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231225s2022 xx |||||o 00| ||eng c |
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|a 10.1111/gcb.15969
|2 doi
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|a pubmed24n1108.xml
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|a (DE-627)NLM332645347
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|a (NLM)34726326
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|a DE-627
|b ger
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|e rakwb
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|a eng
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|a He, Mei
|e verfasserin
|4 aut
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|a Depth-dependent drivers of soil microbial necromass carbon across Tibetan alpine grasslands
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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 23.02.2022
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|a Date Revised 23.02.2022
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2021 John Wiley & Sons Ltd.
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|a Microbial necromass carbon (C) has been considered an important contributor to persistent soil C pool. However, there still lacks large-scale systematic observations on microbial necromass C in different soil layers, particularly for alpine ecosystems. Besides, it is still unclear whether the relative importance of biotic and abiotic variables such as plant C input and mineral properties in regulating microbial necromass C would change with soil depth. Based on the combination of large-scale sampling along a ~2200 km transect across Tibetan alpine grasslands and biomarker analysis, together with a global data synthesis across grassland ecosystems, we observed a relatively low proportion of microbial-derived C in Tibetan alpine grasslands compared to global grasslands (topsoil: 45.4% vs. 58.1%; subsoil: 41.7% vs. 53.7%). We also found that major determinants of microbial necromass C depended on soil depth. In topsoil, both plant C input and mineral protection exerted dominant effects on microbial necromass C. However, in subsoil, the physico-chemical protection provided by soil clay particles, iron-aluminum oxides, and exchangeable calcium dominantly facilitated the preservation of microbial necromass C. The differential drivers over microbial necromass C between soil depths should be considered in Earth system models for accurately forecasting soil C dynamics and its potential feedback to global warming
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|a Journal Article
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|a carbon cycle
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|a carbon-climate feedback
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|a deep soil
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|a microbial residue
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|a mineral protection
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|a plant carbon input
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|a Soil
|2 NLM
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|a Carbon
|2 NLM
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|a 7440-44-0
|2 NLM
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700 |
1 |
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|a Fang, Kai
|e verfasserin
|4 aut
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1 |
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|a Chen, Leiyi
|e verfasserin
|4 aut
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700 |
1 |
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|a Feng, Xuehui
|e verfasserin
|4 aut
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700 |
1 |
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|a Qin, Shuqi
|e verfasserin
|4 aut
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700 |
1 |
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|a Kou, Dan
|e verfasserin
|4 aut
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1 |
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|a He, Hongbo
|e verfasserin
|4 aut
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1 |
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|a Liang, Chao
|e verfasserin
|4 aut
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700 |
1 |
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|a Yang, Yuanhe
|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), 3 vom: 04. Feb., Seite 936-949
|w (DE-627)NLM098239996
|x 1365-2486
|7 nnns
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|g volume:28
|g year:2022
|g number:3
|g day:04
|g month:02
|g pages:936-949
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|u http://dx.doi.org/10.1111/gcb.15969
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