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The effects of UV radiation A and B on diurnal variation in photosynthesis in three taxonomically and ecologically diverse microbial mats
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ABSTRACT
Photosynthetic primary production, the basis of most global food chains, is inhibited by UV radiation. Evaluating UV inhibition is therefore important for assessing the role of natural levels of UV radiation in regulating ecosystem behavior as well as the potential impact of stratospheric ozone depletion on global ecosystems. As both photosynthesis and UV fluxes are subject to diurnal variations, we examined the diurnal variability of the effect of UV radiation on photosynthesis in three diverse algal mats. In one of the mats (Cyanidium caldarium) a small mean decrease in primary ...
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Differential responses of littoral communities to ultraviolet radiation in an alpine lake.
; INTRODUCTION The direct effects of ultraviolet (UV) radiation on aquatic food webs may be mediated...adaptive strategies and habitat conditions. UV radiation can inhibit algal photosynthesis (Moeller...show a wide range of sensitivities to UV radiation (Jokiel and York 1984, Xiong et ...
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UV radiation decreasing over U.S.? (ultra-violet radiation)
; UV radiation decreasing over U.S.? Long-term measurements of ultraviolet (UV) radiation from the sun are not living up to scientific...1974 and 1985, they report, the amount of UV radiation appears to have decreased. However, some scientists...
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25 years of UV-induced Immunosuppression Mediated by T Cells-From Disregarded T Suppressor Cells to Highly Respected Regulatory T Cells[dagger]
; ...more than 25 years it is known that UV radiation, in particular the UVB range suppresses...immunosuppression by immunosuppressive drugs, UV radiation does not compromise the immune system...hypersensitivity. Induction of these Tregs by UV radiation is an active process which ...
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Ultraviolet increase - potential risks scary
; ...potentially more damaging. Skin cancer. Some UV radiation already reaches Earth - the closer to...skin cancer. Animal studies also link UV radiation to skin cancer. A New York University...estimated that each 1 percent increase in UV radiation would increase skin cancers by 1.5 to...
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Protecting children from Ultraviolet Radiation--Information from the World Health Organization. (EH Update).
; Ultraviolet (UV) radiation is one component of solar radiation...atmosphere is reduced, and more UV radiation, in particular the more harmful...residents to extreme levels of solar UV radiation. Local authorities warned residents...
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Biological Monitoring of Solar UV Radiation at 17 Sites in Asia, Europe and South America from 1999 to 2004
; ...biologically effective dose of ambient UV radiation has been developed using UV-sensitive...global and long-time monitoring of solar UV radiation, in particular at tropical sites where...is taking place. INTRODUCTION Solar UV radiation is a ubiquitous environmental agent...
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An improved algorithm for satellite-derived UV radiation
; ...Improved Algorithm for Satellite-derived UV Radiation ABSTRACT The improved algorithm surface...from 280 to 315 nm. INTRODUCTION Solar UV radiation is potentially harmful to a variety...the atmosphere. Increased exposure to UV radiation has multiple effects (3,4). As far as...
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Conidial Pigmentation Is Important to Tolerance Against Solar-simulated Radiation in the Entomopathogenic Fungus Metarhizium anisopliae
; ...importance of conidial pigmentation to solar UV radiation tolerance in the entomopathogenic fungus...effects of exposure to simulated solar UV radiation on the wild-type parent strain U.S...exposed or not exposed to simulated solar UV radiation. In addition to significantly ...
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Variability of UV Irradiance in Europe
; ...diurnal and annual variability of solar UV radiation in Europe is described for different...While ozone is a strong absorber of UV radiation its effect is relatively constant when...higher organisms ultimately depend. The UV radiation at the short-wave end of the solar spectrum...
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UV radiation, autoimmunity, and questions galore
; ...conundrum: The effects of ultraviolet (UV) radiation from sun exposure can induce the onset...Institute of Environmental Health Sciences. UV radiation encompasses the electromagnetic spectrum...Harvard researchers showed recently that UV radiation absorbed from working in the sun ...
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