OOS 41: Plant Water Relations Under Increasing VPD: Linkages and Gaps from Soil to Atmosphere

Session Organizer(s)

• Jeffrey Warren

  Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory
  Oak Ridge, TN, USA

Moderator(s)

• Jennifer Peters

  Environmental Science Division and Climate Change Science Institute, Oak Ridge National Laboratory
  Oak Ridge, TN, USA

As the climate continues to warm there is an increasing atmospheric demand for water, which is mediated through surface evaporation and plant transpiration. This increased atmospheric demand, measured by vapor pressure deficit (VPD) can lead to plant water stress and thus has profound implications for plant water use, hydraulic strategies, morphology and net carbon uptake. Above and belowground hydraulic tradeoffs may mitigate against the increased stress, although functional plasticity may be limited for specific species leading to altered ecosystem composition and function. This session will span across scales, from mechanistic processes related to water extraction, plant hydraulics, ecohydrology, landscape level modeling and linkages to management decisions.

Presentations:

• ON DEMAND

  Disentangling the impacts of rising temperature and vapor pressure deficit on tree hydraulic functions and carbon dynamics
  

  Presenting Author: Leonie Schönbeck – School of Architecture, Civil and Environmental Engineering ENAC, École Polytechnique Fédérale de Lausanne EPFL
• ON DEMAND

  Dynamic responses of ecosystem hydraulics and gas exchange to water supply and demand
  

  Presenting Author: Jeffrey D. Wood – University of Missouri
• ON DEMAND

  Plant response to VPD as a key trait for urban microclimate regulation
  

  Presenting Author: Simone Fatichi – Department of Civil and Environmental Engineering, National University of Singapore
• ON DEMAND

  Systemic effects of elevated VPD on plants: Implications for predicting plant adaptation to climate change
  

  Presenting Author: Danielle A. Way – Department of Biology, The University of Western Ontario
• ON DEMAND

  Temporal variation of stomatal sensitivity to VPD in western riparian trees
  

  Presenting Author: Jessica S. Guo – College of Agriculture and Life Sciences, University of Arizona