Record Display for the EPA National Library Catalog
RECORD NUMBER: 32 OF 46| Main Title | Research Plan: Interactive Effects of O3 and CO2 on the Ponderosa Pine Plant/Litter/Soil System. | |||||||||||
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| Author | Olszyk, D. M. ; Tingey, D. T. ; Johnson, M. ; Seidler, R. ; Watrud, L. ; | |||||||||||
| CORP Author | National Health and Environmental Effects Research Lab., Corvallis, OR. Western Ecology Div. ;Illinois Univ., Corvallis, OR. ;National Research Council, Corvallis, OR. | |||||||||||
| Publisher | Sep 97 | |||||||||||
| Year Published | 1997 | |||||||||||
| Report Number | EPA/600/R-97/126; | |||||||||||
| Stock Number | PB98-115306 | |||||||||||
| Additional Subjects | Ponderosa pine trees ; Air pollution effects(Plants) ; Ozone ; Carbon dioxide ; Coniferous forests ; Forest soils ; Biomass ; Leaves ; Seedlings ; Greenhouse gases ; Ecological concentration ; Exposure ; Ecosystems ; Plant ecology ; Hydrologic cycle ; Carbon cycle ; Nitrogen cycle ; Photochemical reactions ; Terracosms | |||||||||||
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| Collation | 124p | |||||||||||
| Abstract | To improve our understanding, this study determines whether carbon dioxide (CO2) which stimulates C and N, but inhibits H2O cycling in an ecosystem; affects the response of a tree species to ozone (O3) which inhibits C,N, and H2O cycling. The ponderosa pine soil/tree seedling system is used, as it is widespread in the western U.S., and is known to be affected individually by both increasing CO2 and O3. The study utilizes chambered 'terracosms', to examine above- and below-ground responses. The study tests three hypothesis: (1) elevated O decreases C, N and H2O cycling rates; (2) elevated CO2 increases C, N, and decreases H2O cycling rates; and (3) elevated CO2 eliminates negative effects of O3 and C and N cycling rates and has an additive negative effect on H2O cycling rates. |