Effects of acid fog and ozone on conifers. Final report
This study evaluated the effects of acidic fog (pH 2.0, 3.0, or 4.0) on the physiological, biochemical, and growth responses of two coniferous tree species (Pinus ponderosa and Abies concolor), and determined if exposure to acidic fog predisposed the tree seedlings to the phytotoxic effects of ozone (O{sub 3}). Results provide evidence that the growth and metabolic responses of two coniferous tree species could be altered by multiple applications of acidic fog, and by exposure to ambient O{sub 3}. In general, the alterations were slight to modest, which may be attributed to the low degree of stress severity, and the slow rate of tree growth. The findings indicate that exposure to acidic fog followed by O{sub 3} does not cause detectable changes in conifer seedling growth within a single-growing season. Nevertheless, it is clear that acidic fog and O{sub 3} cause temporal alterations in seedling physiology and biochemistry.
- Research Organization:
- California Univ., Riverside, CA (USA). Statewide Air Pollution Research Center
- OSTI ID:
- 5367499
- Report Number(s):
- PB-89-222715/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ACID RAIN
BIOLOGICAL EFFECTS
AIR POLLUTION
FIRS
ENVIRONMENTAL IMPACTS
FOG
OZONE
PINES
PLANT GROWTH
DOSE-RESPONSE RELATIONSHIPS
FORESTS
PROGRESS REPORT
SMOG
TOXICITY
ATMOSPHERIC PRECIPITATIONS
CONIFERS
DOCUMENT TYPES
GROWTH
PINOPHYTA
PLANTS
POLLUTION
RAIN
TREES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
560300 - Chemicals Metabolism & Toxicology