    Anthropogenic releases of trace gases into the atmosphere are causing a decrease in stratospheric ozone concentrations and a subsequent increase in solar ultraviolet-B (UV-B)(280-320 nm) radiation reaching the earth's surface. The objective of this study was to determine the acute effects of enhanced UV-B radiation on the primary production of...
    Resource Type:
    Masters Thesis
    Full Text:
    photosynthetically active (PAR) (400 - 750 nm) radiation, decrease the effect of UV-B radiation on photosynthesis