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...
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...
Reduction of stratospheric ozone caused by human
perturbation with halocarbon compounds and the consequent
increase in mid-wavelength ultraviolet radiation (UV-B
radiation. 290-320 nm) reaching the earth's surface could
have deleterious ecological effects on marine primary
producers. Unialgal and mixed cultures of Thalassiosira
pseudonana and Thalassiosira weisflogii were exposed to
three...
Global increases in ultraviolet-B radiation (UVBR) have the potential to alter marine primary production and to affect carbon cycles and marine trophic dynamics. Estimates of UVBR induced photoinhibition have varied greatly, indicating that a common dose-response by marine phytoplankton may not occur from place to place. An action spectrum describing...
Due to the presence of the earth's ozone layer, radiation of
the shorter solar wavelengths is reduced during penetration of the
atmosphere. Increases in chlorofluoromethanes and nitrogen oxides
may significantly decrease the ozone concentration, resulting in
shorter wavelength penetration, most notably UV-B (290-320 nm)
radiation. Various studies have found UV-B...
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...