Growth response of young slash pine trees to simulated acid rain and ozone stress
Document Type
Article
Publication Date
1-1-1992
Abstract
Four half-sib families of Pinus elliottii were planted in large open-top chambers and exposed 28 months to factorial combinations of three rain acidities (pH 3.3, 4.3, and 5.3) and four concentrations of ozone (subambient produced with carbon filtration, ambient, two times ambient, and three times ambient). Among the growth variables, only volume increment showed a consistent year to year response to acid rain and ozone. The acid rain × ozone interactions was significant for volume increment each year and was the result of trees in the two times ambient ozone level having greater sensitivity to rain acidity. Both acid rain and ozone significantly affected mean unit leaf rate, but this effect weakened with time, suggesting some degree of physiological acclimation. Increasing rain acidity significantly increased mean leaf area only during the first growth period. Ozone significantly affected mean unit leaf rate, but this effect weakened with time, suggesting some degree of physiological acclimation. Increasing rain acidity significantly increased mean leaf area only during the first growth period. Ozone significantly decreased mean leaf area all three growth periods, with the effect intensifying each year. Complex family interactions with acid rain and ozone masked any clear family sensitivities to these pollutants. -from Authors
Publication Source (Journal or Book title)
Canadian Journal of Forest Research
First Page
839
Last Page
848
Recommended Citation
Dean, T., & Johnson, J. (1992). Growth response of young slash pine trees to simulated acid rain and ozone stress. Canadian Journal of Forest Research, 22 (6), 839-848. https://doi.org/10.1139/x92-113