气候变化领域集成服务门户(CCPortal): Abiotic and biotic controls of soil dissolved organic nitrogen along a precipitation gradient on the Tibetan plateau

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DOI	10.1007/s11104-020-04613-1
	Abiotic and biotic controls of soil dissolved organic nitrogen along a precipitation gradient on the Tibetan plateau
	Jiang, Lili; Wang, Shiping; Pang, Zhe; Wang, Changshun; Meng, Fandong; Lan, Zhichun; Zhou, Xiaoqi; Li, Yaoming; Zhang, Zhenhua; Luo, Caiyun; Jones, Davey L.; Rui, Yichao; Wang, Yanfen
通讯作者	Wang, YF (通讯作者)
发表日期	2021
ISSN	0032-079X
EISSN	1573-5036
起始页码	65
结束页码	78
卷号	459 期号:1-2
英文摘要	Background and aims Dissolved organic nitrogen (DON) has been increasingly recognized as a crucial component of the terrestrial nitrogen (N) cycle that regulates the ecosystem feedback to climate change. Yet, little information is available about the factors that control soil DON in the alpine ecosystems of the Tibetan Plateau, a region that is extremely sensitive to climate change. Methods Here, we examined the relationship between DON and climate, plant, and soil attributes along a precipitation gradient in five alpine ecosystems (alpine wetland, alpine meadow, alpine shrub, alpine steppe, and alpine desert) across 20 sites that were up to 4000 km apart on the Tibetan Plateau. Results Results showed that soil DON concentration varied significantly across these alpine ecosystems, and had a positive relationship with mean annual precipitation. Belowground biomass, soil moisture, micro biomass carbon (MBC), and soil total phosphorus (TP) explained 84% of the variation in DON concentrations. The percentage of DON in soil total dissolved N (TDN) varied with vegetation type, with the lowest percentage observed in the alpine meadow (52%) and the highest in the alpine desert (77%), indicating the slow turnover of DON into inorganic N in systems with low litter input and microbial activity. Conclusions Precipitation and plant biomass input determine the concentration and turnover of soil DON on the Tibetan Plateau. A warmer and wetter climate that has been predicted for the Tibetan grasslands may lead to a larger and more active DON pool.
关键词	MICROBIAL BIOMASS GRASSLAND DYNAMICS CARBON PHOSPHORUS PLANTS ACID DON MICROORGANISMS STOICHIOMETRY
英文关键词	Soil inorganic N; DOC; DON; Biomass; Alpine grassland
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS记录号	WOS:000545900900001
来源期刊	PLANT AND SOIL
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260496
推荐引用方式 GB/T 7714	Jiang, Lili,Wang, Shiping,Pang, Zhe,et al. Abiotic and biotic controls of soil dissolved organic nitrogen along a precipitation gradient on the Tibetan plateau[J]. 中国科学院青藏高原研究所,2021,459(1-2).
APA	Jiang, Lili.,Wang, Shiping.,Pang, Zhe.,Wang, Changshun.,Meng, Fandong.,...&Wang, Yanfen.(2021).Abiotic and biotic controls of soil dissolved organic nitrogen along a precipitation gradient on the Tibetan plateau.PLANT AND SOIL,459(1-2).
MLA	Jiang, Lili,et al."Abiotic and biotic controls of soil dissolved organic nitrogen along a precipitation gradient on the Tibetan plateau".PLANT AND SOIL 459.1-2(2021).