干旱区生态环境知识资源中心(Arid): Effects of disturbance on soil microbial abundance in biological soil crusts on the Loess Plateau, China

Arid

DOI	10.1016/j.jaridenv.2019.01.003
	Effects of disturbance on soil microbial abundance in biological soil crusts on the Loess Plateau, China
	Bao, Tianli 1,2; Zhao, Yunge 1,3,4; Yang, Xueqin 1,3; Ren, Wei 1,2; Wang, Shanshan 1,2
通讯作者	Zhao, Yunge
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2019
卷号	163 页码:59-67
英文摘要	Biological soil crusts (biocrusts) are important surface cover in drylands, but they are vulnerable to disturbance. To date, research has mostly specialized in changes in the soil microorganisms between disturbed and undisturbed biocrusts, and it is unclear whether disturbance intensity drives the soil microorganisms in biocrusts toward distinct responses. Thus, we investigated the changes in biocrust characteristics, soil properties and microbial abundance at six simulated grazing disturbance gradients (based on the coverage of the broken biocrusts) in the Loess Plateau region of China. The results showed that moderate disturbance, in which the biocrust coverage experienced a 20-30% breakage, was beneficial for improving the abundances of bacteria, actinomycetes and total microorganisms, but severe disturbance (i.e., 40-50% disturbance) may result in a significant reduction in abundance. The increased fungal abundance with the disturbance gradients was related to the aerobic feature of fungi. Additionally, a varied proportion of actinomycetes and bacterial abundance was found under disturbance. Disturbance induced the alteration of soil aeration, moisture and nutrient status (total N or ratio of C/N) that driving the changes of microbial abundance. These results will be meaningful for evaluating the ecosystem services of biocrusts under a disturbance event in dryland ecosystems.
英文关键词	Biological soil crust Cyanobacteria Moss Ecological function Dryland
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000459236300008
WOS关键词	NITROGEN-FIXATION ; ECOSYSTEM DEVELOPMENT ; SUCCESSIONAL STAGES ; ORGANIC-CARBON ; GERMINATION ; DIVERSITY ; DYNAMICS ; DESERT ; IMPACT ; ESTABLISHMENT
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216727
作者单位	1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China; 4.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Bao, Tianli,Zhao, Yunge,Yang, Xueqin,et al. Effects of disturbance on soil microbial abundance in biological soil crusts on the Loess Plateau, China[J]. 西北农林科技大学,2019,163:59-67.
APA	Bao, Tianli,Zhao, Yunge,Yang, Xueqin,Ren, Wei,&Wang, Shanshan.(2019).Effects of disturbance on soil microbial abundance in biological soil crusts on the Loess Plateau, China.JOURNAL OF ARID ENVIRONMENTS,163,59-67.
MLA	Bao, Tianli,et al."Effects of disturbance on soil microbial abundance in biological soil crusts on the Loess Plateau, China".JOURNAL OF ARID ENVIRONMENTS 163(2019):59-67.