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231226s2022 xx |||||o 00| ||eng c |
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|a 10.1111/gcb.16306
|2 doi
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|a pubmed25n1140.xml
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|a (DE-627)NLM342352857
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|a (NLM)35713965
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Chen, Qiong
|e verfasserin
|4 aut
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| 245 |
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|a Elevational shifts in foliar-soil δ15 N in the Hengduan Mountains and different potential mechanisms
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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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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 16.08.2022
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|a Date Revised 26.09.2022
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2022 John Wiley & Sons Ltd.
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|a The natural abundance of stable nitrogen isotopes (δ15 N) provides insights into the N dynamics of terrestrial ecosystems, the determination of which is considered an effective approach for gaining a better understanding ecosystem N cycling. However, there is currently little information available regarding the patterns and mechanisms underlying the variation in foliar-soil δ15 N among mountain ecosystems. In this study, we examined the determinants of foliar-soil δ15 N in association with N transportation rates along an elevational gradient in the Hengduan Mountains. Despite the relatively high levels of available N produced from high N fixation and mineralization, we detected the lowest levels of foliar δ15 N at 3500 m a.s.l., reflecting the stronger vegetation N limitation at medium high elevations. The enhanced vegetation N limitation was driven by the combined effects of higher microbial immobilization and inherent plant dynamic (the shifts of δ15 N in vegetation preference, including vegetation community) with changing climate along the elevational gradient. Unexpectedly, we established that soil δ15 N was characterized by an undulating rise and uncoupled correlation with foliar δ15 N with increasing elevation, thereby indicating that litter input might not be a prominent driver of soil δ15 N. Conversely, soil nitrification and denitrification were found to make a more pronounced contribution to the pattern of soil δ15 N along the elevational gradient. Collectively, our results serve to highlight the importance of microbial immobilization in soil N dynamics and provide novel insights that will contribute to enhancing our understanding of N cycling as indicated by foliar-soil δ15 N along elevational gradients
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|a Journal Article
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4 |
|a altitude
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4 |
|a forestland
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| 650 |
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4 |
|a microbial assimilation
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| 650 |
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4 |
|a nitrogen cycle
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| 650 |
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4 |
|a stable isotope
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| 650 |
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|a Nitrogen Isotopes
|2 NLM
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| 650 |
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|a Soil
|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 Chen, Ji
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Andersen, Mathias Neumann
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Cheng, Xiaoli
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Global change biology
|d 1999
|g 28(2022), 18 vom: 01. Sept., Seite 5480-5491
|w (DE-627)NLM098239996
|x 1365-2486
|7 nnas
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| 773 |
1 |
8 |
|g volume:28
|g year:2022
|g number:18
|g day:01
|g month:09
|g pages:5480-5491
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|u http://dx.doi.org/10.1111/gcb.16306
|3 Volltext
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