气候变化领域集成服务门户(CCPortal): Soil extracellular enzymes characteristics and their controlling factors along the elevation gradient in Qinghai-Tibet Plateau, China

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DOI	10.1016/j.apsoil.2023.104862
	Soil extracellular enzymes characteristics and their controlling factors along the elevation gradient in Qinghai-Tibet Plateau, China
	Pan, Yan-xia; Li, Xin-rong; Wang, Zeng-ru; Feng, Li; Huang, Lei; Wang, Bing-yao; Sun, Jing-yao
发表日期	2023
ISSN	0929-1393
EISSN	1873-0272
卷号	188
英文摘要	Soil extracellular enzyme activities (EEAs) and ecoenzymatic stoichiometry (EES) play an essential role in soil nutrient cycling and organic matter decomposition. Understanding EEAs and EES variation patterns and their influencing factors could offer direct information about the soil structure, function, and soil response to anthropogenic disturbances and climate change. This issue is noteworthy, especially in high-altitude areas where climate change is imminent and vegetation is diversified. This study measured different soil EEAs and EES characteristics and explored their key controlling factors along nine altitudes ranging from 2500 m to over 5200 m in the Qinghai-Tibet Plateau of western China. We also analyzed the effects of plant microhabitats on soil EEAs and EES. The results showed that most soil EEAs and EES had significant variability in spatial characteristics, and enzymatic activity increased with altitude. Compared to the soil nutrient distribution which also increased with altitude, this same change trend of soil EEAs and soil nutrients was inconsistent with the resource allocation theory. Microorganisms might mediate the effects of environmental factors on soil EEAs by altering the enzyme production efficiency. Specific soil EEAs (EEAs/g SOC), like soil enzyme carbon: phosphorus ratios (ECP), and nitrogen: phosphorus ratios (ENP), showed an opposing trend in variation, which decreased with increasing altitude. Plant microhabitats significantly promoted soil EEAs due to the accumulation of soil nutrients (carbon, nitrogen and phosphorus). Soil EEAs and EES's spatial variability was mainly determined by edaphic factors, accounting for >70.24 % and 55.67 % of latitudinal variations, respectively. Generally, carbon and nitrogen limitations were substantial in this area and gradually alleviated with increasing altitude. This study provided a data support for ecological protection of the Qinghai-Tibet Plateau based on the spatial variation of soil EEAs and nutrient limitation.
关键词	Extracellular enzyme activity Ecoenzymatic stoichiometry Altitude Microsite Influence factor
英文关键词	ECOENZYMATIC STOICHIOMETRY; NUTRIENT ACQUISITION; MICROBIAL BIOMASS; NITROGEN; LIMITATION; RHIZOSPHERE; TEMPERATURE; TRANSECT; TERM
WOS研究方向	Soil Science
WOS记录号	WOS:000951713900001
来源期刊	APPLIED SOIL ECOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283089
作者单位	Chinese Academy of Sciences; Lanzhou University
推荐引用方式 GB/T 7714	Pan, Yan-xia,Li, Xin-rong,Wang, Zeng-ru,et al. Soil extracellular enzymes characteristics and their controlling factors along the elevation gradient in Qinghai-Tibet Plateau, China[J],2023,188.
APA	Pan, Yan-xia.,Li, Xin-rong.,Wang, Zeng-ru.,Feng, Li.,Huang, Lei.,...&Sun, Jing-yao.(2023).Soil extracellular enzymes characteristics and their controlling factors along the elevation gradient in Qinghai-Tibet Plateau, China.APPLIED SOIL ECOLOGY,188.
MLA	Pan, Yan-xia,et al."Soil extracellular enzymes characteristics and their controlling factors along the elevation gradient in Qinghai-Tibet Plateau, China".APPLIED SOIL ECOLOGY 188(2023).