Forecasting effects of SO/sub 2/ pollution on growth and succession in a western conifer forest
A simulator has been developed for the mixed conifer forest type of the Sierra Nevada, California to forecast the effects of SO/sub 2/ on forest growth and succession. The model simulates recruitment, growth, and death of each tree and is based on a northeastern USA simulator with extensive modifications. These modifications include the introduction of fire ecology, temporal seed crop patterns unique to the Sierra, and water stress. Pollutant stress is modeled as an effect on tree growth. The model simulates the shift from the ponderosa pine dominated forest type to the white fir dominated mixed conifer type as elevation increases from 5000 to 6000 ft. It also simulates the fire-suppression of white fir and the fire-climax of ponderosa pine. For a 10% growth reduction of ponderosa pine from pollutant stress and with growth reductions in other species as determined by their relative sensitivities, standing crops of ponderosa pine were reduced and white fir increased.
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6637422
- Report Number(s):
- UCRL-84068; CONF-800649-2
- Resource Relation:
- Conference: International symposium on effects of air pollutants on mediterranean and temperate forest ecosystems, Riverside, CA, USA, 22 Jun 1980
- Country of Publication:
- United States
- Language:
- English
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Process model of fire ecology and succession in a mixed-conifer forest
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Related Subjects
FORESTS
ECOLOGY
PLANT GROWTH
SULFUR DIOXIDE
ENVIRONMENTAL IMPACTS
AIR POLLUTION
BIOLOGICAL STRESS
CALIFORNIA
DEATH
MATHEMATICAL MODELS
THEORETICAL DATA
CHALCOGENIDES
DATA
GROWTH
INFORMATION
NORTH AMERICA
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POLLUTION
SULFUR COMPOUNDS
SULFUR OXIDES
USA
WESTERN REGION
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)