Response of soil extracellular enzyme activity to experimental precipitation in a shrub-encroached grassland in Inner Mongolia

doi:10.1016/j.gecco.2020.e01175

	Response of soil extracellular enzyme activity to experimental precipitation in a shrub-encroached grassland in Inner Mongolia
	Akinyemi, Damilare Stephen 1; Zhu, Yankun 1; Zhao, Mengying 1; Zhang, Pujin 2,3; Shen, Haihua 1; Fang, Jingyun1
	2020
发表期刊	GLOBAL ECOLOGY AND CONSERVATION
卷号	23
摘要	Shrub encroachment has caused a vegetation shift in arid and semiarid grassland ecosystems around the world, leading to marked changes in ecosystem structures and functions. Soil extracellular enzyme activity (EEA) is an informative indicator of microbial decomposition and plays an important role in soil biogeochemical cycles, but it is unclear how shrub encroachment affects soil EEA, especially in the future precipitation pattern under climate change. In this study, we measured soil EEAs in a shrub-encroached grassland in Inner Mongolia, China, after four years of in situ experimental precipitation manipulation. Soil samples were collected from grass patches and shrub patches in four precipitation manipulation treatments (-30%, control, +30%, and +50%). Four soil enzymes involved in carbon cycling (alpha-glucosidase, AG; beta-1,4-glucosidase, BG; beta-D-cellobiosidase, CB; and beta-xylosidase, XS), two nitrogen-acquiring enzymes (beta-1,4-N-acetylglucosaminidase, NAG; and leucine amino peptidase, LAP), and one phosphorus-acquiring enzyme (acid phosphatase, AP) were investigated. The results showed that BG, XS, and LAP activities were significantly enhanced in shrub patches than grass patches (p < 0.05). BG, LAP, and AP were significantly different in precipitation treatments (p < 0.05) and were highest in +30% and shrub patches. Shrub encroachment and increased precipitation (+30%) interactively enhanced LAP (p < 0.05). Our study also showed that soil temperature and soil moisture were major factors for the variations in EEA under different precipitation treatments in the grass patches, while soil temperature, NH4+-N and NO3-N were major causes for those in the shrub patches. Overall, our study highlights that shrub encroachment and altered precipitation can influence soil EEA, which in turn may have consequential effects on nutrients availability and biochemical cycling. (c) 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
关键词	Altered precipitation Climate change Extracellular enzyme Shrub encroachment Soil
学科领域	Biodiversity Conservation ; Ecology
DOI	10.1016/j.gecco.2020.e01175
收录类别	SCI
语种	英语
WOS关键词	MICROBIAL BIOMASS C ; PHENOL OXIDASE ; PLANT INVASION ; CARBON ; ECOSYSTEM ; COMMUNITY ; DYNAMICS ; PULSE ; TEMPERATURE ; KINETICS
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS记录号	WOS:000568729100006
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	2351-9894
资助机构	National Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31330012, 31971747] ; National Key Research and Development Program [2017YFC0503901] ; Key Research Program of Frontier Sciences, CAS [QYZDY-SSW-SMC011] ; CAS-TWAS President's Fellowship
作者邮箱	shen.haihua@ibcas.ac.cn
作品OA属性	gold
引用统计	被引频次：19[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/21590
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inner Mongolia Prataculture Res Ctr, Hohhot 010031, Peoples R China 4.Inner Mongolia Acad Agr & Anim Husb Sci, Hohhot 010031, Inner Mongolia, Peoples R China
推荐引用方式 GB/T 7714	Akinyemi, Damilare Stephen,Zhu, Yankun,Zhao, Mengying,et al. Response of soil extracellular enzyme activity to experimental precipitation in a shrub-encroached grassland in Inner Mongolia[J]. GLOBAL ECOLOGY AND CONSERVATION,2020,23.
APA	Akinyemi, Damilare Stephen,Zhu, Yankun,Zhao, Mengying,Zhang, Pujin,Shen, Haihua,&Fang, Jingyun.(2020).Response of soil extracellular enzyme activity to experimental precipitation in a shrub-encroached grassland in Inner Mongolia.GLOBAL ECOLOGY AND CONSERVATION,23.
MLA	Akinyemi, Damilare Stephen,et al."Response of soil extracellular enzyme activity to experimental precipitation in a shrub-encroached grassland in Inner Mongolia".GLOBAL ECOLOGY AND CONSERVATION 23(2020).

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