干旱区生态环境知识资源中心(Arid): Natural degradation process of Salix psammophila sand barriers regulates desert soil microbial biomass C:N:P stoichiometry and homeostasis

Arid

DOI	10.1016/j.catena.2022.106880
	Natural degradation process of Salix psammophila sand barriers regulates desert soil microbial biomass C:N:P stoichiometry and homeostasis
	Liang, Yumei; Gao, Yong; Meng, Zhongju; Han, Yanlong; Wang, Ruidong; Duan, Xiaoting
通讯作者	Gao, Y
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2023
卷号	222
英文摘要	The Salix psammophila sand barrier is widely used to control wind-sand disasters in desert areas. Importantly, the means through which the natural degradation of the sand-buried section of these sand barriers contributes to the community-level microbial elemental homeostasis of desert soils remains elusive. In this study, we conducted long-term field in situ sampling experiments over a nine-year period in a typical study area in the desert region of northwest China. Chloroform fumigation and high-throughput sequencing were used to determine soil microbial biomass and the diversity of fungi and bacteria. Combined with sand barrier decay characteristics, soil physi-cochemical factors, and extracellular enzyme activities, we explored the dynamic balance of soil microbial element ratios and key driving factors. The results show that natural degradation of S. psammophila sand barriers increased microbial biomass C and N contents in desert soil, with seven years being the most important turning point. The consistent increase in the soil microbial C:N:P stoichiometry ratios was primarily directly caused by an increase in the mass loss and changes in the fungal diversity. Microbial C:N and N:P ratios were well limited over time, suggesting homeostatic regulation of microorganisms, but the C:P ratio was not homogenized at the community level. The higher microbial C:P and N:P ratios indicated that microorganisms were limited by P after five years of sand barrier degradation. This was primarily related to a decrease in the soil alkaline phosphatase activity. However, microorganisms mitigated P limitation by altering the fungal community structure. These results constitute new evidence in our understanding of the relationships between S. psammophila sand barriers and soil element stoichiometry and the subsequent effects on microorganisms and community-level elemental homeostasis. This work advances the current understanding of artificial interventions in ecological restoration and desertification control.
英文关键词	Desertification control Salix psammophila sand barriers Natural degradation Microbial stoichiometry ratios Homeostasis
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000915042800001
WOS关键词	N-P STOICHIOMETRY ; ENZYME-ACTIVITIES ; ECOENZYMATIC STOICHIOMETRY ; ORGANIC-MATTER ; LOESS PLATEAU ; NITROGEN ; FUMIGATION ; EXTRACTION ; COMMUNITY ; RESPONSES
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/2XILL650/395668
推荐引用方式 GB/T 7714	Liang, Yumei,Gao, Yong,Meng, Zhongju,et al. Natural degradation process of Salix psammophila sand barriers regulates desert soil microbial biomass C:N:P stoichiometry and homeostasis[J],2023,222.
APA	Liang, Yumei,Gao, Yong,Meng, Zhongju,Han, Yanlong,Wang, Ruidong,&Duan, Xiaoting.(2023).Natural degradation process of Salix psammophila sand barriers regulates desert soil microbial biomass C:N:P stoichiometry and homeostasis.CATENA,222.
MLA	Liang, Yumei,et al."Natural degradation process of Salix psammophila sand barriers regulates desert soil microbial biomass C:N:P stoichiometry and homeostasis".CATENA 222(2023).