Arid
DOI10.1016/j.catena.2016.07.008
Differentiation of microbial activity and functional diversity between various biocrust elements in a heterogeneous crustal community
Li, Hua1; Li, Renhui1; Rossi, Federico2; Li, Dunhai1; De Philippis, Roberto2,3; Hu, Chunxiang1; Liu, Yongding1
通讯作者Liu, Yongding
来源期刊CATENA
ISSN0341-8162
EISSN1872-6887
出版年2016
卷号147页码:138-145
英文摘要

Biological soil crusts (BSCs) dominate the interspace between sparse vegetation in arid and cold environments worldwide and fulfill diverse ecosystem functions. Natural BSCs are usually classified as a series of stepwise successional stages along with a gradual improvement of biological properties and micro-environmental conditions. However, the effects of spatial heterogeneity on the ecological traits of BSCs remain largely unknown, especially in the microbial scenario. In this study, three adjacent biocrust elements with different successional levels (cyanobacterial, lichen, and moss crusts) were collected from a continuous and heterogeneous crustal community at small scale (centimetre level) in the Gurbantiinggiit Desert, aiming to distinguish the alteration of microbial distribution and functional traits among them. The catabolic fingerprint of sole-carbon induced respiration was measured by MicroResp (TM) respiration system to calculate the functional diversity indices. Ribosomal copy numbers of different soil microbes (bacteria, fungi, and phototrophs), as a proxy for microbial relative abundance, were analysed through quantitative PCR methods. We also evaluated the related physicochemical parameters. The results show evidences that the microbial abundances and functional traits associated with each biocrust element are inconsistent with its successional level. Although higher microbial activities and more benign soil conditions (increased soil moisture and organic matter) were still found in well-developed moss crust, higher microbial abundances (except fungi) and enhanced functional diversity were observed in less-developed cyanobacterial crust. Spatial heterogeneity due to the jigsaw-like pattern of various biocrust elements partly affects microbial performances in BSCs. More studies focusing on quantitatively measuring spatial arrangement of biocrust elements are needed to clarify the mechanisms underlying to functional differentiation in crustal communities. (C) 2016 Elsevier B.V. All rights reserved.


英文关键词Biological soil crusts Crust development Community-level physiological profile Soil microorganisms Substrate-induced respiration
类型Article
语种英语
国家Peoples R China ; Italy
收录类别SCI-E
WOS记录号WOS:000385598800014
WOS关键词BIOLOGICAL SOIL CRUSTS ; 16S RIBOSOMAL-RNA ; NEGEV DESERT ; GURBANTUNGGUT DESERT ; COLORADO PLATEAU ; PHYSIOLOGICAL PROFILES ; SPATIAL-DISTRIBUTION ; NITROGEN-FIXATION ; SAND DUNES ; CHINA
WOS类目Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向Geology ; Agriculture ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/192011
作者单位1.Chinese Acad Sci, Inst Hydrobiol, CAS Key Lab Algal Biol, Wuhan 430072, Peoples R China;
2.Univ Florence, Dept Agrifood Prod & Environm Sci, I-50144 Florence, Italy;
3.CNR, Inst Ecosyst Study, Sesto Fiorentino, Italy
推荐引用方式
GB/T 7714
Li, Hua,Li, Renhui,Rossi, Federico,et al. Differentiation of microbial activity and functional diversity between various biocrust elements in a heterogeneous crustal community[J],2016,147:138-145.
APA Li, Hua.,Li, Renhui.,Rossi, Federico.,Li, Dunhai.,De Philippis, Roberto.,...&Liu, Yongding.(2016).Differentiation of microbial activity and functional diversity between various biocrust elements in a heterogeneous crustal community.CATENA,147,138-145.
MLA Li, Hua,et al."Differentiation of microbial activity and functional diversity between various biocrust elements in a heterogeneous crustal community".CATENA 147(2016):138-145.
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