Progress report for the project: Comparison of the response of mature branches and seedlings of Pinus ponderosa to atmospheric pollution

Technical Report · Sat Sep 01 04:00:00 EDT 1990

DOI:https://doi.org/10.2172/6481193· OSTI ID:6481193

Houpis, J L.J.; Anderson, P D; Benes, S E; Phelps, S P; Loeffler, A T

This progress report details Lawrence Livermore National Laboratory's (LLNL) performance regarding the projects Comparison of the Response of Mature Branches and Seedlings of Pinus ponderosa to Atmospheric Pollution'' and Effects of Ozone, acid Precipitation, and Their Interactions on Mature Branches and Seedlings of Ponderosa Pine'' for the months of November 1989 to June 1990. During the last eight months, we have initiated ozone and acid precipitation exposures, and we began intensive growth, morphological, and physiological measurements. During these major physiological measurement periods, we measured photosynthesis, transpiration, stomatal conductance, respiration, antioxidant activity, pigmentation, and foliar nutrient concentration. We have also concluded the analysis of our branch autonomy experiment, which we conducted in the fall. We determined that virtually no carbon is exported among branches in close proximity to one another. This conclusion assists in validating the approach of using branches and branch exposure chambers as a means of assessing the effects of air pollution on mature trees of Ponderosa pine. 6 refs., 4 figs., 3 tabs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6481193
• Report Number(s): UCRL-21001-90-1; ON: DE91000802
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ACID RAIN
AIR POLLUTION
ANTIOXIDANTS
ATMOSPHERIC PRECIPITATIONS
BIOLOGICAL EFFECTS
COMPARATIVE EVALUATIONS
CONIFERS
DAILY VARIATIONS
DOCUMENT TYPES
ENVIRONMENT
GROWTH
MONITORING
MORPHOLOGY
OZONE
PHYSIOLOGY
PINES
PINOPHYTA
PLANT GROWTH
PLANTS
POLLUTION
PROGRESS REPORT
RAIN
SEASONAL VARIATIONS
SEEDLINGS
TREES
VARIATIONS