Soil Characteristics and Microbial Responses in Post-Mine Reclamation Areas in a Typical Resource-Based City, China

Tan, Min; Zhou, Xiaodan; Li, Gang; Ge, Mengyu; Chen, Zhuang; Qu, Jianhua

doi:10.3846/jeelm.2021.15138

Cited by 5 publications

(5 citation statements)

References 54 publications

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“…A study by Ahirwal et al 51 clearly demonstrates that SOC sequestration in reclaimed mine soils behaves similarly to initial pedogenesis. This is further supported by Tan et al 52 , who observed a minor increase in SOC content of 0.17% in the first year of coal mine recultivation, and also in agreement with the results of Bodlák et al 52 . We, therefore, include studies that lack values at the beginning of reclamation but contain values after one year.…”

Section: Methodssupporting

confidence: 90%

Effects of recultivation on soil organic carbon sequestration in abandoned coal mining sites: a meta-analysis

Baier

Modersohn

Jalowy

et al. 2022

Sci Rep

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Opencast coal mining results in high loss of soil organic carbon (SOC), which may be restored via recultivation. Common strategies include liming, topsoil application, and phytoremediation. It remains unclear, however, which parameters determine the effectiveness of these varying recultivation strategies especially regarding SOC sequestration. This meta-analysis analyses the effect of varying recultivation strategies on SOC sequestration under different climate and soil conditions (pH, texture, depth) as well as in relation to time, based on 404 data entries from 51 studies. All included climatic regions recorded increases in SOC stocks, with tropical soils showing the highest potential for relative gains at up to 637%. We demonstrate that loamy soils sequester twice as much newly introduced SOC than sand. Strategy-wise, the highest mean rate of SOC sequestration is achieved by forest after topsoil application (3.9 Mg ha−1 a−1), agriculture after topsoil application (2.3 Mg ha−1 a−1), and agriculture with topsoil and fertiliser application (1.9 Mg ha−1 a−1) with a response ratio of 304%, 281%, and 218%, respectively. Soils analysed to less then 40 cm depth show higher SOC sequestration rates (< 10 cm: 0.6 Mg ha−1 a−1, < 20 cm: 1.0 Mg ha−1 a−1, and 20–40 cm: 0.4 Mg ha−1 a−1; response ratio of 123%, 68%, and 73%, respectively) than those analysed to a depth of 41–80 cm (0.1 Mg ha−1 a−1; response ratio of 6%). In terms of pH, strongly acidic soils (pH < 4.5) and alkaline conditions (pH > 7) offer the most beneficial environment for SOC sequestration at 0.4 Mg ha−1 a−1 and 0.8 Mg ha−1 a−1, respectively (185% and 273% response). Given comparable SOC sequestration potentials of forest after topsoil application, agriculture without amendments, and forest without amendments, we recommend to weigh these strategies against each other. Potentially decisive aspects are short- vs. long-term economic gains, food security concerns, and—in case of agriculture—the risk of overintensification leading to losses in SOC. Our data suggests that amendments exert considerable influence on SOC sequestration and need to be introduced under careful consideration.

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Section: Methodssupporting

confidence: 90%

Effects of recultivation on soil organic carbon sequestration in abandoned coal mining sites: a meta-analysis

Baier

Modersohn

Jalowy

et al. 2022

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The study clearly demonstrates that SOC sequestration in reclaimed mine soils behaves similarly to initial pedogenesis. This is further supported by Tan et al 52 , who observed a minor increase in SOC content of 0.17% in the rst year of coal mine recultivation, and also in agreement with the results of Bodlák et al 52 . We, therefore, decided to include studies that lack values at the beginning of reclamation but contain values after one year.…”

Section: Data Source Collection and Categorisationsupporting

confidence: 90%

Effects of recultivation on soil organic carbon sequestration in abandoned coal mining sites: a meta-analysis

Baier

Modersohn

Jalowy

et al. 2022

Preprint

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Opencast coal mining results in high loss of soil organic carbon (SOC), which may be restored via recultivation. Common methods include liming, topsoil application, and phytoremediation. It remains unclear, however, which parameters determine the effectiveness of varying recultivation strategies especially regarding SOC sequestration. We, therefore, analysed the relationship between SOC stock changes in abandoned coal mines and the recultivation method, soil properties (pH, texture, depth), climate, and time under recultivation in 51 studies (404 data entries). All included climatic regions recorded increases in SOC stocks, with tropical soils showing the highest potential for relative gains of up to 468%. With respect to soil texture, clay content is the main factor promoting SOC sequestration. Strategy-wise, the largest positive effect was achieved by forest with liming (1.5 Mg ha− 1 a− 1), fallow after topsoil and fertiliser addition (1.1 Mg ha− 1 a− 1), agriculture after topsoil addition (1.0 Mg ha− 1 a− 1), and forest with fertiliser (1.0 Mg ha− 1 a− 1) with a response ratio of 35%, 58%, 140%, and 48%, respectively. Soil depths < 10 cm, < 20 cm, and 21–40 cm stored more SOC (0.6 Mg ha− 1 a− 1, 1.0 Mg ha− 1 a− 1, and 0.4 Mg ha− 1 a− 1; response ratio of 123%, 68%, and 73%, respectively) than soils at a depth of 41–80 cm (0.1 Mg ha− 1 a− 1; response ratio of 6%). In terms of pH, strongly acidic soils (pH < 4.5) and alkaline conditions (pH > 7) offered the most beneficial environment for SOC sequestration at 0.4 Mg ha− 1 a− 1 and 0.8 Mg ha− 1 a− 1, respectively (44% and 67% response).

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“…The reclamation of areas disturbed by coal mining to promote an accelerated improvement in soil ecosystems represents an effective approach for achieving sustainable land-use development. Subsequent to the reclamation of disturbed land in mining areas [61,62], the growth and development of microbial communities in the soil is promoted, and some studies have shown that the post-reclamation abundance of soil microbial communities is significantly different from that of soil undergoing natural recovery [34].…”

Section: Microbial Community Composition and Structure Analysismentioning

confidence: 99%

“…An assessment of the microbial community structure of coal mine lands and other relevant indicators has revealed that under conditions where the microbial community structure is compromised, this can impair the associated material cycling of the soil and the ecosystem sustainability [30]. Other studies have revealed that there are differences in microbial abundance, diversity, and function between reclaimed soils and naturally restored soils in sinkholes [31][32][33][34], and that microbial community composition and ecosystem sustainability can be restored to a state approximating that of natural soil over time with reclamation [32]. The complexity of the interactions between microbial communities and their compositional structure have therefore been used to assess the efficacy of restoration subsequent to land reclamation [29].…”

Section: Introductionmentioning

confidence: 99%

Differential Response of Soil Microbial Community Structure in Coal Mining Areas during Different Ecological Restoration Processes

Guo¹,

2022

Processes

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Micro-organisms play important roles in promoting soil ecosystem restoration, but much of the current research has been limited to changes in microbial community structure in general, and little is known regarding the more sensitive and indicative microbial structures or the responses of microbial diversity to environmental change. In this study, based on high-throughput sequencing and molecular ecological network analyses, the structural characteristics of bacterial communities were investigated in response to four different ecological restoration modes in a coal mining subsidence area located in northwest China. The results showed that among soil nutrients, nitrate-nitrogen and fast-acting potassium were the most strongly associated with microbial community structure under different ecological restoration types. Proteobacteria, Actinobacteria, and Acidobacteria were identified as important phyla regarding network connectivity and structural composition. The central natural recovery zone was found to have the smallest network size and low complexity, but high modularity and good microbial community stability. Contrastingly, a highly complex molecular ecological network of soils in the photovoltaic economic zone existed beneath the photovoltaic modules, although no key species, strong bacterial competition, poor resistance to disturbance, and a significant increase in the relative abundance of Gemmatimonadetes were found. Furthermore, the reclamation zone had the highest soil nutrient content, the most complex network structure, and the most key and indicator species; however, the ecological network was less stable and readily disturbed.

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Soil Characteristics and Microbial Responses in Post-Mine Reclamation Areas in a Typical Resource-Based City, China

Cited by 5 publications

References 54 publications

Effects of recultivation on soil organic carbon sequestration in abandoned coal mining sites: a meta-analysis

Effects of recultivation on soil organic carbon sequestration in abandoned coal mining sites: a meta-analysis

Effects of recultivation on soil organic carbon sequestration in abandoned coal mining sites: a meta-analysis

Differential Response of Soil Microbial Community Structure in Coal Mining Areas during Different Ecological Restoration Processes

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