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Biogeosciences An interactive open-access journal of the European Geosciences Union
doi:10.5194/bg-2017-139
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
18 Apr 2017
Review status
This discussion paper is under review for the journal Biogeosciences (BG).
Development of bacterial communities in biological soil crusts along a revegetation chronosequence in the Tengger Desert, northwest China
Lichao Liu1, Yubing Liu1,2, Peng Zhang1, Guang Song1, Rong Hui1, and Jin Wang1,2 1Shapotou Desert Research & Experiment Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China
2Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province, Northwest Institute of Eco–Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
Abstract. Knowledge of structure and function of microbial communities in different successional stages of biological soil crusts (BSCs) is still scarce for desert areas. In this study, Illumina MiSeq sequencing was used to assess the composition changes of bacterial communities in different ages of BSCs in the revegetation of Shapotou in the Tengger Desert. The most dominant phyla of bacterial communities shifted with the changed types of BSCs in the successional stages, from Firmicutes in mobile sand and physical crusts to Actinobacteria and Proteobacteria in BSCs, and the most dominant genera shifted from Bacillus, Enterococcus and Lactococcus to RB41_norank and JG34-KF-361_norank. Alpha diversity and quantitative real-time PCR analysis indicated that bacteria richness and abundance reached their highest levels after 15 years of BSC development. Redundancy analysis showed that soil pH, silt content and carbon:nitrogen ratio were closely related to the bacterial communities of BSCs. The results suggested that bacterial communities of BSCs recovered quickly with the improved soil physicochemical properties in the early stages of BSC succession. Change in the bacterial community structures may be an important indicator in the biogeochemical cycling and nutrient storage in early successional stages of BSCs in desert ecosystems.

Citation: Liu, L., Liu, Y., Zhang, P., Song, G., Hui, R., and Wang, J.: Development of bacterial communities in biological soil crusts along a revegetation chronosequence in the Tengger Desert, northwest China, Biogeosciences Discuss., doi:10.5194/bg-2017-139, in review, 2017.
Lichao Liu et al.
Lichao Liu et al.
Lichao Liu et al.

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Short summary
We studied the development process of bacterial community structure of BSCs along a revegetation chronosequence in temperate desert. Our results indicated that: (1) Shift of bacterial composition related to their function in crust development process; (2) Bacterial diversity and richness were consistent with the recovery of soil properties; (3) Bacteria are key microorganisms in biogeochemical cycling in early stages of BSCs.
We studied the development process of bacterial community structure of BSCs along a ...
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