Back
Full-text
Journal article

Historical changes in the stomatal limitation of photosynthesis: empirical support for an optimality principle.

  • Lavergne A Department of Life Sciences, Imperial College London, Silwood Park Campus, Buckhurst Road, Ascot, SL5 7PY, UK.
  • Voelker S Department of Environmental and Forest Biology, SUNY College of Environmental Science and Forestry, Syracuse, NY, 13210, USA.
  • Csank A Department of Geography, University of Nevada-Reno, 1664 N. Virginia St, Reno, NV, 89557, USA.
  • Graven H Department of Physics, Imperial College London, Exhibition Road, London, SW7 2AZ, UK.
  • de Boer HJ Department of Environmental Sciences, Utrecht University, 3584 CB, Utrecht, the Netherlands.
  • Daux V Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-UVSQ, 91191, Gif-sur-Yvette, France.
  • Robertson I Department of Geography, Swansea University, Swansea, SA2 8PP, UK.
  • Dorado-Liñán I Forest Genetics and Ecophysiology Research Group, Technical University of Madrid, Madrid, 28040, Spain.
  • Martínez-Sancho E Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Zürcherstrasse 111, Birmensdorf, 8903, Switzerland.
  • Battipaglia G Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania "L. Vanvitelli", Via Vivaldi, 81100, Caserta, Italy.
  • Bloomfield KJ Department of Life Sciences, Imperial College London, Silwood Park Campus, Buckhurst Road, Ascot, SL5 7PY, UK.
  • Still CJ Department of Forest Ecosystems & Society, Oregon State University, Corvallis, OR, 97331-5704, USA.
  • Meinzer FC USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR, 97331-8550, USA.
  • Dawson TE Department of Integrative Biology, University of California - Berkeley, Berkeley, CA, 94720-3200, USA.
  • Julio Camarero J Instituto Pirenaico de Ecología (IPE-CSIC), E-50192, Zaragoza, Spain.
  • Clisby R Department of Geography, Swansea University, Swansea, SA2 8PP, UK.
  • Fang Y Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China.
  • Menzel A Ecoclimatology, Department of Ecology and Ecosystem Management, Technical University of Munich, 85354, Freising, Germany.
  • Keen RM Division of Biology, Kansas State University, Manhattan, KS, 66506, USA.
  • Roden JS Department of Biology, Southern Oregon University, Ashland, OR, 97520, USA.
  • Prentice IC Department of Life Sciences, Imperial College London, Silwood Park Campus, Buckhurst Road, Ascot, SL5 7PY, UK.
Show more…
  • 2019-11-08
Published in:
  • The New phytologist. - 2020
leaf-internal CO2 concentration
least-cost hypothesis
optimality
stable carbon isotopes
tree rings
water-use efficiency
English The ratio of leaf internal (ci ) to ambient (ca ) partial pressure of CO2 , defined here as χ, is an index of adjustments in both leaf stomatal conductance and photosynthetic rate to environmental conditions. Measurements and proxies of this ratio can be used to constrain vegetation model uncertainties for predicting terrestrial carbon uptake and water use. We test a theory based on the least-cost optimality hypothesis for modelling historical changes in χ over the 1951-2014 period, across different tree species and environmental conditions, as reconstructed from stable carbon isotopic measurements across a global network of 103 absolutely dated tree-ring chronologies. The theory predicts optimal χ as a function of air temperature, vapour pressure deficit, ca and atmospheric pressure. The theoretical model predicts 39% of the variance in χ values across sites and years, but underestimates the intersite variability in the reconstructed χ trends, resulting in only 8% of the variance in χ trends across years explained by the model. Overall, our results support theoretical predictions that variations in χ are tightly regulated by the four environmental drivers. They also suggest that explicitly accounting for the effects of plant-available soil water and other site-specific characteristics might improve the predictions.
Language
  • English
Open access status
green
Identifiers
Persistent URL
https://sonar.ch/global/documents/93260
Statistics
Document views: 44 File downloads:
  • Full-text: 0