1. Historical changes in the stomatal limitation of photosynthesis: empirical support for an optimality principle
- Author
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Annette Menzel, Yunting Fang, Rory Clisby, I. Colin Prentice, Elisabet Martínez-Sancho, Steve Voelker, John S. Roden, Adam Z. Csank, Christopher J. Still, J. Julio Camarero, Iain Robertson, Heather Graven, Rachel Keen, Valérie Daux, Hugo J. de Boer, Todd E. Dawson, Frederick C. Meinzer, Keith J. Bloomfield, Isabel Dorado-Liñán, Aliénor Lavergne, Giovanna Battipaglia, AXA Research Fund, The Royal Society, Commission of the European Communities, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Géochrononologie Traceurs Archéométrie (GEOTRAC), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Glaces et Continents, Climats et Isotopes Stables (GLACCIOS), Geography, Swansea University, Centro de Investigacion Forestal (INIA-CIFOR), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria = National Institute for Agricultural and Food Research and Technology (INIA), Department of Environmental, Biological and Pharmaceutical Sciences and Technologies (DiSTABiF), University of Naples Federico II = Università degli studi di Napoli Federico II, Technische Universität Munchen - Université Technique de Munich [Munich, Allemagne] (TUM), Max-Planck-Institut für Biogeochemie (MPI-BGC), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), University of Naples Federico II, Technical University of Munich (TUM), Lavergne, A., Voelker, S., Csank, A., Graven, H., de Boer, H. J., Daux, V., Robertson, I., Dorado-Linan, I., Martinez-Sancho, E., Battipaglia, G., Bloomfield, K. J., Still, C. J., Meinzer, F. C., Dawson, T. E., Julio Camarero, J., Clisby, R., Fang, Y., Menzel, A., Keen, R. M., Roden, J. S., and Prentice, I. C.
- Subjects
0106 biological sciences ,0301 basic medicine ,Physiology ,Vapour Pressure Deficit ,Plant Science ,Atmospheric sciences ,01 natural sciences ,Panoply ,TREE-RINGS ,water-use efficiency ,Photosynthesis ,ComputingMilieux_MISCELLANEOUS ,leaf-internal CO2 concentration ,Carbon Isotopes ,Atmospheric pressure ,TEMPERATURE RESPONSE ,Variance (accounting) ,Vegetation ,stable carbon isotope ,least-cost hypothesi ,LEAF NITROGEN ,Life Sciences & Biomedicine ,concentration ,Stomatal conductance ,[SDE.MCG]Environmental Sciences/Global Changes ,MESOPHYLL CONDUCTANCE ,Plant Biology & Botany ,CARBON-ISOTOPE DISCRIMINATION ,stable carbon isotopes ,least-cost hypothesis ,03 medical and health sciences ,07 Agricultural and Veterinary Sciences ,Water-use efficiency ,ATMOSPHERIC CO2 ,PLANT ,Science & Technology ,Plant Sciences ,leaf-internal CO ,Water ,tree ring ,15. Life on land ,06 Biological Sciences ,Carbon Dioxide ,MODEL ,Plant Leaves ,optimality ,tree rings ,030104 developmental biology ,13. Climate action ,Soil water ,Environmental science ,[SDV.EE.BIO]Life Sciences [q-bio]/Ecology, environment/Bioclimatology ,ELEVATED CO2 ,Water use ,010606 plant biology & botany - Abstract
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.
- Published
- 2019