Extracellular enzyme stoichiometry reveals the carbon and phosphorus limitations of microbial metabolisms in the rhizosphere and bulk soils in alpine ecosystems

doi:10.1007/s11104-019-04159-x

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Extracellular enzyme stoichiometry reveals the carbon and phosphorus limitations of microbial metabolisms in the rhizosphere and bulk soils in alpine ecosystems
	Cui, Yongxing 2,3,4; Bing, Haijian 5; Fang, Linchuan 1,2,3; Jiang, Mao 2,3; Shen, Guoting 2,3; Yu, Jialuo 2,3,4; Wang, Xia 2,3,4; Zhu, He 5; Wu, Yanhong 5; Zhang, Xingchang 2,3
刊名	PLANT AND SOIL
	2021
卷号	458 期号:1-2 页码:7-20
关键词	Microbial nutrient limitation Extracellular enzyme stoichiometry Rhizosphere Altitudinal gradients Alpine ecosystem
ISSN号	0032-079X
DOI	10.1007/s11104-019-04159-x
通讯作者	Fang, Linchuan(flinc629@hotmail.com)
产权排序	4
文献子类	Article
英文摘要	Aims Alpine ecosystems are important terrestrial carbon (C) pools, and microbial decomposers play a key role in cycling soil C. Microbial metabolic limitations in these ecosystems, however, have rarely been studied. The objectives of this study are to reveal the characteristics of microbial nutrient limitation, and decipher the drivers in the alpine ecosystems. Methods Models of extracellular enzymatic stoichiometry were applied to examine and compare the metabolic limitations of the microbial communities in bulk and rhizosphere soils along an altitudinal gradient (2800-3500 m a.s.l.) under the same type of vegetation (Abies fabri) on Gongga Mountain, eastern Tibetan Plateau. Results The soil microbial communities suffered from relative C and phosphorus (P) limitations in the alpine ecosystem despite of high soil nutrient contents here. Partial least squares path modelling (PLS-PM) revealed that the limitations were directly regulated by soil nutrient stoichiometry, followed by nutrient availability. The C and P limitations were higher at the high altitudes (3000-3500 m) than that at the low altitude (2800 m), which mainly attribute to changes of soil temperature and moisture along the altitudinal gradient. This suggested that global warming may relieve microbial metabolic limitation in the alpine ecosystems, and then is conducive to the retention of organic C in soil. Furthermore, the C and P limitations varied significantly between the bulk and rhizosphere soils at the high altitudes (3200-3500 m), but not at the low altitudes. This indicated the influences of vegetation on the microbial metabolisms, while the influences could decrease under the scenario of global warming. Conclusions Our study suggests that the alpine ecosystems with high organic C storage harbour abundant microbial populations limited by relative C and P, which have sensitive metabolic characteristics. This could thus potentially lead to large fluctuations in the soil C turnover under climate change. The study provides important insights linking microbial metabolisms to the environmental gradients, and improves our understanding of C cycling in alpine ecosystems.
电子版国际标准刊号	1573-5036
WOS研究方向	Agriculture ; Plant Sciences
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000607876500002
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/55228]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Fang, Linchuan
作者单位	1.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 2.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; 3.MWR, Yangling 712100, Shaanxi, Peoples R China; 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 5.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China;
推荐引用方式 GB/T 7714	Cui, Yongxing,Bing, Haijian,Fang, Linchuan,et al. Extracellular enzyme stoichiometry reveals the carbon and phosphorus limitations of microbial metabolisms in the rhizosphere and bulk soils in alpine ecosystems[J]. PLANT AND SOIL,2021,458(1-2):7-20.
APA	Cui, Yongxing.,Bing, Haijian.,Fang, Linchuan.,Jiang, Mao.,Shen, Guoting.,...&Zhang, Xingchang.(2021).Extracellular enzyme stoichiometry reveals the carbon and phosphorus limitations of microbial metabolisms in the rhizosphere and bulk soils in alpine ecosystems.PLANT AND SOIL,458(1-2),7-20.
MLA	Cui, Yongxing,et al."Extracellular enzyme stoichiometry reveals the carbon and phosphorus limitations of microbial metabolisms in the rhizosphere and bulk soils in alpine ecosystems".PLANT AND SOIL 458.1-2(2021):7-20.