Interactive effects of ozone and climate on tree growth and water use in a southern Appalachian forest in the USA
McLaughlin SB, Nosal M, Wullschleger SD, Sun G. 2007. Interactive effects of ozone and climate on tree growth and water use in a southern Appalachian forest in the USA. New Phytologist. 174:109-124
Researchers examined hourly to seasonal patterns of stem growth and sap flow velocity in mature trees at three forested sites, Look Rock, Twin Creeks, and Oak Ridge, in eastern Tennessee near the Great Smoky Mountains. The objective was to evaluate the effects of variations in ambient ozone exposure and climate on patterns of stem growth and water use. Ambient ozone caused a periodic slowdown in seasonal growth patterns that was attributable in part to amplification of diurnal patterns of water loss in tree stems. Results showed statistically significant increases in ozone-induced daily sap flow and led to seasonal losses in stem growth of 30-50% for most species in a high ozone year.
- Type
- Journal Article
- Authors
- McLaughlin, S; Nosal, M; Wullschleger, S; Sun, G
- Units
- ARD , GRSM
- Keywords
- AIRBIB, ARD_Park-Air-Info_Collection, Climate, Forests, Growth, GRSM-00102, Models, Ozone, Water Use