Drivers of foliar 15 N trends in southern China over the last century

Drivers of foliar 15 N trends in southern China over the last century

© 2022 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 28(2022), 18 vom: 01. Sept., Seite 5441-5452
1. Verfasser: Tang, Songbo (VerfasserIn)
Weitere Verfasser: Liu, Jianfeng, Gilliam, Frank S, Hietz, Peter, Wang, Zhiheng, Lu, Xiankai, Zeng, Feiyan, Wen, Dazhi, Hou, Enqing, Lai, Yuan, Fang, Yunting, Tu, Ying, Xi, Dan, Huang, Zhiqun, Zhang, Dianxiang, Wang, Rong, Kuang, Yuanwen
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article atmospheric CO2global change foliar nitrogen concentrations foliar nitrogen isotopes nitrogen availability nitrogen deposition Nitrogen Isotopes Carbon Dioxide 142M471B3J Nitrogen N762921K75
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520 |a Foliar stable nitrogen (N) isotopes (δ15 N) generally reflect N availability to plants and have been used to infer about changes thereof. However, previous studies of temporal trends in foliar δ15 N have ignored the influence of confounding factors, leading to uncertainties on its indication to N availability. In this study, we measured foliar δ15 N of 1811 herbarium specimens from 12 plant species collected in southern China forests from 1920 to 2010. We explored how changes in atmospheric CO2 , N deposition and global warming have affected foliar δ15 N and N concentrations ([N]) and identified whether N availability decreased in southern China. Across all species, foliar δ15 N significantly decreased by 0.82‰ over the study period. However, foliar [N] did not decrease significantly, implying N homeostasis in forest trees in the region. The spatiotemporal patterns of foliar δ15 N were explained by mean annual temperature (MAT), atmospheric CO2 ( P CO 2 ), atmospheric N deposition, and foliar [N]. The spatiotemporal trends of foliar [N] were explained by MAT, temperature seasonality, P CO 2 , and N deposition. N deposition within the rates from 5.3 to 12.6 kg N ha-1  year-1 substantially contributed to the temporal decline in foliar δ15 N. The decline in foliar δ15 N was not accompanied by changes in foliar [N] and therefore does not necessarily reflect a decline in N availability. This is important to understand changes in N availability, which is essential to validate and parameterize biogeochemical cycles of N 
650 4 |a Journal Article 
650 4 |a atmospheric CO2global change 
650 4 |a foliar nitrogen concentrations 
650 4 |a foliar nitrogen isotopes 
650 4 |a nitrogen availability 
650 4 |a nitrogen deposition 
650 7 |a Nitrogen Isotopes  |2 NLM 
650 7 |a Carbon Dioxide  |2 NLM 
650 7 |a 142M471B3J  |2 NLM 
650 7 |a Nitrogen  |2 NLM 
650 7 |a N762921K75  |2 NLM 
700 1 |a Liu, Jianfeng  |e verfasserin  |4 aut 
700 1 |a Gilliam, Frank S  |e verfasserin  |4 aut 
700 1 |a Hietz, Peter  |e verfasserin  |4 aut 
700 1 |a Wang, Zhiheng  |e verfasserin  |4 aut 
700 1 |a Lu, Xiankai  |e verfasserin  |4 aut 
700 1 |a Zeng, Feiyan  |e verfasserin  |4 aut 
700 1 |a Wen, Dazhi  |e verfasserin  |4 aut 
700 1 |a Hou, Enqing  |e verfasserin  |4 aut 
700 1 |a Lai, Yuan  |e verfasserin  |4 aut 
700 1 |a Fang, Yunting  |e verfasserin  |4 aut 
700 1 |a Tu, Ying  |e verfasserin  |4 aut 
700 1 |a Xi, Dan  |e verfasserin  |4 aut 
700 1 |a Huang, Zhiqun  |e verfasserin  |4 aut 
700 1 |a Zhang, Dianxiang  |e verfasserin  |4 aut 
700 1 |a Wang, Rong  |e verfasserin  |4 aut 
700 1 |a Kuang, Yuanwen  |e verfasserin  |4 aut 
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773 1 8 |g volume:28  |g year:2022  |g number:18  |g day:01  |g month:09  |g pages:5441-5452 
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