Effects of ultramafic topsoil stockpiling during mine activities on its microbial diversity and other microbiological and physicochemical characteristics

Amir, Hamid; Bordez, Laurent; Cavaloc, Yvon; Jourand, Philippe; Ducousso, Marc; Juillot, Farid

doi:10.1016/j.ecoleng.2022.106563

Cited by 6 publications

(3 citation statements)

References 74 publications

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“…In addition, the effects of heavy metals on the sporulation process of AMF may depend on other environmental factors ( Yang et al, 2015 ). In this study, it was found that the AMF spore density was positively correlated with AN, and TOC ( Figures 5A , 7 ), which is consistent with the results of previous studies ( Bhat et al, 2014 ; de Araujo Pereira et al, 2018 ; Amir et al, 2022 ). It is generally believed that the AMF spore density is positively correlated with soil nitrogen and organic matter when the soil nutrient content is low ( Moradi et al, 2017 ).…”

Section: Discussionsupporting

confidence: 92%

Arbuscular mycorrhizal fungi community analysis revealed the significant impact of arsenic in antimony- and arsenic-contaminated soil in three Guizhou regions

et al. 2023

Front. Microbiol.

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IntroductionThe lack of systematic investigations of arbuscular mycorrhizal fungi (AMF) community composition is an obstacle to AMF biotechnological applications in antimony (Sb)- and arsenic (As)-polluted soil.MethodsMorphological and molecular identification were applied to study the AMF community composition in Sb- and As-contaminated areas, and the main influencing factors of AMF community composition in Sb- and As-contaminated areas were explored.Results(1) A total of 513,546 sequences were obtained, and the majority belonged to Glomeraceae [88.27%, 193 operational taxonomic units (OTUs)], followed by Diversisporaceae, Paraglomeraceae, Acaulosporaceae, Gigasporaceae, and Archaeosporaceae; (2) the affinity between AMF and plants was mainly related to plant species (F = 3.488, p = 0.022 < 0.050), which was not significantly correlated with the total Sb (TSb) and total As (TAs) in soil; (3) the AMF spore density was mainly related to the available nitrogen, available potassium, and total organic carbon; (4) The effect of soil nutrients on AMF community composition (total explanation: 15.36%) was greater than that of soil Sb and As content (total explanation: 5.80%); (5) the effect of TAs on AMF community composition (λ = −0.96) was more drastic than that of TSb (λ = −0.21), and the effect of As on AMF community composition was exacerbated by the interaction between As and phosphorus in the soil; and (6) Diversisporaceae was positively correlated with the TSb and TAs.DiscussionThe potential impact of As on the effective application of mycorrhizal technology should be further considered when applied to the ecological restoration of Sb- and As-contaminated areas.

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Section: Discussionsupporting

confidence: 92%

Arbuscular mycorrhizal fungi community analysis revealed the significant impact of arsenic in antimony- and arsenic-contaminated soil in three Guizhou regions

et al. 2023

Front. Microbiol.

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“…Therefore, in areas under recovery process after mining, actions aimed at increasing the content of organic carbon in the soil are essential to ensure greater biological activity and, consequently, increased nutrient availability through the mineralization of soil organic matter (Zhang et al, 2019). This fact justifies the need to adopt management practices aimed at maintaining biomass in degraded soils, as well as, to use a topsoil in better conditions and with a minimum possible storage time (Amir et al, 2022), as also found for this this study.…”

Section: Soil Fertility and Qualitymentioning

confidence: 99%

Phosphorus adsorption in a degraded soil under forestry recovery after bauxite mining in Paragominas, eastern Amazon, Brazil

et al. 2023

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The availability and retention of phosphorus (P) in soils under recovery process after mining operations play an important role in the management of this nutrient. The objective of this study was to evaluate the P adsorption in a reconstituted soil as a function of two forest recovery processes after bauxite mining. We evaluated three systems: native forest (FOR), planting of forest seedlings after bauxite mining (TPL), and natural regeneration of vegetation after bauxite mining (NRV). In each system, eight sampling plots were deployed. In each plot, we collected litter and soil samples. The soil samples were collected at depths of 0–5, 5–10, 10–20, and 20–40 cm, for soil chemical analysis and adjustment of P adsorption isotherms. We also performed an inventory of the tree vegetation to obtain basal area (G) and species diversity (H′). Forest was significantly superior with respect to most soil fertility, litter, and vegetation attributes, followed by natural regeneration and planting. In general, the adsorption curves and maximum phosphorus adsorption capacity (MPAC) in soil followed the order planting > natural regeneration > forest. We observed a negative relationship between phosphorus adsorption and soil organic matter, potential acidity, and available phosphorus. This result highlights the importance of biomass conservation and maintenance to ensure phosphorus availability in reclamation practices. Furthermore, such results indicate that both soil cover and plant species diversity should be considered when selecting species to improve P availability for reclamation of mined areas.

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“…One study found that pellets containing stockpiled topsoil (stored for over 10 years) did not signi cantly affect seedling emergence, microbial activity, or the soil bacterial community (Stock et al 2020). However, it is important to note that prolonged storage of topsoil exceeding 6 months can lead to a decline in AMF diversity and microbial activity (Amir et al 2022). The isolation of microbes and incorporation into pellets has been more successful, for example, isolated cyanobacteria in pellets have been effective in restoring soil biota and establishing biocrusts on degraded soils (Román et al 2020).…”

Section: )mentioning

confidence: 99%

Enhancing native seedling establishment on degraded agricultural land with topsoil pellets

Munro

Erickson²,

Nimmo³

et al. 2023

Preprint

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Background and aims Agricultural activities can degrade soils and promote weeds, posing challenges in restoring native plant species. Removing contaminated topsoil, a restoration method used in some agricultural systems, reduces soil nutrients, and eliminates weeds both aboveground and in soil seed bank before direct seeding. However, it also diminishes native soil seed banks and beneficial soil microbes. We investigated the potential of encasing seeds in pellets containing fresh topsoil to improve seedling performance and establishment on a degraded grassy woodland where topsoil had been removed. Methods We tested various pellet recipes, including one using commercial ingredients and three with different topsoil proportions (30%, 50%, and 70%). The study was conducted in a degraded grassy woodland in southeastern Australia, where topsoil was removed. We explored the effect of these pellet varieties on seedling emergence and growth of six native species common in this community, as well microbial activity in the soil. Results Pellets significantly improved the emergence of Chrysocephalum apiculatum, providing evidence of their effectiveness. However, pellets significantly reduced Arthropodium milleflorum and Glycine tabacina emergence. Linum marginale and Rytidosperma caespitosum emergence remained unaffected by pellets. One species, Bothriochloa macra, had insufficient emergence for analysis. The microbial activity of the soil surrounding Rytidosperma caespitosum seedlings was significantly improved by pellets, with no significant effects observed for other species. Conclusion Overall, our results demonstrate that using seed enhancement technologies in combination with direct seeding can improve the emergence of one native species on degraded agricultural soil, potentially facilitating the recovery of degraded ecosystems.

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Effects of ultramafic topsoil stockpiling during mine activities on its microbial diversity and other microbiological and physicochemical characteristics

Cited by 6 publications

References 74 publications

Arbuscular mycorrhizal fungi community analysis revealed the significant impact of arsenic in antimony- and arsenic-contaminated soil in three Guizhou regions

Arbuscular mycorrhizal fungi community analysis revealed the significant impact of arsenic in antimony- and arsenic-contaminated soil in three Guizhou regions

Phosphorus adsorption in a degraded soil under forestry recovery after bauxite mining in Paragominas, eastern Amazon, Brazil

Enhancing native seedling establishment on degraded agricultural land with topsoil pellets

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