干旱区生态环境知识资源中心(Arid): Features and driving factors of microbial metabolic limitation in mountain ecosystems in arid areas: A case study on the Helan Mountains, Northwest China

Arid

DOI	10.3389/ffgc.2022.1024656
	Features and driving factors of microbial metabolic limitation in mountain ecosystems in arid areas: A case study on the Helan Mountains, Northwest China
	Pang, Danbo; Liu, Bo; Wu, Mengyao; Li, Xuebin; Hu, Yang; Ma, Jinpeng; Zhao, Wenzhi; Chen, Lin
通讯作者	Chen, L
来源期刊	FRONTIERS IN FORESTS AND GLOBAL CHANGE
EISSN	2624-893X
出版年	2022
卷号	5
英文摘要	Insights into what limits the growth of soil microorganisms in mountain ecosystems increase our understanding of microbial functions and processes. Although the distribution pattern of soil microorganisms in mountain ecosystems has been widely studied, their role in biogeochemical cycles along elevation gradients of mountain ecosystems in arid regions is poorly understood. In this study we analyzed the soil physicochemical properties, soil microbial community structure, extracellular enzymatic activities, ecoenzymatic stoichiometry, microbial metabolism, and their relationships along the 1,300-2,500 m elevational gradient of the Helan Mountains, northwest China. The results showed that the total microbial biomass and its components did not significantly vary with elevation. The GP:GN (gram-positive: gram-negative bacteria) ratios at low elevations were higher than those at the mid and high elevations, indicating enrichment of oligotrophic bacteria at low elevations. The five extracellular enzymes significantly differed with elevation gradient, while the levels of carbon (C)- and nitrogen (N)- acquiring enzymes first increased and then decreased with increasing elevations. Ecoenzymatic stoichiometry indicated that significant limitation of microbial growth by carbon (C) and phosphorus (P) levels occurred at high and medium elevations. Soil physicochemical characteristics, microbial community composition, and ecoenzymatic activities accounted for 43.94 and 22.21% of the microbial C and P restriction, respectively. Our study suggests that mountain ecosystems with high organic C storage possess abundant microbial populations limited by relative C and P. The study also provides important insights linking microbial metabolisms to the environmental gradients in arid mountain ecosystems.
英文关键词	soil microbial community enzymatic stoichiometry microbial nutrient limitation elevation gradient Helan Mountains
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000907899800001
WOS关键词	EXTRACELLULAR ENZYME-ACTIVITY ; ROBINIA-PSEUDOACACIA PLANTATION ; ECOENZYMATIC STOICHIOMETRY ; COMMUNITY STRUCTURE ; LOESS PLATEAU ; NUTRIENT LIMITATION ; ELEVATION GRADIENT ; VEGETATION RESTORATION ; PHOSPHORUS LIMITATION ; NITROGEN DEPOSITION
WOS类目	Ecology ; Forestry
WOS研究方向	Environmental Sciences & Ecology ; Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392765
推荐引用方式 GB/T 7714	Pang, Danbo,Liu, Bo,Wu, Mengyao,et al. Features and driving factors of microbial metabolic limitation in mountain ecosystems in arid areas: A case study on the Helan Mountains, Northwest China[J],2022,5.
APA	Pang, Danbo.,Liu, Bo.,Wu, Mengyao.,Li, Xuebin.,Hu, Yang.,...&Chen, Lin.(2022).Features and driving factors of microbial metabolic limitation in mountain ecosystems in arid areas: A case study on the Helan Mountains, Northwest China.FRONTIERS IN FORESTS AND GLOBAL CHANGE,5.
MLA	Pang, Danbo,et al."Features and driving factors of microbial metabolic limitation in mountain ecosystems in arid areas: A case study on the Helan Mountains, Northwest China".FRONTIERS IN FORESTS AND GLOBAL CHANGE 5(2022).