Identifying thresholds of nitrogen enrichment for substantial shifts in arbuscular mycorrhizal fungal community metrics in a temperate grassland of northern China

	Identifying thresholds of nitrogen enrichment for substantial shifts in arbuscular mycorrhizal fungal community metrics in a temperate grassland of northern China
	Wu, Hui; Yang, Junjie ; Fu, Wei; Rillig, Matthias C.; Cao, Zhenjiao; Zhao, Aihua ; Hao, Zhipeng; Zhang, Xin ; Chen, Baodong; Han, Xingguo
	2023
Source Publication	NEW PHYTOLOGIST
ISSN	0028-646X
Volume	237 Issue:1 Pages:1-16
Abstract	Nitrogen (N) enrichment poses threats to biodiversity and ecosystem stability, while arbuscular mycorrhizal (AM) fungi play important roles in ecosystem stability and functioning. However, the ecological impacts, especially thresholds of N enrichment potentially causing AM fungal community shifts have not been adequately characterized. Based on a long-term field experiment with nine N addition levels ranging from 0 to 50 g N m(-2) yr(-1) in a temperate grassland, we characterized the community response patterns of AM fungi to N enrichment. Arbuscular mycorrhizal fungal biomass continuously decreased with increasing N addition levels. However, AM fungal diversity did not significantly change below 20 g N m(-2) yr(-1), but dramatically decreased at higher N levels, which drove the AM fungal community to a potentially unstable state. Structural equation modeling showed that the decline in AM fungal biomass could be well explained by soil acidification, whereas key driving factors for AM fungal diversity shifted from soil nitrogen : phosphorus (N : P) ratio to soil pH with increasing N levels. Different aspects of AM fungal communities (biomass, diversity and community composition) respond differently to increasing N addition levels. Thresholds for substantial community shifts in response to N enrichment in this grassland ecosystem are identified.
Department	城市与区域生态国家重点实验室
Keyword	arbuscular mycorrhizal fungi biodiversity community response global change nitrogen deposition stability threshold
Document Type	期刊论文
Identifier	https://ir.rcees.ac.cn/handle/311016/48409
Collection	城市与区域生态国家重点实验室
Affiliation	1.Chinese Academy of Sciences 2.Research Center for Eco-Environmental Sciences (RCEES) 3.University of Chinese Academy of Sciences, CAS 4.Institute of Botany, CAS 5.Free University of Berlin
Recommended Citation GB/T 7714	Wu, Hui,Yang, Junjie,Fu, Wei,et al. Identifying thresholds of nitrogen enrichment for substantial shifts in arbuscular mycorrhizal fungal community metrics in a temperate grassland of northern China[J]. NEW PHYTOLOGIST,2023,237(1):1-16.
APA	Wu, Hui.,Yang, Junjie.,Fu, Wei.,Rillig, Matthias C..,Cao, Zhenjiao.,...&Han, Xingguo.(2023).Identifying thresholds of nitrogen enrichment for substantial shifts in arbuscular mycorrhizal fungal community metrics in a temperate grassland of northern China.NEW PHYTOLOGIST,237(1),1-16.
MLA	Wu, Hui,et al."Identifying thresholds of nitrogen enrichment for substantial shifts in arbuscular mycorrhizal fungal community metrics in a temperate grassland of northern China".NEW PHYTOLOGIST 237.1(2023):1-16.

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