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231226s2023 xx |||||o 00| ||eng c |
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|a 10.1111/nph.18901
|2 doi
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|a pubmed24n1182.xml
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|a (NLM)36960539
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Lamour, Julien
|e verfasserin
|4 aut
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| 245 |
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|a The effect of the vertical gradients of photosynthetic parameters on the CO2 assimilation and transpiration of a Panamanian tropical forest
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|c 2023
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 19.05.2023
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|a Date Revised 21.05.2023
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2023 The Authors New Phytologist © 2023 New Phytologist Foundation This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.
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|a Terrestrial biosphere models (TBMs) include the representation of vertical gradients in leaf traits associated with modeling photosynthesis, respiration, and stomatal conductance. However, model assumptions associated with these gradients have not been tested in complex tropical forest canopies. We compared TBM representation of the vertical gradients of key leaf traits with measurements made in a tropical forest in Panama and then quantified the impact of the observed gradients on simulated canopy-scale CO2 and water fluxes. Comparison between observed and TBM trait gradients showed divergence that impacted canopy-scale simulations of water vapor and CO2 exchange. Notably, the ratio between the dark respiration rate and the maximum carboxylation rate was lower near the ground than at the top-of-canopy, leaf-level water-use efficiency was markedly higher at the top-of-canopy, and the decrease in maximum carboxylation rate from the top-of-canopy to the ground was less than TBM assumptions. The representation of the gradients of leaf traits in TBMs is typically derived from measurements made within-individual plants, or, for some traits, assumed constant due to a lack of experimental data. Our work shows that these assumptions are not representative of the trait gradients observed in species-rich, complex tropical forests
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|a Journal Article
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a canopy height
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| 650 |
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|a climate change
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| 650 |
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|a leaf area index
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| 650 |
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|a leaf traits
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| 650 |
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|a photosynthesis
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| 650 |
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|a stomatal conductance
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| 650 |
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|a vertical gradients
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| 650 |
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|a water-use efficiency
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|a Carbon Dioxide
|2 NLM
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|a 142M471B3J
|2 NLM
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| 700 |
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|a Davidson, Kenneth J
|e verfasserin
|4 aut
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|a Ely, Kim S
|e verfasserin
|4 aut
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| 700 |
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|a Le Moguédec, Gilles
|e verfasserin
|4 aut
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| 700 |
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|a Anderson, Jeremiah A
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Qianyu
|e verfasserin
|4 aut
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| 700 |
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|a Calderón, Osvaldo
|e verfasserin
|4 aut
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| 700 |
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|a Koven, Charles D
|e verfasserin
|4 aut
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| 700 |
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|a Wright, S Joseph
|e verfasserin
|4 aut
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|a Walker, Anthony P
|e verfasserin
|4 aut
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|a Serbin, Shawn P
|e verfasserin
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|a Rogers, Alistair
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 238(2023), 6 vom: 01. Juni, Seite 2345-2362
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
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|g volume:238
|g year:2023
|g number:6
|g day:01
|g month:06
|g pages:2345-2362
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|u http://dx.doi.org/10.1111/nph.18901
|3 Volltext
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