, Volume 30, Issue 1, pp 153–174 | Cite as

Stomatal conductance and intrinsic water use efficiency in the drought year 2003: a case study of European beech

  • Rainer Hentschel
  • Robert Hommel
  • Werner Poschenrieder
  • Rüdiger Grote
  • Jutta Holst
  • Christian Biernath
  • Arthur Gessler
  • Eckart Priesack
Original Article
Part of the following topical collections:
  1. Drought Stress


Key message

Beech trees were able to cope with the drought of 2003. Harmful water shortage has been avoided by an effective stomatal closure while use of carbon storage pools may have prevented carbon starvation and growth reduction.


We applied hydrodynamic modeling together with a tree ring stable isotope approach to identify the physiological responses of beech trees to changing environmental conditions. The drought conditions of the extreme hot and dry summer in 2003 were hypothesized to significantly influence the radial growth of European beech mainly triggered by the stomatal response towards water scarcity leading, in turn, to a decline in carbon assimilation. The functional–structural single tree modeling approach applied, revealed in fact a strong limitation of water use and carbon gain during drought. However, tree ring width data did not show a clear drought response and no differentiation in radial growth during six subsequent years examined (2002–2007) has been observed. Using integrated results from mechanistic carbon–water balance simulations, tree ring carbon and oxygen isotope analysis and tree ring width measurements we postulate that the suggested drought-induced growth decline has been prevented by the remobilization of stored carbohydrates, an early onset in growth and the relatively late occurrence of the severe drought in 2003. Furthermore, we demonstrate that the stomatal response played a significant role in avoiding harmful water tension that would have caused xylem dysfunction. As a result of the combined investigation with physiological measurements (stable isotope approach) and hydrodynamic modeling of stomatal aperture, we could give insights into the physiological control of mature beech tree functioning under drought. We conclude that beech trees have been operating at their hydraulic limits and that the longer or repeated drought periods would have affected the growth considerably.


Fagus sylvatica Intrinsic water use efficiency Leaf physiology Stomatal conductance Carbon and oxygen stable isotopes Hydrodynamic modeling 



This study was conducted as part of the joint research project ‘The carbon and water balance and the development of beech dominated forests—Physiological and competitive mechanisms on different scale levels’ with funding from the German Research Foundation (DFG) to AG under contract numbers GE 1090/8-1 and 9-1.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Rainer Hentschel
    • 1
    • 2
  • Robert Hommel
    • 1
  • Werner Poschenrieder
    • 3
  • Rüdiger Grote
    • 4
  • Jutta Holst
    • 5
  • Christian Biernath
    • 2
  • Arthur Gessler
    • 1
    • 6
  • Eckart Priesack
    • 2
  1. 1.Institute for Landscape BiogeochemistryLeibniz Centre for Agricultural Landscape Research (ZALF)MünchebergGermany
  2. 2.Institute of Biochemical Plant PathologyHelmholtz Zentrum MünchenNeuherbergGermany
  3. 3.Chair of Forest Yield ScienceTechnische Universität MünchenFreisingGermany
  4. 4.Institute of Meteorology and Climate Research (IMK-IFU)Karlsruhe Institute of Technology (KIT)Garmisch-PatenkirchenGermany
  5. 5.Department of Physical Geography and Ecosystem Science, Institutionen för Naturgeografi och ekosystemvetenskap (INES)Lund UniversityLundSweden
  6. 6.Swiss Federal Research Institute WSLBirmensdorfSwitzerland

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