Bacterial diversity in response to direct revegetation in the Pb–Zn–Cu tailings under subtropical and semi-arid conditions

Li, Xiaofang, Huang, Longbin, Bond, Philip L., Lu, Yang and Vink, Sue (2014) Bacterial diversity in response to direct revegetation in the Pb–Zn–Cu tailings under subtropical and semi-arid conditions. Ecological Engineering, 68 233-240. doi:10.1016/j.ecoleng.2014.03.044


Author Li, Xiaofang
Huang, Longbin
Bond, Philip L.
Lu, Yang
Vink, Sue
Title Bacterial diversity in response to direct revegetation in the Pb–Zn–Cu tailings under subtropical and semi-arid conditions
Journal name Ecological Engineering   Check publisher's open access policy
ISSN 0925-8574
1872-6992
Publication date 2014-07-01
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.ecoleng.2014.03.044
Open Access Status Not yet assessed
Volume 68
Start page 233
End page 240
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Abstract The development of soil microbial communities is essential for the sustainability of plant communities established for tailings phytostabilization. To explore the effect of revegetation on microbial diversity in mine tailings under subtropical and semi-arid climatic conditions (situated at north Queensland), com- munity composition was compared in Pb–Zn–Cu tailings with and without revegetation. 16S rRNA gene based pyrosequencing with universal primers was applied for microbial community profiling. Bacterial diversity, as indicated by both the OTU number and Shannon index, of the revegetated samples was sub- stantially higher than that of the pure tailings sample. Species within known radiation-tolerant genera dominated both the pure (mainly Rubrobacter ) and the revegetated tailings (mainly Truepera ). At the phy- lum level, Proteobacteria and Bacteroidetes were remarkably higher in the revegetated samples compared to pure tailings; this is possibly related to the change in organic carbon pool. Phylotypes belonging to Thiobacillus were found thriving in the revegetated tailings. This may partly account for the accelerated weathering observed in these areas. Overall, this study found that plant establishment greatly increased microbial diversity in the neutral-alkaline tailings. However, the efficacy of the 2-year revegetation in regards to microbial structure is limited considering that the bacterial communities were still dominated by tolerant species and had much lower -diversity than those reported for natural soils. This suggests that new amendment strategies are required to rehabilitate functional microbial communities in the tailings.
Keyword Microbial Diversity
Mine tailings
Phytostabilization
Pyrosequencing
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID ECR122
Institutional Status UQ
Additional Notes Available online 4 May 2014

 
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Created: Mon, 05 May 2014, 21:05:38 EST by Xiaofang Li on behalf of Centre For Mined Land Rehabilitation