Total and arbuscular mycorrhizal fungal communities in the first 3years after the collapse of the Fundão Dam: are we on the ecosystem recovery pathway?

After the collapse of Fundão Dam in Mariana‐MG, Brazil, the discharge of iron ore mining waste into the Doce River watershed negatively impacted the landscape. Monitoring the composition and species richness of soil microbiota may be useful bioindicators of ecosystem recovery. This study aimed to co...

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Veröffentlicht in:Restoration ecology 2023-09, Vol.31 (7)
Hauptverfasser: Isabelle Gonçalves Oliveira de Prado, Tomás Gomes Reis Veloso, José Maria Rodrigues da Luz, Marliane de Cássia Soares da Silva, Danielle Gonçalves Oliveira de Prado, Parsons, William F J, Khasa, Damase P, Maria Catarina Megumi Kasuya
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container_issue 7
container_start_page
container_title Restoration ecology
container_volume 31
creator Isabelle Gonçalves Oliveira de Prado
Tomás Gomes Reis Veloso
José Maria Rodrigues da Luz
Marliane de Cássia Soares da Silva
Danielle Gonçalves Oliveira de Prado
Parsons, William F J
Khasa, Damase P
Maria Catarina Megumi Kasuya
description After the collapse of Fundão Dam in Mariana‐MG, Brazil, the discharge of iron ore mining waste into the Doce River watershed negatively impacted the landscape. Monitoring the composition and species richness of soil microbiota may be useful bioindicators of ecosystem recovery. This study aimed to compare soil chemical properties, total fungal species, and arbuscular mycorrhizal fungi (AMF) in sites unaffected and affected by mining tailings in the first 3 years after the collapse of Fundão Dam. Soil and root samples were collected in dry and rainy seasons over 3 years in unaffected (adjacent forest and pasture) and affected areas (REC1, REC2, and PASTrec) by mine tailings. Changes in soil chemical properties over the sampling period were measured by routine chemical analyses. Total fungi in the soil was determined by high‐throughput sequencing. AMF community was evaluated using spore number, root colonization, and denaturing gradient gel electrophoresis. Affected sites had higher ranges of pH and lower soil organic matter than unaffected sites. Revegetation had a positive effect on soil fungal community. Increased similarity in AMF DGGE analysis was observed in the two sampling sites over time. A high similarity of total fungi and AMF was observed between REC and pasture areas, suggesting that revegetation strategy employed may be heading towards a pasture condition. Thus, post‐disturbance analysis of this study was important to evaluate of ecosystem recovery affected by the rupture of iron ore mining dam and demonstrated that the soil microbiota was a sensitive bioindicator in this long path of ecosystem recovery.
doi_str_mv 10.1111/rec.13954
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Monitoring the composition and species richness of soil microbiota may be useful bioindicators of ecosystem recovery. This study aimed to compare soil chemical properties, total fungal species, and arbuscular mycorrhizal fungi (AMF) in sites unaffected and affected by mining tailings in the first 3 years after the collapse of Fundão Dam. Soil and root samples were collected in dry and rainy seasons over 3 years in unaffected (adjacent forest and pasture) and affected areas (REC1, REC2, and PASTrec) by mine tailings. Changes in soil chemical properties over the sampling period were measured by routine chemical analyses. Total fungi in the soil was determined by high‐throughput sequencing. AMF community was evaluated using spore number, root colonization, and denaturing gradient gel electrophoresis. Affected sites had higher ranges of pH and lower soil organic matter than unaffected sites. Revegetation had a positive effect on soil fungal community. 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source Wiley Online Library Journals Frontfile Complete
subjects Analytical methods
Arbuscular mycorrhizas
Bioindicators
Biomonitoring
Chemical analysis
Chemical properties
Chemicophysical properties
Collapse
Colonization
Ecosystem recovery
Ecosystems
Electrophoresis
Fungi
Gel electrophoresis
Gels
Indicator species
Iron
Iron compounds
Iron ores
Microbiota
Microorganisms
Mine tailings
Mine wastes
Mining
Organic matter
Organic soils
Pasture
Rainy season
Recovery
Revegetation
Sampling
Sequences
Similarity
Soil
Soil chemistry
Soil microorganisms
Soil organic matter
Soil properties
Soils
Species richness
Spores
Tailings
Watersheds
Wet season
title Total and arbuscular mycorrhizal fungal communities in the first 3years after the collapse of the Fundão Dam: are we on the ecosystem recovery pathway?
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