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231224s2015 xx |||||o 00| ||eng c |
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|a 10.1111/nph.13547
|2 doi
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|a pubmed24n0835.xml
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|a (NLM)26147489
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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1 |
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|a Meyerholt, Johannes
|e verfasserin
|4 aut
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|a The role of stoichiometric flexibility in modelling forest ecosystem responses to nitrogen fertilization
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|c 2015
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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
|b cr
|2 rdacarrier
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|a Date Completed 06.09.2016
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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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 The response of the forest carbon (C) balance to changes in nitrogen (N) deposition is uncertain, partly owing to diverging representations of N cycle processes in dynamic global vegetation models (DGVMs). Here, we examined how different assumptions about the degree of flexibility of the ecosystem's C : N ratios contribute to this uncertainty, and which of these assumptions best correspond to the available data. We applied these assumptions within the framework of a DGVM and compared the results to responses in net primary productivity (NPP), leaf N concentration, and ecosystem N partitioning, observed at 22 forest N fertilization experiments. Employing flexible ecosystem pool C : N ratios generally resulted in the most convincing model-data agreement with respect to production and foliar N responses. An intermediate degree of stoichiometric flexibility in vegetation, where wood C : N ratio changes were decoupled from leaf and root C : N ratio changes, led to consistent simulation of production and N cycle responses to N addition. Assuming fixed C : N ratios or scaling leaf N concentration changes to other tissues, commonly assumed by DGVMs, was not supported by reported data. Between the tested assumptions, the simulated changes in ecosystem C storage relative to changes in C assimilation varied by up to 20%
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a carbon-nitrogen cycle coupling
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| 650 |
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4 |
|a ecosystem modelling
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| 650 |
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4 |
|a fertilization
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| 650 |
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4 |
|a forest carbon balance
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| 650 |
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4 |
|a nitrogen cycle
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| 650 |
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4 |
|a plant stoichiometry
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| 650 |
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|a Fertilizers
|2 NLM
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| 650 |
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7 |
|a Soil
|2 NLM
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| 650 |
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|a Carbon
|2 NLM
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| 650 |
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|a 7440-44-0
|2 NLM
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| 650 |
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|a Nitrogen
|2 NLM
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| 650 |
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7 |
|a N762921K75
|2 NLM
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| 700 |
1 |
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|a Zaehle, Sönke
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t The New phytologist
|d 1979
|g 208(2015), 4 vom: 27. Dez., Seite 1042-55
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
1 |
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|g volume:208
|g year:2015
|g number:4
|g day:27
|g month:12
|g pages:1042-55
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|u http://dx.doi.org/10.1111/nph.13547
|3 Volltext
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