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 |
Checkout Status |
NTIS |
PB84-124916 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
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. |