气候变化领域集成服务门户(CCPortal): Plant-microbe interactions regulate the aboveground community nitrogen accumulation rate in different environmental conditions on the Tibetan Plateau

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DOI	10.1016/j.catena.2021.105407
	Plant-microbe interactions regulate the aboveground community nitrogen accumulation rate in different environmental conditions on the Tibetan Plateau
	Zhou, Tiancai; Sun, Jian; Shi, Peili
通讯作者	Sun, J ; Shi, PL (通讯作者)
发表日期	2021
ISSN	0341-8162
EISSN	1872-6887
卷号	204
英文摘要	Experimental studies have well illustrated that plant and microbe interactions play an important role in the absorption of nitrogen (N) under different environmental conditions. However, it remains to be seen what role plant-microbe interactions play in regulating plant N accumulation rates (NAR) over broad climatic and geographic scales. Here, a transect survey was conducted in alpine grassland on the Tibetan Plateau to measure aboveground net primary production and plant N concentration corresponding with phenology indexes, the NAR patterns were measured by changepoint analysis. Meanwhile, matrix correlation analysis and variation partitioning analysis were performed to explore the dynamic of NAR in response to environment factors. Finally, structural equation model was employed to express the path coefficients of environmental factors on NAR. A significantly (P<0.05) lower NAR (8.9 mg/m(2)/day) in cold-dry climates than that in warm-wet climates (31.1 mg/m(2)/day) were detected. Our results further demonstrated a cooperative interaction between microbes and plants stimulated NAR in weakly resource-limited environments but a competitive effect of microbes on plants-constrained NAR in strongly resource-limited environments. The NAR was strongly governed by coupled water-heat availability and microbial biomass via their effects on plant diversity. Our findings highlighted that plant-microbe interactions offered an important framework to better understand the generalizable mechanisms of plant N accumulation in different environmental conditions. The knowledge of ecological N accumulation mechanisms obtained here not only emphasized the importance of incorporating plant phenology and dynamics of plant N into the ecological N cycle model but also promoted our understanding of resource utilization between plants and soil microbes under ongoing global climate change.
关键词	SOIL BACTERIAL ELEVATED CO2 RESPONSES CARBON WATER ECOSYSTEM DYNAMICS CLIMATE AVAILABILITY PRODUCTIVITY
英文关键词	Alpine ecosystem; Environmental conditions; Plant nitrogen; Soil microbes; Nitrogen accumulate rate; Tibetan Plateau
语种	英语
WOS研究方向	Geology ; Agriculture ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS记录号	WOS:000657369600023
来源期刊	CATENA
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/260165
推荐引用方式 GB/T 7714	Zhou, Tiancai,Sun, Jian,Shi, Peili. Plant-microbe interactions regulate the aboveground community nitrogen accumulation rate in different environmental conditions on the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2021,204.
APA	Zhou, Tiancai,Sun, Jian,&Shi, Peili.(2021).Plant-microbe interactions regulate the aboveground community nitrogen accumulation rate in different environmental conditions on the Tibetan Plateau.CATENA,204.
MLA	Zhou, Tiancai,et al."Plant-microbe interactions regulate the aboveground community nitrogen accumulation rate in different environmental conditions on the Tibetan Plateau".CATENA 204(2021).