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A test of the ‘one-...
A test of the ‘one-point method’ for estimating maximum carboxylation capacity from field-measured, light-saturated photosynthesis
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De Kauwe, M. G. (author)
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Lin, Y.-S. (author)
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Wright, I. J. (author)
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Medlyn, B. E. (author)
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Crous, K. Y. (author)
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Ellsworth, D. S. (author)
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Maire, V. (author)
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Prentice, I. C. (author)
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Atkin, O. K. (author)
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Rogers, A. (author)
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Niinemets, U. (author)
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Serbin, S. P. (author)
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Meir, P. (author)
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- Uddling, Johan, 1972 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences
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Togashi, H. F. (author)
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- Tarvainen, Lasse, 1977 (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management
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Weerasinghe, L. K. (author)
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Evans, B. J. (author)
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Ishida, F. Y. (author)
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Domingues, T. F. (author)
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(creator_code:org_t)
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- 2015-12-31
- 2016
- English.
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In: New Phytologist. - : Wiley. - 0028-646X .- 1469-8137. ; 210:3, s. 1130-1144
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Abstract
Subject headings
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- Simulations of photosynthesis by terrestrial biosphere models typically need a specification of the maximum carboxylation rate (Vcmax). Estimating this parameter using A–Ci curves (net photosynthesis, A, vs intercellular CO2 concentration, Ci) is laborious, which limits availability of Vcmax data. However, many multispecies field datasets include net photosynthetic rate at saturating irradiance and at ambient atmospheric CO2 concentration (Asat) measurements, from which Vcmax can be extracted using a ‘one-point method’. We used a global dataset of A–Ci curves (564 species from 46 field sites, covering a range of plant functional types) to test the validity of an alternative approach to estimate Vcmax from Asat via this ‘one-point method’. If leaf respiration during the day (Rday) is known exactly, Vcmax can be estimated with an r2 value of 0.98 and a root-mean-squared error (RMSE) of 8.19 μmol m−2 s−1. However, Rday typically must be estimated. Estimating Rday as 1.5% of Vcmax, we found that Vcmax could be estimated with an r2 of 0.95 and an RMSE of 17.1 μmol m−2 s−1. The one-point method provides a robust means to expand current databases of field-measured Vcmax, giving new potential to improve vegetation models and quantify the environmental drivers of Vcmax variation.
Subject headings
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Botanik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Botany (hsv//eng)
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Skogsvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Forest Science (hsv//eng)
Keyword
- A–Ci curve
- Maximum carboxylation rate (Vcmax)
- Photosynthesis
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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De Kauwe, M. G.
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Lin, Y.-S.
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Wright, I. J.
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Medlyn, B. E.
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Crous, K. Y.
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Ellsworth, D. S.
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show more...
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Maire, V.
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Prentice, I. C.
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Atkin, O. K.
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Rogers, A.
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Niinemets, U.
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Serbin, S. P.
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Meir, P.
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Uddling, Johan, ...
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Togashi, H. F.
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Tarvainen, Lasse ...
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Weerasinghe, L. ...
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Evans, B. J.
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Ishida, F. Y.
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Domingues, T. F.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Ecology
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Botany
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- AGRICULTURAL SCIENCES
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AGRICULTURAL SCI ...
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and Agriculture Fore ...
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and Forest Science
- Articles in the publication
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New Phytologist
- By the university
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University of Gothenburg
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Swedish University of Agricultural Sciences