干旱区生态环境知识资源中心(Arid): Effect of repeated drying-rewetting cycles on soil extracellular enzyme activities and microbial community composition in arid and semi-arid ecosystems

Arid

DOI	10.1016/j.ejsobi.2020.103187
	Effect of repeated drying-rewetting cycles on soil extracellular enzyme activities and microbial community composition in arid and semi-arid ecosystems
	Ouyang, Yang 1,2,3; Li, Xuyong 1,2
通讯作者	Li, Xuyong
来源期刊	EUROPEAN JOURNAL OF SOIL BIOLOGY
ISSN	1164-5563
EISSN	1778-3615
出版年	2020
卷号	98
英文摘要	Climate change is predicted to alter precipitation patterns, which may have profound consequences on soil microbial communities and functions in arid and semi-arid ecosystems. However, it is uncertain if the direction and magnitude of soil microbial function and community responses to repeated drying and rewetting (DRW) events differ in diverse arid and semi-arid ecosystems. We collected surface soils in forest, farmland, grassland, and desert ecosystems from the Chinese Ecosystem Research Network (CERN) with mean annual precipitation ranged from 164 to 600 mm. Soils were then exposed to 0, 2, 5, 7 and 14 DRW cycles with variable drought periods at 20 degrees C. Soil respiration was measured in the rewetting phases of each DRW cycle. We also measured microbial biomass carbon (C), dissolved organic C, inorganic nitrogen, activities of four C-acquisition extracellular enzymes (beta-glucosidase, cellobiohydrolase, phenol oxidase, and peroxidase), and microbial community structure after the last DRW cycle. Results showed that repeated DRW cycles significantly affected most microbial parameters in our study. Specifically, repeated DRW cycles increased activities of beta-glucosidase and cellobiohydrolase. Lower DRW frequencies with longer drought periods had higher soil respiration, microbial biomass C, and the relative abundance of fungi. The responses of soil enzyme activities to repeated DRW were similar in the four ecosystems. However, soil microbial biomass and community composition were generally more resistant to repeated DRW cycles in the forest soil, while they were more vulnerable to repeated DRW stress in the desert soil, suggesting that altered precipitation patterns may have a greater impact on soil microbial communities in more arid ecosystems.
英文关键词	Soil moisture Dry land Birch effect Respiration Microbial biomass Extracellular enzyme activities PLFA
类型	Article
语种	英语
国家	Peoples R China ; USA
收录类别	SCI-E
WOS记录号	WOS:000534259000001
WOS关键词	ORGANIC-MATTER ; BIOMASS ; RESPIRATION ; NITROGEN ; PULSES ; CARBON ; FREQUENCY ; BACTERIAL ; DROUGHT ; WATER
WOS类目	Ecology ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319036
作者单位	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, 18 Shuangqing Rd, Beijing 100085, Peoples R China; 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China; 3.Univ Oklahoma, Inst Environm Gen, Norman, OK 73019 USA
推荐引用方式 GB/T 7714	Ouyang, Yang,Li, Xuyong. Effect of repeated drying-rewetting cycles on soil extracellular enzyme activities and microbial community composition in arid and semi-arid ecosystems[J],2020,98.
APA	Ouyang, Yang,&Li, Xuyong.(2020).Effect of repeated drying-rewetting cycles on soil extracellular enzyme activities and microbial community composition in arid and semi-arid ecosystems.EUROPEAN JOURNAL OF SOIL BIOLOGY,98.
MLA	Ouyang, Yang,et al."Effect of repeated drying-rewetting cycles on soil extracellular enzyme activities and microbial community composition in arid and semi-arid ecosystems".EUROPEAN JOURNAL OF SOIL BIOLOGY 98(2020).