Ecological restoration alters microbial communities in mine tailings profiles

Li, Yang; Jia, Zhongjun; Sun, Qiang; Zhan, Jing; Yang, Yang; Wang, Dan

doi:10.1038/srep25193

Cited by 60 publications

(43 citation statements)

References 59 publications

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“…In the revegetation area, plant litter and root exudate contributed a large amount of organic nitrogen (Baxendale et al, 2014;Thion et al, 2016), and the inorganic nitrogen mineralized by this organic nitrogen was provided to plants and microbes (Thion et al, 2016). In the area revegetated by C. zizanioides, the phytocommunity obtained the inorganic nitrogen in the process of nitrogen transformation and grew well, but the TN in the tailings experienced no improvement compared to the bare wastelands assayed in our previous study (Li et al, 2016a). In contrast, plant-derived C from I. cylindrica stimulated the activity of nitrogen fixing bacteria.…”

Section: Discussionmentioning

confidence: 96%

Plant-Mediated Changes in Soil N-Cycling Genes during Revegetation of Copper Mine Tailings

Jia

Sun

et al. 2017

Front. Environ. Sci.

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Nitrogen limitation represents a major bottleneck during the revegetation of mine tailings. However, controls over key nitrogen-cycling genes in rhizospheric soils under differential vegetation management remain poorly understood. The abundance and transcriptional activity of nitrogen-cycling genes and the enzymatic activity of nitrogen transformation are mediated differentially during revegetation of mine tailings by Imperata cylindrica and Chrysopogon zizanioides plants. Results showed that the highest total organic carbon (TOC), total nitrogen (TN), and NH + 4 -N contents were found in the rhizosphere of I. cylindrica. The nifH gene abundances differed between I. cylindrica and C. zizanioides, and were higher in I. cylindrica which demonstrated by 3.39-fold higher mRNA transcript abundance of the nifH gene and a 2.15-fold higher nitrogen fixation rate in the rhizosphere. In addition, C. zizanioides exhibited a 4.94-fold higher transcript abundance of the archaeal amoA gene and the highest nitrification rate (1.706 ± 0.293 µg N-NO − 2 g −1 h −1 ) in the rhizosphere. In conclusion, I. cylindrica and C. zizanioides stimulated the abundances and activities of nifH gene and archaeal amoA gene, respectively. In addition, I. cylindrica appears to be capable of enhancing nitrogen fixation and exhibited accelerated nitrogen accumulation, which may be particularly useful for the rehabilitation of mine tailings.

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Section: Discussionmentioning

confidence: 96%

Plant-Mediated Changes in Soil N-Cycling Genes during Revegetation of Copper Mine Tailings

Jia

Sun

et al. 2017

Front. Environ. Sci.

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“…A similar result was also reported by Li et al [9] who found that the addition of native soil to Cu-Pb-Zn tailings significantly changed the composition and structure of microbial communities. Therefore, incorporation of amendments may fast-track the establishment of microbial community and initiate the rehabilitation of biogeochemical process of mine soils [2,9].…”

Section: Discussionmentioning

confidence: 99%

“…Mining can transform fertile, cultivated land into unfertile land. One way is by altering the structural and function of the soil microbial community [1,2]. Remediation of mine wastelands is one of the pressing needs to be addressed for social and economic development to be healthy and sustainable.…”

Section: Introductionmentioning

confidence: 99%

Effects of Amendments on Soil Microbial Diversity, Enzyme Activity and Nutrient Accumulation after Assisted Phytostabilization of an Extremely Acidic Metalliferous Mine Soil

et al. 2019

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Current criteria for successful phytostabilization of metalliferous mine wastelands have paid much attention to soil physico-chemical properties and vegetation characteristics. However, it remains poorly understood as to how the soil microbial community responds to phytostabilization practices. To explore the effects of amendments on the microbial community after assisted phytostabilization of an extremely acidic metalliferous mine soil (pH < 3), a pot experiment was performed in which different amendments and/or combinations including lime, nitrogen-phosphorus-potassium (NPK) compound fertilizer, phosphate fertilizer and river sediment were applied. Our results showed the following: (1) The amendments significantly increased soil microbial activity and biomass C, being 2.6–4.9 and 1.9–4.1 times higher than those in the controls, respectively. (2) The activities of dehydrogenase, cellulase and urease increased by 0.9–7.5, 2.2–6.8 and 6.7–17.9 times while acid phosphatase activity decreased by 58.6%–75.1% after the application of the amendments by comparison with the controls. (3) All the amendments enhanced the nutrient status of the mine soil, with organic matter, total nitrogen and total phosphorus increased by 5.7–7.8, 3.1–6.8 and 1.1–1.9 times, relative to the mine soil. In addition, there were strong positive correlations between soil microbial community parameters and nutrient factors, suggesting that they were likely to be synergistic. From an economic view, the combination of lime (25 t ha−1) and sediment from the Pearl River (30%) was optimal for functional rehabilitation of the microbial community in the extremely acidic metalliferous mine soil studied.

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“…Previous studies showed that the soil microbial community changed markedly after ecological restoration (Li et al, 2016;Yan et al, 2018). The results from Li et al (2016) have shown that significant differences existed in the relative abundance of bacteria in some phyla after restoration. Yan et al (2018) observed that a dramatic shift in the fungal community toward that of the natural fungal community occurred after only 10 years of active native plant revegetation.…”

Section: Introductionmentioning

confidence: 99%

“…Microorganisms (bacteria and fungi) may serve as possible bio-indicators for monitoring soil ecosystem functions in close association with changes in the physicochemical and biological conditions during the ecological restoration of degraded areas (Mendez, García, Maestre, & Escudero, 2008;Wang et al, 2012). Previous studies showed that the soil microbial community changed markedly after ecological restoration (Li et al, 2016;Yan et al, 2018). The results from Li et al (2016) have shown that significant differences existed in the relative abundance of bacteria in some phyla after restoration.…”

Section: Introductionmentioning

confidence: 99%

Revegetation by sowing reduces soil bacterial and fungal diversity

Wang

Zhang

Zhao

et al. 2019

Ecology and Evolution

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Aim:The aim of this study was to understand the effects of revegetation on the diversity of bacteria and fungi in soil by sowing a single species and exploring the underlying mechanism.Location: Beijing, China. Taxon: Plants and Microbes.Methods: In a short-term ecological restoration experiment, one natural recovery treatment and three seed sowing treatments were chosen to assess their effects on the alteration of fungal and bacterial diversity. Plant species richness, abundance, and height were investigated. The diversity of fungi and bacteria was analyzed by high-throughput sequencing technologies. Linear mixed-effects model analysis was used to examine the effects of different restoration methods on biodiversity and ecosystem functions. Pearson's correlation analysis, analysis of covariance, and structural equation modeling (SEM) were used to examine the relationship between biodiversity and environmental factors. Results: Species richness and the Shannon-Wiener Index (H′) of plants in the sown treatments were lower than in the natural recovery treatment, especially with sowing of Medicago sativa L. Similarly, the sum of the observed species and H′ of fungi and bacteria significantly decreased in the sown treatments. Moreover, plant density, community coverage, and soil moisture increased markedly, while soil bulk density decreased in the sown treatments. Importantly, SEM showed that sown treatments reduced the diversity of plants through increasing plant density, while it decreased the diversity of fungi and bacteria through decreasing the plant diversity and increasing soil moisture.Main conclusions: Our findings confirm that ecological restoration by sowing could improve soil conditions, but may be unfavorable to the amelioration of soil microbial diversity in the short-term. Restoration practitioners should consider long-term studies on the dynamics of biodiversity in the above-and belowground after revegetation by native species to achieve goals related to biodiversity conservation.

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Ecological restoration alters microbial communities in mine tailings profiles

Cited by 60 publications

References 59 publications

Plant-Mediated Changes in Soil N-Cycling Genes during Revegetation of Copper Mine Tailings

Plant-Mediated Changes in Soil N-Cycling Genes during Revegetation of Copper Mine Tailings

Effects of Amendments on Soil Microbial Diversity, Enzyme Activity and Nutrient Accumulation after Assisted Phytostabilization of an Extremely Acidic Metalliferous Mine Soil

Revegetation by sowing reduces soil bacterial and fungal diversity

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