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Main Title Effects of Ultraviolet-B Radiation on Primary Production along Latitudinal Transects in the South Pacific Ocean.
Author Behrendeld, M. ; Hardy, J. ; Gucinski, H. ; Hanneman, A. ; Lee, H. ;
CORP Author AScI Corp., Newport, OR. ;Huxley Coll. of Environmental Studies, Bellingham, WA. ;ManTech Environmental Technology, Inc., Corvallis, OR.;Environmental Research Lab.-Narragansett, Newport, OR.
Publisher c1993
Year Published 1993
Report Number EPA-68-C0-0051; EPA/600/J-93/238;
Stock Number PB93-212454
Additional Subjects Phytoplankton ; Biological radiation effects ; Solar radiation ; Ultraviolet radiation ; Photosynthesis ; Primary biological productivity ; Dose-response relationships ; Aquatic ecosystems ; Marine biology ; Pacific Ocean ; Marine algae ;
Library Call Number Additional Info Location Last
NTIS  PB93-212454 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 16p
Ambient intensities of solar ultraviolet radiation inhibit photosynthesis in the upper layers of the oceans. The effect of ultraviolet-B radiation (UVBR) (290-320 nm) on marine phytoplankton carbon fixation during two latitudinal transects through the South Pacific ocean was measured to determine a dose-response model for estimating UVBR effects in natural surface populations and to identify latitudinal variation in UVBR sensitivity. Photoinhibition increased linearly with increasing doses of UVBR as weighted by the DNA action spectrum, with no apparent threshold for effect. The dose-rate response was nearly constant at low latitudes but varied at higher latitudes. Ambient intensities of UVBR cause photoinhibition and it is likely that even small increases in surface UVBR will cause additional photodamage. (Copyright (c) 1993 Elsevier Science Publishers.)