B118
Trends in Forest Water Use Efficiency: Observations, Drivers, and Consequences
Session ID#: 81671
Session Description:
Recently-observed trends in forest water use efficiency (WUE), broadly defined as the ratio of photosynthetic carbon fixation to water lost via transpiration, have prompted inquiry into the underlying mechanisms. While elevated atmospheric CO2 appears to be an important driver, climate, atmospheric N and S deposition, and canopy developmental/successional processes have also been linked to changes in forest WUE. These changes have pivotal implications for surface fluxes of CO2, water vapor, and energy, as well as associated vegetation-climate feedbacks. In this session, we will explore WUE observations and drivers at scales ranging from leaves to whole landscapes, including consequences for forest ecosystem functions and services. We encourage studies employing a range of approaches for examining forest WUE, including leaf gas exchange, dendro-isotopes, eddy-covariance, catchment water balance, and remote sensing. Submissions that span forest types across the globe, and also various sub-disciplines (e.g. plant physiology, eco-hydrology, forest ecology, and modeling) are welcome.
Co-Organized:
Index Terms:
0426 Biosphere/atmosphere interactions [BIOGEOSCIENCES]
0495 Water/energy interactions [BIOGEOSCIENCES]
1813 Eco-hydrology [HYDROLOGY]
1818 Evapotranspiration [HYDROLOGY]
Primary Convener: Todd M Scanlon, University of Virginia, Charlottesville, VA, United States
Conveners: Jacob Malcomb, University of Virginia, Charlottesville, VA, United States, Matthew A Vadeboncoeur, University of New Hampshire, Durham, NH, United States and Justin Michael Mathias, West Virginia University, Morgantown, WV, United States
Primary Liaison: Todd M Scanlon, Univ Virginia, Charlottesville, VA, United States
Nonstationary Hydrologic Behavior in Forested Watersheds Is Mediated by Climate-Induced Changes in Growing Season Length and Subsequent Vegetation Growth (500149)
Taehee Hwang, Indiana University Bloomington, Department of Geography, Bloomington, IN, United States, Katherine Martin, North Carolina State University, Department of Forestry and Environmental Resources, Raleigh, NC, United States, James M Vose, United States Forest Service, Southern Research Station, Center for Integrated Forest Science, Raleigh, NC, United States, David N Wear, United States Forest Service, Southern Research Station, Raleigh, NC, United States, Brian Miles, University of North Carolina at Chapel Hill, Geography, Chapel Hill, NC, United States, Yuri Kim, University of North Carolina at Chapel Hill, Institute for the Environment, Chapel Hill, NC, United States and Lawrence E Band, University of Virginia, Engineering Systems and Environment, Charlottesville, VA, United States
Rainfall Drives Variation in Rates of Change in Intrinsic Water Use Efficiency of Tropical Forests (503432)
Mark A. Adams, Swinburne University of Technology, Hawthorn, VIC, Australia, Tarryn L. Turnbull, Swinburne University of Technology, Chemistry and Biotechnology, Hawthorn, Australia and Thomas N Buckley, University of California Davis, Plant Sciences, Davis, United States
Water Use Efficiency from ECOSTRESS: First Look (507582)
Savannah Cooley, NASA Jet Propulsion Laboratory, Pasadena, CA, United States, Joshua Fisher, Jet Propulsion Laboratory, Pasadena, CA, United States and Gregory Halverson, NASA Jet Propulsion Laboratory, Pasadena, United States
Comparing Water Use Efficiency of Oak Canopy in Arithmetic or Differential Expressions across Hour-to-Year Timescales (557021)
Siyan Ma, University of California Berkeley, Berkeley, CA, United States and Dennis D Baldocchi, University of California Berkeley, Department of Environmental Science, Policy, and Management, Berkeley, CA, United States
The change of seasonal rainfall distribution with future climate impacts evapotranspiration and water yield in a Mediterranean forest. (573956)
Serena Sirigu1, Roberto Corona1, Ram Oren2 and Nicola Montaldo3, (1)University of Cagliari, Cagliari, Italy, (2)Duke University, Durham, NC, United States, (3)ARRAY(0xe4d8888), Cagliari, Italy
Unexpected Decrease in Forest Water Use Efficiency: Legacy Impacts of Acid Deposition (577567)
Matthew Lanning, Indiana University Purdue University Indianapolis, Earth Sciences, Indianapolis, IN, United States, Lixin Wang, Indiana University Purdue University Indianapolis, Department of Earth Sciences, Indianapolis, IN, United States, Todd M Scanlon, Univ Virginia, Charlottesville, VA, United States, Matthew A Vadeboncoeur, University of New Hampshire, Durham, NH, United States, Mary B Adams, US Forest Service, Northern Research Station, Morgantown, WV, United States, Howard E Epstein, University of Virginia Main Campus, Environmental Sciences, Charlottesville, VA, United States, Daniel Druckenbrod, Rider University, Lawrenceville, NJ, United States, Jacob Malcomb, University of Virginia, Charlottesville, VA, United States and William Gilhooly III, Indiana University Purdue Univ, Earth Sciences, Indianapolis, IN, United States
Nonlinear increases in water-use efficiency near maximum height: their influence on inferred CO2 response (593546)
John Marshall, SLU Swedish University of Agricultural Sciences Umea, Umeå, Sweden, Giustino Tonon, Free University of Bozen-Bolzano, Bolzano, Italy, Roberto Tognetti, Ambiente e Alimenti Università degli Studi del Molise Via Francesco De Sanctis, Dipartimento di Agricoltura, Campobasso, Italy and Francesco Giammarchi, Free University of Bozen, Forest Ecology and Silviculture, Bozen, Italy
Site-Level Soil Moisture Controls Water-use Efficiency and Climate Response in Sugar Maple (600961)
Rachel Dietrich, University of Guelph, Guelph, ON, Canada, F. Wayne Bell, Ontario Forest Research Institute, Sault Ste Marie, ON, Canada and Madhur Anand, University of Guelph, School of Environmental Sciences, Guelph, ON, Canada
Atmospheric Deposition as a Control on Forest Productivity and Water Use Efficiency: Evidence from Whole-Watershed Nutrient Manipulation Experiments (608285)
Jacob Malcomb, University of Virginia, Charlottesville, VA, United States, Todd M Scanlon, Univ Virginia, Charlottesville, VA, United States, Howard E Epstein, University of Virginia Main Campus, Environmental Sciences, Charlottesville, VA, United States, Matthew A Vadeboncoeur, University of New Hampshire, Durham, NH, United States, Daniel Druckenbrod, Rider University, Lawrenceville, NJ, United States, Lixin Wang, Indiana University Purdue University Indianapolis, Department of Earth Sciences, Indianapolis, IN, United States and Matthew Lanning, Indiana University Purdue University Indianapolis, Earth Sciences, Indianapolis, IN, United States
