Impact of inorganic nitrogen additions on microbes in biological soil crusts

doi:10.1016/j.soilbio.2015.06.004

CORC > 兰州理工大学 > 兰州理工大学

	Impact of inorganic nitrogen additions on microbes in biological soil crusts
	Wang, Jin 1; Bao, Jingting 1,2,3; Su, Jieqiong 1; Li, Xinrong 1; Chen, Guoxiong 1; Ma, Xiaofei 1
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2015-09
卷号	88 页码:303-313
关键词	Biological soil crusts Nitrogen addition Bacteria Fungi Pyrosequencing
ISSN号	0038-0717
DOI	10.1016/j.soilbio.2015.06.004
英文摘要	Many studies have shown that changes in nitrogen (N) availability affect the diversity and composition of soil microbial community in a variety of terrestrial systems, but less is known about the responses of microbes specific to biological soil crusts (BSCs) to increasing N additions. After seven years of field experiment, the bacterial diversity in lichen-dominated crusts decreased linearly with increasing inorganic N additions (ambient N deposition; low N addition, 3.5 g N m(-2) y(-1); medium N addition, 7.0 g N m(-2) y(-1); high N addition, 14.0 g N m(-2) y(-1)), whereas the fungal diversity exhibited a distinctive pattern, with the low N-added crust containing a higher diversity than the other crusts. Pyrosequencing data revealed that the bacterial community shifted to more Cyanobacteria with modest N additions (low N and medium N) and to more Actinobacteria and Proteobacteria and much less Cyanobacteria with excess N addition (high N). Our results suggest that soil pH, together with soil organic carbon (C), structures the bacterial communities with N additions. Among the fungal communities, the relative abundance of Ascomycota increased with modest N but decreased with excess N. However, increasing N additions favored Basidiomycota, which may be ascribed to increases in substrate availability with low lignin and high cellulose contents under elevated N conditions. Bacteria/fungi ratios were higher in the N-added samples than in the control, suggesting that the bacterial biomass tends to dominate over that of fungi in lichen-dominated crusts after N additions, which is especially evident in the excess N condition. Because bacteria and fungi are important components and important decomposers in BSCs, the alterations of the bacterial and fungal communities may have implications in the formation and persistence of BSCs and the cycling and storage of C in desert ecosystems. (C) 2015 Elsevier Ltd. All rights reserved.
资助项目	Innovation Research Group Fund of Gansu Province, China[1308RJIA002]
WOS研究方向	Agriculture
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000359880600035
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33993]
专题	兰州理工大学
通讯作者	Wang, Jin
作者单位	1.Chinese Acad Sci, Lab Plant Stress Ecophysiol & Biotechnol, Shapotou Desert Expt & Res Stn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 2.Lanzhou Univ Technol, Sch Life Sci & Engn, Lanzhou 730050, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jin,Bao, Jingting,Su, Jieqiong,et al. Impact of inorganic nitrogen additions on microbes in biological soil crusts[J]. SOIL BIOLOGY & BIOCHEMISTRY,2015,88:303-313.
APA	Wang, Jin,Bao, Jingting,Su, Jieqiong,Li, Xinrong,Chen, Guoxiong,&Ma, Xiaofei.(2015).Impact of inorganic nitrogen additions on microbes in biological soil crusts.SOIL BIOLOGY & BIOCHEMISTRY,88,303-313.
MLA	Wang, Jin,et al."Impact of inorganic nitrogen additions on microbes in biological soil crusts".SOIL BIOLOGY & BIOCHEMISTRY 88(2015):303-313.