Modeling the impact of SO/sub 2/ pollution on the community structure and succession in a coniferous forest of the Western USA

Conference · Tue Apr 01 04:00:00 EST 1980

OSTI ID:5260956

Kercher, J R; Axelrod, M C

A model is being developed to project the future impact of SO/sub 2/ pollution on western USA forests. For a case study, the model is being applied to the Ponderosa pine (Pinus ponderosa) and mixed conifer forests of the Sierra Nevada mountains of California, USA. The associated species in these forests are Abies concolor (White fir), Pseudotsuga menziesii (Douglas-fir), Pinus lambertiana (sugar pine), Libocedrus decurrens (incense-cedar), Quercus kelloggii (California black oak), and Pinus jeffreyi (Jeffrey pine). The model is based on JABOWA a simulator of forests of the northeastern USA. For use in western forests, extensive modifications are needed in JABOWA in temporal seed-crop patterns and by introducing fire ecology and moisture stress on vegetation. The model establishes individual seedlings, grows them individually, and simulates mortality of each one. A structure chart of the succession model is given. The effects of SO/sub 2/ on growth rate on Ponderosa pine, white fir, and Douglas fir are plotted.

• Research Organization: California Univ., Livermore (USA). Lawrence Livermore Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5260956
• Report Number(s): UCRL-83453; CONF-800365-1
• Country of Publication: United States
• Language: English

Related Subjects

560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL EFFECTS
CHALCOGENIDES
CONIFERS
ENVIRONMENTAL IMPACTS
FORESTS
GROWTH
INHIBITION
MATHEMATICAL MODELS
OXIDES
OXYGEN COMPOUNDS
PINES
PLANT GROWTH
PLANTS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TREES