Interactive effects of natural and anthropogenic factors on growth and physiology of southern red spruce
Field and laboratory studies are underway to characterize physiologial changes associated with the decline of red spruce (Picea rubens Sarg.) at high elevations in the Great Smocky Mountains National Park. Two research plots have been established on Clingman's Dome at 1720 m and 1935 m elevations to document the magnitude of growth changes at sites experiencing varying degrees of growth decline and to explore the physiological basis of observed differences. The objective is to evaluate likely mechanisms of action and identify natural and anthropogenic factors influencing the observed growth patterns. Field measurements include historical and current radial growth of mature trees and saplings, and seasonal patterns of carbon assimilation, carbon allocation, and water relations of saplings. Laboratory experiments include dose response exposures with H/sub 2/O/sub 2/, toxicity screening studies with Al, Mn, and Ca, and characterization of the foliar uptake and metabolism of nitrogen oxides. 9 refs., 2 figs., 6 tabs.
- Research Organization:
- Oak Ridge National Lab., TN (USA); Phyton Technologies, Oak Ridge, TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5394561
- Report Number(s):
- CONF-8710247-1; ON: DE88003766
- Resource Relation:
- Conference: Research symposium on the effects of atmospheric pollution in spruce and fir forests in the Eastern United States and the Federal Republic of Germany, Burlington, VT, USA, 19 Oct 1987; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
POLLUTION SOURCES
COMPARATIVE EVALUATIONS
SPRUCES
PLANT GROWTH
AIR POLLUTION
ALUMINIUM COMPOUNDS
APPALACHIAN MOUNTAINS
CALCIUM COMPOUNDS
DOSE-RESPONSE RELATIONSHIPS
FIELD TESTS
HYDROGEN PEROXIDE
MANGANESE COMPOUNDS
MORTALITY
PATHOLOGICAL CHANGES
RESPONSE MODIFYING FACTORS
ALKALINE EARTH METAL COMPOUNDS
GROWTH
HYDROGEN COMPOUNDS
MOUNTAINS
OXYGEN COMPOUNDS
PEROXIDES
PLANTS
POLLUTION
TESTING
TRANSITION ELEMENT COMPOUNDS
TREES
560300* - Chemicals Metabolism & Toxicology
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)