干旱区生态环境知识资源中心(Arid): Soil extracellular enzyme activity and microbial resource limitation exhibited close relationships with groundwater table decline in desert wetlands

Arid

DOI	10.1016/j.catena.2023.107754
	Soil extracellular enzyme activity and microbial resource limitation exhibited close relationships with groundwater table decline in desert wetlands
	Wang, Kun; Mao, Xinping; Yang, Jiejun; Wen, Miao; Han, Fengpeng
通讯作者	Han, FP
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2024
卷号	236
英文摘要	In groundwater-fed desert wetlands, groundwater table (GWT) decline leads to the loss of carbon and nutrients, followed by the expansion of desertification. How the GWT decline affects soil nutrient cycling and microbial resource limitation is still unclear. Here, we sampled soils along a steep GWT decline gradient in desert wetlands and surroundings traversing marshland (ML), sandy grassland (SG) and bare sandy land (SL) in the southern margin of Mu Us Sandy Land, China, then determined the extracellular enzyme activity (EEA, including carbon (C)-, nitrogen (N)-and phosphorus (P)-acquiring enzymes) and related soil environmental variables, and quantified the relative value of microbial metabolic limitation by vector analysis. Results showed that GWT decline eventually inhibited the activities of soil C-, N-and P-acquiring enzymes, which might be unfavourable for nutrient cycling. The relationship between soil microbial C limitation and GWT showed a downwards unimodal trend, despite the largest SOC value observed in ML. However, microbial P limitation was relieved by a slight GWT decline, and the continuous decline in GWT eventually shifted microorganisms from P to N limitation. We further provide evidence that DOC and C:P were the key factors explaining the variations in microbial C and nutrient limitations along the decline in GWT, respectively. Altogether, these findings suggest that soil EEA and microbial resource limitation exhibit close relationships with GWT decline in desert wetlands. Moreover, they highlight that alleviating microbial N limitation may be the primary solution for vegetation restoration and carbon sequestration in sandy land around wetlands.
英文关键词	Extracellular enzyme activity Groundwater table Soil microorganisms Microbial resource limitation Desertification
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001139065900001
WOS关键词	ECOENZYMATIC STOICHIOMETRY ; ORGANIC-MATTER ; CARBON ; VEGETATION ; AREA ; DESERTIFICATION ; QUALITY ; PLANTS ; ZOIGE ; WATER
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403129
推荐引用方式 GB/T 7714	Wang, Kun,Mao, Xinping,Yang, Jiejun,et al. Soil extracellular enzyme activity and microbial resource limitation exhibited close relationships with groundwater table decline in desert wetlands[J],2024,236.
APA	Wang, Kun,Mao, Xinping,Yang, Jiejun,Wen, Miao,&Han, Fengpeng.(2024).Soil extracellular enzyme activity and microbial resource limitation exhibited close relationships with groundwater table decline in desert wetlands.CATENA,236.
MLA	Wang, Kun,et al."Soil extracellular enzyme activity and microbial resource limitation exhibited close relationships with groundwater table decline in desert wetlands".CATENA 236(2024).