Woody plants optimise stomatal behaviour relative to hydraulic risk.

Autor: Anderegg WRL; Department of Biology, University of Utah, Salt Lake City, UT, 84112, USA., Wolf A; Arable Labs, Princeton, NJ, 08544, USA., Arango-Velez A; Connecticut Agricultural Experiment Station, New Haven, CT, 06504, USA., Choat B; Hawkesbury Institute for the Environment, Western Sydney University, Penrith, 2751, NSW, Australia., Chmura DJ; Institute of Dendrology, Polish Academy of Sciences, ul. Parkowa 5, 62-035, Kórnik, Poland., Jansen S; Institute of Systematic Botany and Ecology, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany., Kolb T; School of Forestry, Northern Arizona University, Flagstaff, AZ, 86011, USA., Li S; Institute of Systematic Botany and Ecology, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany.; Department of Wood Anatomy and Utilization, Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, China., Meinzer FC; USDA Forest Service, Pacific Northwest Research Station, Corvallis, OR, 97331, USA., Pita P; Technical University of Madrid, Madrid, Spain., Resco de Dios V; Department of Crop and Forest Sciences and Agrotecnio Center, Universitat de Lleida, Lleida, 25198, Spain., Sperry JS; Department of Biology, University of Utah, Salt Lake City, UT, 84112, USA., Wolfe BT; Smithsonian Tropical Research Institute, Balboa, Panama., Pacala S; Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, 08544, USA.
Jazyk: angličtina
Zdroj: Ecology letters [Ecol Lett] 2018 Jul; Vol. 21 (7), pp. 968-977. Date of Electronic Publication: 2018 Apr 23.
DOI: 10.1111/ele.12962
Abstrakt: Stomatal response to environmental conditions forms the backbone of all ecosystem and carbon cycle models, but is largely based on empirical relationships. Evolutionary theories of stomatal behaviour are critical for guarding against prediction errors of empirical models under future climates. Longstanding theory holds that stomata maximise fitness by acting to maintain constant marginal water use efficiency over a given time horizon, but a recent evolutionary theory proposes that stomata instead maximise carbon gain minus carbon costs/risk of hydraulic damage. Using data from 34 species that span global forest biomes, we find that the recent carbon-maximisation optimisation theory is widely supported, revealing that the evolution of stomatal regulation has not been primarily driven by attainment of constant marginal water use efficiency. Optimal control of stomata to manage hydraulic risk is likely to have significant consequences for ecosystem fluxes during drought, which is critical given projected intensification of the global hydrological cycle.
(© 2018 The Authors. Ecology Letters published by CNRS and John Wiley & Sons Ltd.)
Databáze: MEDLINE
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