Effects of agronomic treatments on functional diversity of soil microbial community and microbial activity in a revegetated coal mine spoil

Shrestha, Pramod; Gautam, R. C.; Ashwath, Nanjappa

doi:10.1016/j.geoderma.2018.11.038

Cited by 49 publications

(19 citation statements)

References 51 publications

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“…Rhizosphere bacteria can support natural vegetation restoration by regulating biogeochemical processes, which can further help to improve the physical and chemical properties of rhizosphere soil (Mishra, Singh & Arora., 2017). Our present study observed that the beta diversity index of rhizosphere microbial community varied with different restoration stages, Other studies have also observed that the establishment and development of plant communities could alter rhizosphere bacterial beta diversity (Sun et al, 2018;Shrestha, Gautam & Ashwath, 2019). Different from the change of beta diversity, the alpha diversity (the Chao 1 index, Simpson index, Shannon index and Pielou index) under different restoration stages had various changes.…”

Section: Discussionsupporting

confidence: 50%

Changes in diversity and composition of rhizosphere bacterial community during natural restoration stages in antimony mine

Duan

Lin

Zhang

et al. 2021

PeerJ

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Background Open pit antimony (Sb) mining causes serious soil pollution, and phytoremediation is a low-cost approach to remediate heavy metal contaminated soil. Rhizosphere bacteria play an important role in ecological restoration in mining areas. There is a knowledge gap on how to find suitable rhizosphere microorganisms to improve the phytoremediation effect. Understanding the differences of rhizosphere bacterial diversity in different restoration stages is helpful to find suitable bacteria for ecological restoration. Methods A method of the substitution of “space” for “time” was used to study the effect of natural restoration on rhizosphere bacterial community. According to the dominant vegetation types (herb, shrub, and tree) in the natural restoration area of Sb mining, the early restoration (ER), middle restoration (MR), and later restoration (LR) from the largest Sb mine (Xikuangshan mine) in the world were selected to evaluate the differences in the composition and diversity of rhizosphere bacteria during three natural restoration stages. Each restoration stage had five samples. To determine the relationship between restoration stages and bacterial diversity in the rhizosphere, high throughput sequencing of PCR amplified were used. Results Alpha diversity, as assessed by Chao indices, appeared lowest in ER but this trend was not seen with other diversity metrics, including the Simpson and Shannon. Beta diversity analysis suggested there were differences in rhizobacterial community structure associate with restoration stage. At the phylum level, natural restoration led to a significant increase in the relative abundance of Actinobacteria in the MR, and a significant decrease in the relative abundance of Patescibacteria in the LR. Additionally, Calditrichaeota, Deferribacteres and Epsilonbacteraeota were only found in ER. At the genus level, the relative abundance of RB41 and Haliangium were highest in LR plots, while that of Bacillus and Gaiella were highest in ER plots. Additionally, the Azorhizobium genus was only detected in the ER phase. Overall, our findings suggested that several rhizosphere microbial communities had significant differences among three natural restoration stages (ER, MR, and LR) and the rhizosphere bacterial communities mainly appeared in the early restoration stage can be preferred for remediation of pollution soil in Xikuangshan.

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Section: Discussionsupporting

confidence: 50%

Changes in diversity and composition of rhizosphere bacterial community during natural restoration stages in antimony mine

Duan

Lin

Zhang

et al. 2021

PeerJ

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“…Maximum accumulation of OC was observed in Azotobacter+ OM+ NPK 50% treatment followed by Azospirillum + OM + NPK 50% and AMF+ OM+ NPK 50%. The results are in line with the previous studies showed that, soil organic carbon of coal mine increased after inoculation with AMF (Qian et al, 2012) and organic matter (Shrestha et al, 2019). This enhancement was due to the accumulation of organic matter in the mine soil, which has accelerated organic carbon production.…”

Section: Enzymatic Activitiessupporting

confidence: 92%

Guar (Cyamopsis tetragonoloba L.): A Potential Candidate for the Rehabilitation of Feldspar Mine Spoil Amended with Bioinoculants

Junia

Kasana

Jain

et al. 2020

IJARe

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Excessive feldspar mining is becoming an alarming issue due to the untreated mine spoil. For the success in the remediation of mine spoil, selection of plant species is an important factor. Therefore being a nitrogen fixer, legumes can be an alternative and are needed to be broadcasted for the rehabilitation of mined lands. In this context guar (Cyamopsis tetragonoloba L.) can be preferred which excels in enhancing soil fertility and is already in cultivation but not experimented with feldspar due to not establishing its rhizosphere fertility. In this study to enhance the fertility status and biological activities of feldspar mine spoil plantation of guar is done with the inoculation of microbes Azotobacter Azospirillum and Glomus mosseae (AMF) and organic and inorganic amendments. This attempt has successfully enhanced the rhizosphere enzymes at the rate of 10-65% maximum with AMF+ OM+ NPK50% (T16), nutrient uptake 10-70% maximum with Azotobacter+ OM+ NPK 50% (T7) and plant metabolites 10-51% also observed maximum with T7 over the uninoculated control. Guar has also shown positive response towards the applied treatment and grown well. Based on the results it can be inferred that guar can tolerate detrimental effects of feldspar mining. Hence, it is concluded that guar can be a potential crop to restore soil health of feldspar mined land for sustainable development.

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“…As a consequence, the dynamic assemblages of soil bacterial communities have evolved different strategies in response to changes in environmental conditions, such as soil pH, nutrient contents and vegetation type (Ding et al ., 2017). For this reason, soil bacterial community composition and abundance have become increasingly important indicators of soil quality more generally (Schloter et al ., 2018), as well as more specifically in the context of land degradation and restoration (Shrestha et al ., 2019). Soil microorganisms and nutrients change greatly after restoration, varying from vegetation patterns (Guo et al ., 2019).…”

Section: Introductionmentioning

confidence: 99%

Vegetation richness, species identity and soil nutrients drive the shifts in soil bacterial communities during restoration process

Liu

Zhu

et al. 2020

Environ Microbiol Rep

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Soil bacteria play an essential role in functioning of ecosystems and maintaining of biogeochemical cycles. However, little is known about changes in the compositions and functional groups of soil bacterial communities during different restoration stages. The influences of aboveground vegetation and belowground soil properties on soil bacterial communities were also unclear during this process. Here we sequenced the soil bacterial communities in different stages of sand fixation. Sand fixation increased the diversity of the bacterial communities, among which the populations of Actinobacteria, Acidobacteria and Gemmatimonadetes changed significantly. The function prediction showed sand fixation increased Gram-positive and aerobic bacteria. Bacterial structure is significantly correlated with plant richness, coverage and biomass. In particular, we found species identity was an important determinant in structuring bacterial composition. Soil properties were all significantly correlated with soil bacterial community richness and diversity. Fusobacteria was strongly positively correlated with sand, Chloroflexi with total N and Gemmatimonadetes with SOM and total C. It suggested that soil nutrients (TC, TN and SOM) have large consequences for soil bacterial community dissimilarities. These results indicated that vegetation richness, especially species identity, together with improvement in soil nutrients, play key roles in driving the shifts in soil microbial community structure and function during restoration process.

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Effects of agronomic treatments on functional diversity of soil microbial community and microbial activity in a revegetated coal mine spoil

Cited by 49 publications

References 51 publications

Changes in diversity and composition of rhizosphere bacterial community during natural restoration stages in antimony mine

Changes in diversity and composition of rhizosphere bacterial community during natural restoration stages in antimony mine

Guar (Cyamopsis tetragonoloba L.): A Potential Candidate for the Rehabilitation of Feldspar Mine Spoil Amended with Bioinoculants

Vegetation richness, species identity and soil nutrients drive the shifts in soil bacterial communities during restoration process

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