Distinguishing Stoichiometric Homeostasis of Soil Microbial Biomass in Alpine Grassland Ecosystems: Evidence From 5,000 km Belt Transect Across Qinghai-Tibet Plateau

doi:10.3389/fpls.2021.781695

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

	Distinguishing Stoichiometric Homeostasis of Soil Microbial Biomass in Alpine Grassland Ecosystems: Evidence From 5,000 km Belt Transect Across Qinghai-Tibet Plateau
	Fan, Jihui 3; Liu, Tianyuan 1,2; Liao, Ying 1,3; Li, Yiying 1,3; Yan, Yan 3; Lu, Xuyang 3
刊名	FRONTIERS IN PLANT SCIENCE
	2021-12-02
卷号	12 页码:12
关键词	Qinghai-Tibet Plateau (QTP) alpine grassland soil microbe stoichiometric homeostasis trade-off
ISSN号	1664-462X
DOI	10.3389/fpls.2021.781695
英文摘要	The biogeographic characteristics of soil microbial biomass stoichiometry homeostasis and also its mechanisms are commonly thought to be key factors for the survival strategies and resource utilization of soil microbes under extreme habitat. In this work, we conducted a 5,000-km transect filed survey in alpine grassland across Qinghai-Tibet Plateau in 2015 to measure soil microbial biomass carbon (MBC) and nitrogen (MBN) across alpine steppe and meadow. Based on the differences of climate and soil conditions between alpine steppe and meadow, the variation coefficient was calculated to investigate the homeostatic degree of MBC to MBN. Furthermore, the "trade-off" model was utilized to deeply distinguish the homeostasis degree of MBC/MBN between alpine steppe and meadow, and the regression analysis was used to explore the variability of trade-off in response to environmental factors in the alpine grassland. The results showed that the coefficient of variation (CV) of MBC/MBN in alpine meadow (CV = 0.4) was lower than alpine steppe (CV = 0.7). According to the trade-off model, microbial turnover activity of soil N relative to soil C increased rapidly and then decreased slightly with soil organic carbon (SOC), soil total nitrogen (STN), and soil water content across alpine meadow. Nevertheless, in alpine steppe, SOC/STN had a positive effect on microbial turnover of soil N. These results suggested that water, heat, and soil nutrients availability were the key factors affecting the C:N stoichiometry homeostasis of soil microbial biomass in Qinghai-Tibet Plateau (QTP)'s alpine grassland. Since the difference of survival strategy of the trade-off demands between soil C and N resulting in different patterns and mechanism, the stoichiometry homeostasis of soil microbial biomass was more stable in alpine meadow than in alpine steppe.
资助项目	National Natural Science Foundation of China[41871072] ; National Natural Science Foundation of China[1871040] ; National Natural Science Foundation of China[41877338]
WOS关键词	FUMIGATION-EXTRACTION METHOD ; N-P STOICHIOMETRY ; PHOSPHORUS STOICHIOMETRY ; LEAF NITROGEN ; BIOLOGICAL STOICHIOMETRY ; ECOLOGICAL STOICHIOMETRY ; CARBON ; COMMUNITY ; AVAILABILITY ; DEGRADATION
WOS研究方向	Plant Sciences
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000730870400001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/56344]
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	Yan, Yan
作者单位	1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China 2.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modelling, Synth Res Ctr Chinese Ecosyst Res Network, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Peoples R China
推荐引用方式 GB/T 7714	Fan, Jihui,Liu, Tianyuan,Liao, Ying,et al. Distinguishing Stoichiometric Homeostasis of Soil Microbial Biomass in Alpine Grassland Ecosystems: Evidence From 5,000 km Belt Transect Across Qinghai-Tibet Plateau[J]. FRONTIERS IN PLANT SCIENCE,2021,12:12.
APA	Fan, Jihui,Liu, Tianyuan,Liao, Ying,Li, Yiying,Yan, Yan,&Lu, Xuyang.(2021).Distinguishing Stoichiometric Homeostasis of Soil Microbial Biomass in Alpine Grassland Ecosystems: Evidence From 5,000 km Belt Transect Across Qinghai-Tibet Plateau.FRONTIERS IN PLANT SCIENCE,12,12.
MLA	Fan, Jihui,et al."Distinguishing Stoichiometric Homeostasis of Soil Microbial Biomass in Alpine Grassland Ecosystems: Evidence From 5,000 km Belt Transect Across Qinghai-Tibet Plateau".FRONTIERS IN PLANT SCIENCE 12(2021):12.