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231226s2022 xx |||||o 00| ||eng c |
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|a 10.1111/nph.18076
|2 doi
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|a pubmed24n1524.xml
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|a (NLM)35297050
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|a DE-627
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|e rakwb
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|a eng
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|a Dong, Ning
|e verfasserin
|4 aut
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|a Rising CO2 and warming reduce global canopy demand for nitrogen
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|c 2022
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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 03.08.2022
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|a Date Revised 05.09.2024
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|a published: Print-Electronic
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|a CommentIn: New Phytol. 2022 Sep;235(5):1683-1685. doi: 10.1111/nph.18354. - PMID 35841595
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|a Citation Status MEDLINE
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|a © 2022 The Authors. New Phytologist © 2022 New Phytologist Foundation.
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|a Nitrogen (N) limitation has been considered as a constraint on terrestrial carbon uptake in response to rising CO2 and climate change. By extension, it has been suggested that declining carboxylation capacity (Vcmax ) and leaf N content in enhanced-CO2 experiments and satellite records signify increasing N limitation of primary production. We predicted Vcmax using the coordination hypothesis and estimated changes in leaf-level photosynthetic N for 1982-2016 assuming proportionality with leaf-level Vcmax at 25°C. The whole-canopy photosynthetic N was derived using satellite-based leaf area index (LAI) data and an empirical extinction coefficient for Vcmax , and converted to annual N demand using estimated leaf turnover times. The predicted spatial pattern of Vcmax shares key features with an independent reconstruction from remotely sensed leaf chlorophyll content. Predicted leaf photosynthetic N declined by 0.27% yr-1 , while observed leaf (total) N declined by 0.2-0.25% yr-1 . Predicted global canopy N (and N demand) declined from 1996 onwards, despite increasing LAI. Leaf-level responses to rising CO2 , and to a lesser extent temperature, may have reduced the canopy requirement for N by more than rising LAI has increased it. This finding provides an alternative explanation for declining leaf N that does not depend on increasing N limitation
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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 CO2 fertilization
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|a acclimation
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|a coordination hypothesis
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|a leaf chlorophyll
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|a nitrogen cycle
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|a nitrogen demand
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|a photosynthetic capacity
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|a remote sensing
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|a Chlorophyll
|2 NLM
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|a 1406-65-1
|2 NLM
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|a Carbon Dioxide
|2 NLM
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|a 142M471B3J
|2 NLM
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| 650 |
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|a Nitrogen
|2 NLM
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| 650 |
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|a N762921K75
|2 NLM
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| 700 |
1 |
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|a Wright, Ian J
|e verfasserin
|4 aut
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|a Chen, Jing M
|e verfasserin
|4 aut
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| 700 |
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|a Luo, Xiangzhong
|e verfasserin
|4 aut
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|a Wang, Han
|e verfasserin
|4 aut
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|a Keenan, Trevor F
|e verfasserin
|4 aut
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|a Smith, Nicholas G
|e verfasserin
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|a Prentice, Iain Colin
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 235(2022), 5 vom: 01. Sept., Seite 1692-1700
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
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|g volume:235
|g year:2022
|g number:5
|g day:01
|g month:09
|g pages:1692-1700
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|u http://dx.doi.org/10.1111/nph.18076
|3 Volltext
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