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Title: Interactive effects of ozone and climate on tree growth and water use in a southern Appalachian forest in the USA

Abstract

Summary: {sm_bullet}Documentation of the degree and direction of effects of ozone on transpiration of canopies of mature forest trees is critically needed to model ozone effects on forest water use and growth in a warmer future climate. {sm_bullet}Patterns of sap flow in stems and soil moisture in the rooting zones of mature trees, coupled with late-season streamflow in three forested watersheds in east Tennessee, USA, were analyzed to determine relative influences of ozone and other climatic variables on canopy physiology and streamflow patterns.{sm_bullet}Statistically significant increases in whole-tree canopy conductance, depletion of soil moisture in the rooting zone, and reduced late-season streamflow in forested watersheds were detected in response to increasing ambient ozone levels. {sm_bullet}Short-term changes in canopy water use and empirically modeled streamflow patterns over a 23-yr observation period suggest that current ambient ozone exposures may exacerbate the frequency and level of negative effects of drought on forest growth and stream health.

Authors:
 [1];  [2];  [3];  [4]
  1. Oak Ridge National Laboratory (Retired)
  2. University of Calgary, ALberta, Canada
  3. ORNL
  4. USDA Forest Service
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
931387
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: New Phytologist; Journal Issue: 174
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; CANOPIES; CLIMATES; DROUGHTS; FORESTS; MOISTURE; OZONE; PHYSIOLOGY; SOILS; TENNESSEE; TRANSPIRATION; TREES; WATER USE; WATERSHEDS

Citation Formats

McLaughlin, Samuel B., Nosal, M., Wullschleger, Stan D, and Sun, G. Interactive effects of ozone and climate on tree growth and water use in a southern Appalachian forest in the USA. United States: N. p., 2007. Web. doi:10.1111/j.1469-8137.2007.01970.x.
McLaughlin, Samuel B., Nosal, M., Wullschleger, Stan D, & Sun, G. Interactive effects of ozone and climate on tree growth and water use in a southern Appalachian forest in the USA. United States. doi:10.1111/j.1469-8137.2007.01970.x.
McLaughlin, Samuel B., Nosal, M., Wullschleger, Stan D, and Sun, G. Mon . "Interactive effects of ozone and climate on tree growth and water use in a southern Appalachian forest in the USA". United States. doi:10.1111/j.1469-8137.2007.01970.x.
@article{osti_931387,
title = {Interactive effects of ozone and climate on tree growth and water use in a southern Appalachian forest in the USA},
author = {McLaughlin, Samuel B. and Nosal, M. and Wullschleger, Stan D and Sun, G.},
abstractNote = {Summary: {sm_bullet}Documentation of the degree and direction of effects of ozone on transpiration of canopies of mature forest trees is critically needed to model ozone effects on forest water use and growth in a warmer future climate. {sm_bullet}Patterns of sap flow in stems and soil moisture in the rooting zones of mature trees, coupled with late-season streamflow in three forested watersheds in east Tennessee, USA, were analyzed to determine relative influences of ozone and other climatic variables on canopy physiology and streamflow patterns.{sm_bullet}Statistically significant increases in whole-tree canopy conductance, depletion of soil moisture in the rooting zone, and reduced late-season streamflow in forested watersheds were detected in response to increasing ambient ozone levels. {sm_bullet}Short-term changes in canopy water use and empirically modeled streamflow patterns over a 23-yr observation period suggest that current ambient ozone exposures may exacerbate the frequency and level of negative effects of drought on forest growth and stream health.},
doi = {10.1111/j.1469-8137.2007.01970.x},
journal = {New Phytologist},
number = 174,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}