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RECORD NUMBER: 24 OF 66

OLS Field Name OLS Field Data
Main Title Effects of Ultraviolet-B Radiation on Plant Competition in Terrestrial Ecosystems.
Author Gold, W. G. ; Caldwell, M. M. ;
CORP Author Utah State Univ., Logan.;Corvallis Environmental Research Lab., OR.
Year Published 1983
Report Number EPA-R-808160; EPA-600/J-83-110;
Stock Number PB84-124916
Additional Subjects Plant growth ; Ultraviolet radiation ; Plant ecology ; Competition ; Biomass ; Production ; Ozone ; Wheat plants ; Stress(Physiology) ; Field tests ; Reduction ; Reprints ; Triticum aestivum ; Wheat plants ; Areena fatua ; Wild oat plants
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB84-124916 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 13p
Abstract
Evidence regarding the interaction of ultraviolet-B (UV-B, 280-320 nm) radiation and plant competition in terrestrial ecosystems is examined. The competitive interactions of some species pairs were affected even by ambient solar UV-B radiation (as exists without ozone depletion), when compared to control pairs grown without UV-B. Also the total shoot biomass of these species pairs was depressed under ambient UV-B. Recent field experiments have examined the competitive interactions of wheat (Triticum aestivum) and wild oat (Avena fatua) under a simulated increased UV-B regime resulting from a 16% ozone layer reduction when weighted with the generalized plant action spectrum. This increase in UV-B altered the competitive interactions of these two species without affecting the total shoot biomass production of the species pair.