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231224s2014 xx |||||o 00| ||eng c |
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|a 10.1111/nph.12665
|2 doi
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|a pubmed24n0780.xml
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|a DE-627
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|e rakwb
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|a eng
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| 100 |
1 |
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|a Veresoglou, Stavros D
|e verfasserin
|4 aut
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| 245 |
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|a Exploring continental-scale stand health - N : P ratio relationships for European forests
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|c 2014
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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 03.11.2014
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|a Date Revised 23.04.2021
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2014 The Authors. New Phytologist © 2014 New Phytologist Trust.
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|a Understanding the relationship between nitrogen (N) availability and stand health in forest ecosystems is crucial, because a large proportion of European forests is subjected to N-deposition levels beyond their retention capacity. We used data from a long-term forest monitoring programme (ICP Forests) to test the relationship between an index of N availability, foliar nitrogen : phosphorus (N : P) ratios, tree defoliation and discoloration. We hypothesized a segmented response of stand health to N : P ratios and an improved model-fit after correcting for climatic covariates. In accordance with the hypothesis, we found a segmented response with a breakpoint for conifer defoliation at N : P ratios as low as 7.3. Inclusion of climatic variables improved the fit of the models, but there was significant collinearity with N : P. Increases in N availability appear, at least for conifers, to have a negative effect on tree health even under N-limiting conditions. Regulation of N-deposition levels is consequently as timely as ever. We propose that increases in tree defoliation, other than resulting in serious plant fitness issues, may represent early diagnostic symptoms of N-addition related imbalances
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Bayesian inference
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|a N : P ratios
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|a defoliation
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|a forest health
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|a nitrogen (N) deposition
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| 650 |
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|a plant stoichiometry
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| 650 |
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|a visual crown assessment
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|a Phosphorus
|2 NLM
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|a 27YLU75U4W
|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 |
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|a Peñuelas, Josep
|e verfasserin
|4 aut
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| 700 |
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|a Fischer, Richard
|e verfasserin
|4 aut
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| 700 |
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|a Rautio, Pasi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Sardans, Jordi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Merilä, Päivi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Tabakovic-Tosic, Mara
|e verfasserin
|4 aut
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| 700 |
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|a Rillig, Matthias C
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 202(2014), 2 vom: 04. Apr., Seite 422-430
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|x 1469-8137
|7 nnns
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| 773 |
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|g volume:202
|g year:2014
|g number:2
|g day:04
|g month:04
|g pages:422-430
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|u http://dx.doi.org/10.1111/nph.12665
|3 Volltext
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