Does a decrease in microbial biomass alter mycorrhizal attributes and soil quality indicators in coal mining areas under revegetation process?

Vieira, Caroline Krug; Borges, Luiz Gustavo dos Anjos; Bortolini, Juliana Gress; Soares, Cláudio Roberto Fonsêca Sousa; Giongo, Adriana; Stürmer, Sidney Luiz

doi:10.1016/j.scitotenv.2021.149843

Cited by 6 publications

(5 citation statements)

References 79 publications

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“…The composition of bacteria and fungi changed with the increase of the reclamation years in this study. And the dominant bacterial phylum in this study was consistent with previous studies (Li et al, 2018; Vieira et al, 2022; Xiao et al, 2021). In addition, the change of the content of TN and AN in soil was consistent with the change of the relative abundance of Actinobacteria (Dai et al, 2018).…”

Section: Discussionsupporting

confidence: 92%

Effect of reclamation years on soil physical, chemical, bacterial, and fungal community compositions in an open‐pit coal mine dump in grassland area of Inner Mongolia, China

Sun

Gao

et al. 2023

Land Degrad Dev

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Understanding the process of changes in substrate physical, chemical, and biological properties is critical for vegetation ecosystem reconstruction of open‐pit coal mining dumps. However, the relationships of soil chemical, biological, bacterial, and fungal characteristics in open‐pit coal mining dumps in grassland area are still unclear. The purpose of this study is to understand the changes and relationships of soil physic‐chemical, bacterial, and fungal properties under the reclamation time series of open‐pit coal mining dumps. Soil samples were collected from the waste dump reclaimed after 2, 5, 10, and 15 years in Shengli West No. 2 open pit coal mine in Inner Mongolia, China, and the surrounding natural grassland was set as a control at 0–10 cm and 10–20 cm. Soil pH, electrical conductivity (EC), soil organic matter (SOM), nutrient properties, bacterial, and fungal community structures were measured in the waste dump reclaimed after 2, 5, 10, and 15 years. The results showed that soil pH was decreased at 0–20 cm in the waste dump while SOM was increased by 1.2 times in 0–10 cm reclaimed after 15 years than that after 2 years. Soil EC was decreased by 55.5% and 58.3%, respectively, in 0–10 cm and 10–20 cm, respectively, after 10 years than that after 2 years. Soil available nitrogen, available phosphorus, and available potassium were 97.8%, 13.2%, and 60.9% lower after 15 years' reclamation than those in control. The acid phosphatase in 0–10 cm and 10–20 cm was increased by 2.2 and 2.1 times, respectively, after 15 years compared with that after 2 years. Alkaline phosphatase was decreased by 16.8% reclaimed after 15 years than that after 2 years in 10–20 cm soil. The Shannon diversity index of fungi was increased by 42.0% and 43.8%, respectively, in 0–10 cm and 10–20 cm, in the waste dump reclaimed after 15 years than that after 2 years. Soil organic matter was positively correlated with soil urease activity. Soil pH, EC, and texture had different effects on bacterial and fungal communities. Therefore, appropriate measurements should be applied to the reclamation dumps to help the soil properties of reclamation areas to recover to the natural grassland.

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Section: Discussionsupporting

confidence: 92%

Effect of reclamation years on soil physical, chemical, bacterial, and fungal community compositions in an open‐pit coal mine dump in grassland area of Inner Mongolia, China

Sun

Gao

et al. 2023

Land Degrad Dev

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“…Additionally, the numbers of single-country publications (SCP) and multiple-country publications (MCP) were used to determine the level of international cooperation. China has the highest number of articles (666), the highest MCP (564), and the highest SCP (102). The collaboration network of 50 countries (Figure 4) publishing articles on LRER was drawn to demonstrate the status and level of cooperation between countries.…”

Section: Main Countries/regions Conducting Research On Lrermentioning

confidence: 99%

“…China has the highest number of articles (666), the highest MCP (564), and the highest SCP (102). The collaboration network of 50 countries (Figure 4) publishing articles on LRER was drawn to demonstrate the status and level of cooperation between countries.…”

Section: Main Countries/regions Conducting Research On Lrermentioning

confidence: 99%

“…For the heavy metal pollution in metal mine wasteland and tailings, the remediation of heavy metal pollution in soil by biochar is a current research hotspot [94,95]. For energy mines, such as coal mines, more attention is paid to terrain remodeling [100], soil profile reconstruction and improvement [4,101], revegetation [102][103][104], dynamic reclamation methods for subsidence band [105], and biodiversity [106], and that is why more articles on LRER are published in popular journals of environment and ecology. The CA and MCA of high-frequency keywords show that the current LRER research has two clusters, one is around heavy metal pollution (Cd, Pb, etc.…”

Section: Thematic Evolution Analysismentioning

confidence: 99%

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Progress of Mine Land Reclamation and Ecological Restoration Research Based on Bibliometric Analysis

Shao

Wei

2023

Sustainability

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The mining of mineral resources has caused serious damage to land and significant pressure on ecological environment. During the repairing of damaged land and degraded ecosystems, there have been many pieces of literature related to land reclamation and ecological restoration (LRER) that have emerged. To understand the progress and prospect of LRER research, it is necessary to sort out such pieces of literature, analyze the current research status, and forecast the future research directions. Here, Bibliometrix R-package was used to analyze 2357 articles, which were derived from the core database of Web of Science, to explore the development of LRER from 1990 to 2022. The results are as follows. (1) The annual scientific output results show that both the number of articles published on LRER and the number of articles annually citied were increasing gradually from 1990 to 2022. (2) High-frequency keyword analysis indicates that heavy metal (Cd, Pb) pollution remediation is a research hotspot. The cluster analysis (CA) and multiple correspondence analysis (MCA) show that there are two clusters in the current research of LRER, in which one surrounds heavy metal pollution and the other focuses on ecological restoration of mining areas. The two clusters correspond to the remediation and ecological restoration (rehabilitation) stages of stepwise ecological restoration, respectively. Thematic evolution analysis shows that, for more than 30 years, mine drainage and heavy metal pollution treatment, soil reconstruction (soil profile reconstruction, soil improvement), and vegetation restoration have been the focus of research. (3) Future research should focus on the relationship between mine ecological restoration and carbon sequestration and the relationship between ecological restoration and biodiversity in mine areas. In addition, LRER technology exchange, international cooperation, and industrialization are also main directions of development. Generally, in this study, metrology software (Bibliometrix R-package 3.1.4) from the literature was used to sort out the relevant literature on LRER over the past 30 years so as to provide reference for future research on LRER.

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“…The soil microbiome is impacted by human activities like agriculture, soil sealing and industrial emissions that cause environmental pollution (Roose-Amsaleg et al, 2001;Maron et al, 2011) due to the changes that these activities induce in the soil structure. Since anthropogenic activities have decreased biodiversity in soils, the assessment of the soil microbiome can be a crucial indicator of soil quality (Lehmann et al, 2020;Vieira et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Microbial Diversity of Reconstituted, Degraded, and Agricultural Soils Assessed by 16S rDNA Multi-Amplicon Sequencing

Maretto

Deb

Ravi

et al. 2022

Front. Environ. Sci.

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The microbial diversity is, among soil key factors, responsible for soil fertility and nutrient biogeochemical cycles, and can be modified upon changes in main soil physicochemical properties and soil pollution. Over the years, many restoration techniques have been applied to restore degraded soils. However, the effect of these approaches on soil microbial diversity is less understood and thus requires more investigation. In this study, we analyzed the impact, on soil microbial diversity of a patented novel technology, used to restore degraded soils. Soil samples were collected from three nearby sites located in Borgotrebbia, Piacenza, Italy, and categorized as reconstituted, degraded, and agricultural soils. After total soil DNA extraction, 16S rDNA multi-amplicon sequencing was carried out using an Ion GeneStudio S5 System to compare soils’ bacterial community profiles. Sequenced reads were processed to assign taxonomy and then key microbial community differences were identified across the sampling sites. Species diversity featured significant abatement at all rank levels in the degraded soil when compared to the agricultural control. The 5 year restoration technique showed full recovery of this index at the genus level but not at the phylum level, displaying a rank-dependent gradient of restored richness. In parallel, the abundance of genes involved in the nitrogen (N) biogeochemical cycle was assessed using quantitative Real-Time PCR (qPCR). Total DNA content was significantly higher (p < 0.05) in degraded (μ = 12.69 ± 2.58 μg g−1) and reconstituted (μ = 11.73 ± 1.65 μg g−1) soil samples when compared to the agricultural soil samples (μ = 2.39 ± 0.50 μg g−1). The taxonomic diversity of each soil site was significantly different, with some instances unique of the agricultural soil even at the phylum level. The analysis of N functional genes showed that the relative abundance of bacterial amoA (p < 0.05) and nosZ (p < 0.01) genes were significantly lower in the agricultural than in the reconstituted and degraded soils. We concluded that the application of the soil reconstitution technique appears to enhance the active microbial community, with distinct diversity and functionality towards genes involved in N biogeochemical cycle, as compared to both the degraded and the agricultural soil.

show abstract

Does a decrease in microbial biomass alter mycorrhizal attributes and soil quality indicators in coal mining areas under revegetation process?

Cited by 6 publications

References 79 publications

Effect of reclamation years on soil physical, chemical, bacterial, and fungal community compositions in an open‐pit coal mine dump in grassland area of Inner Mongolia, China

Effect of reclamation years on soil physical, chemical, bacterial, and fungal community compositions in an open‐pit coal mine dump in grassland area of Inner Mongolia, China

Progress of Mine Land Reclamation and Ecological Restoration Research Based on Bibliometric Analysis

Microbial Diversity of Reconstituted, Degraded, and Agricultural Soils Assessed by 16S rDNA Multi-Amplicon Sequencing

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