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231224s2016 xx |||||o 00| ||eng c |
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|a 10.1111/nph.13815
|2 doi
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|a pubmed24n0853.xml
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|a (NLM)26719951
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|a DE-627
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|a eng
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|a De Kauwe, Martin G
|e verfasserin
|4 aut
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|a A test of the 'one-point method' for estimating maximum carboxylation capacity from field-measured, light-saturated photosynthesis
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|c 2016
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 26.12.2016
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a ErratumIn: New Phytol. 2016 Nov;212(3):792. - PMID 27735073
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|a Citation Status MEDLINE
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|a © 2015 The Authors. New Phytologist © 2015 New Phytologist Trust.
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|a 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 r(2) 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 r(2) 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
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a A-Ci curve
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|a leaf respiration during the day (Rday)
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|a maximum carboxylation rate (Vcmax)
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|a net photosynthetic rate at saturating irradiance and at ambient atmospheric CO2 concentration (Asat)
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|a Carbon Dioxide
|2 NLM
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|a 142M471B3J
|2 NLM
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|a Lin, Yan-Shih
|e verfasserin
|4 aut
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|a Wright, Ian J
|e verfasserin
|4 aut
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|a Medlyn, Belinda E
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|a Crous, Kristine Y
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|4 aut
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|a Ellsworth, David S
|e verfasserin
|4 aut
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|a Maire, Vincent
|e verfasserin
|4 aut
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|a Prentice, I Colin
|e verfasserin
|4 aut
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|a Atkin, Owen K
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|a Rogers, Alistair
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|a Niinemets, Ülo
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|a Serbin, Shawn P
|e verfasserin
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|a Meir, Patrick
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|a Uddling, Johan
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|a Togashi, Henrique F
|e verfasserin
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|a Tarvainen, Lasse
|e verfasserin
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|a Weerasinghe, Lasantha K
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|a Evans, Bradley J
|e verfasserin
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|a Ishida, F Yoko
|e verfasserin
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|a Domingues, Tomas F
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 210(2016), 3 vom: 27. Mai, Seite 1130-44
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
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|g volume:210
|g year:2016
|g number:3
|g day:27
|g month:05
|g pages:1130-44
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|u http://dx.doi.org/10.1111/nph.13815
|3 Volltext
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