干旱区生态环境知识资源中心(Arid): Biocrust cover and successional stages influence soil bacterial composition and diversity in semiarid ecosystems

Arid

DOI	10.1016/j.scitotenv.2019.134654
	Biocrust cover and successional stages influence soil bacterial composition and diversity in semiarid ecosystems
	Miralles, I 1,2; Lazaro, R.3; Sanchez-Maranon, M.4; Soriano, M.1,2; Ortega, R.1,2
通讯作者	Miralles, I
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
卷号	709
英文摘要	Biocrusts are an important drylands landscape component, which enriches the upper millimeters of the soil with organic matter and initiates biogeochemical cycles. However, little is known about the influence of biocrusts on soil bacterial community structure and diversity. Different biocrust types representing a successional gradient were studied. This gradient, from the earliest to the latest successional stages, consisted of an incipient cyanobacterial biocrust < mature cyanobacterial biocrusts < biocrust dominated by the Squamarina lentigera and Diploschistes diacapsis lichens < Biocrust characterized by the Lepraria isidiata lichen. Moreover, in each biocrust type, four different percentages of biocrust cover were also selected. Soil diversity gradually increased with biocrust successional stage and percentage of biocrust cover. The biocrust cover had an important role in the total abundance of bacteria, generally increasing in soils colonized by the highest percentages of cover. Biocrust successional stage was the most important factor, significantly influencing 108 soil bacteria genera, whereas biocrust cover showed significant differences in only 10 genera. Principal Component Analysis showed contrasting microbial composition across the biocrust successional gradient. Some bacterial taxa were dominant in the soil colonized by different biocrust types. Thus, Leptolyngbya, Rubrobacter, Solirubrobacter, Geodermatophilus, etc., were more abundant in incipient cyanobacteria; Nostocales, Chroococcidiopsaceae, Coleofasciculaceae etc., under mature cyanobacterial biocrusts; Truepera, Sphingobacteriaceae, Actinophytocola, Kribella, etc., below the S. lentigera and D. diacapsis community, and Bryobacter, Ohtaekwangia, Opitutus, Pedosphaeraceae, etc., in soils colonized by L. isidiata. Several soil bacteria taxa showed significant correlations (p < 0.05) with chemical soil properties (pH, total nitrogen, total organic carbon, available phosphorous and electrical conductivity). We discuss the role of biocrusts influencing these chemical soil parameters, including the presence of certain metabolites secreted by biocrusts, and also their effects on soil moisture and several physical soil features, as well as their association with different microclimates, all of which could favor a more selective environment for certain bacteria. (C) 2019 Elsevier B.V. All rights reserved.
英文关键词	Microbial communities Lichen Cyanobacteria Illumina MiSeq Chemical soil properties Drylands
类型	Article
语种	英语
国家	Spain
收录类别	SCI-E
WOS记录号	WOS:000512281700007
WOS关键词	LICHEN-ASSOCIATED BACTERIA ; RAMAN-SPECTROSCOPY ; IN-SITU ; COMMUNITY STRUCTURE ; COLORADO PLATEAU ; CRUSTS ; RADIATION ; DESERT ; POLYSACCHARIDES ; AVAILABILITY
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315510
作者单位	1.Univ Almeria, Dept Agron, E-04120 Almeria, Spain; 2.Univ Almeria, Ctr Intens Mediterranean Agrosyst & Agrifood Biot, E-04120 Almeria, Spain; 3.CSIC, Expt Stn Arid Zones, Almeria, Spain; 4.Univ Granada, Dept Soil Sci & Chem Agr, E-18071 Granada, Spain
推荐引用方式 GB/T 7714	Miralles, I,Lazaro, R.,Sanchez-Maranon, M.,et al. Biocrust cover and successional stages influence soil bacterial composition and diversity in semiarid ecosystems[J],2020,709.
APA	Miralles, I,Lazaro, R.,Sanchez-Maranon, M.,Soriano, M.,&Ortega, R..(2020).Biocrust cover and successional stages influence soil bacterial composition and diversity in semiarid ecosystems.SCIENCE OF THE TOTAL ENVIRONMENT,709.
MLA	Miralles, I,et al."Biocrust cover and successional stages influence soil bacterial composition and diversity in semiarid ecosystems".SCIENCE OF THE TOTAL ENVIRONMENT 709(2020).