Analysis of growth trends and variation in conifers from Arizona and New Mexico: youthful trees, competition, and densitometric chronologies
Graybill DA, Swetnam TW, Telewski FW, Park W. 1990. Analysis of growth trends and variation in conifers from Arizona and New Mexico: youthful trees, competition, and densitometric chronologies. Western Conifers Research Cooperative, Forest Response Program, EPA. Corvallis, OR
This study investigates abnormal variation in tree growth in conifers, mainly decreased growth after the mid-20th century. Chronologies from Rincon Mountains trees are included in the study. The growth decreases that were observed may be a result of drought effects, but evidence does not yet rule out air pollution as a contributing cause. More trees in the southern study areas showed decreased growth than those farther north, and pollution has been greater in the south. Competition was eliminated as a likely cause. Bibliography, 20 figures, 14 tables, 2 appendices.
- Type
- Published Report
- Authors
- Graybill, Donald; Swetnam, Thomas; Telewski, Frank; Park, Wonkyu
- Date of Issue
- 1990-10-26
- Publisher
- Western Conifers Research Cooperative, Forest Response Program, EPA
- Units
- ARD , SAGU
- Keywords
- Air Pollution, AIRBIB, Botany, Conifers, Forestry, growth trends, growth variation, Pollutants, pollution impacts, Research, rmd, tree growth, Trees