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Title: Interannual variations in needle and sapwood traits of Pinus edulis branches under an experimental drought

In recent years, widespread forest mortality in response to drought has been documented worldwide (Allen, Breshears & McDowell 2015). An example of widespread and rapid increase in drought-induced mortality, or die-off, was observed for Pinus edulis Engelm. across the Southwestern USA in response to several years of reduced rainfall and high vapor pressure deficits (VPD) (Breshears et al. 2009; Allen et al. 2010; Williams et al. 2013). Although stomatal closure under drought has been hypothesized to increase mortality through carbon starvation (McDowell et al. 2008; Breshears et al. 2009), more evidences exist for mortality being caused by hydraulic failure (Plaut et al. 2012; McDowell et al. 2013; Sevanto et al. 2014; Garcia-Forner et al. 2016). Regardless of the mechanism of drought-induced decline, maintaining a positive supply of water to the foliage is critical for tree functioning and survival.
ORCiD logo [1] ;  [2] ; ORCiD logo [3] ;  [4] ;  [4] ;  [5] ;  [6] ; ORCiD logo [7] ;  [8] ;  [1]
  1. Columbia Univ., New York, NY (United States)
  2. Forest Research Center (INIA-CIFOR), Madrid (Spain); Lamont-Doherty Earth Observatory of Columbia Univ., Palisades, NY (United States); Swiss Federal Inst. of Technology, Zurich (Switzerland)
  3. Swiss Federal Inst. for Forest, Snow and Landscape Research WSL, Birmensdorf (Switzerland); Inst. for Environmental Sciences, Geneva (Switzerland)
  4. Lamont-Doherty Earth Observatory of Columbia Univ., Palisades, NY (United States)
  5. Ecole Polytechnique, Palaiseau (France)
  6. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  7. Aarhus Univ. (Denmark)
  8. Univ. of New Mexico, Albuquerque, NM (United States)
Publication Date:
Report Number(s):
Journal ID: ISSN 2045-7758; 830403000
Grant/Contract Number:
Published Article
Journal Name:
Ecology and Evolution
Additional Journal Information:
Journal Volume: 8; Journal Issue: 3; Journal ID: ISSN 2045-7758
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
Country of Publication:
United States
59 BASIC BIOLOGICAL SCIENCES; functional ratio; xylem; leaf area; stomatal conductance; Huber value; isohydricity
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1416235; OSTI ID: 1427902