We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Structure and putative function of a soil microbial community impacted by the deposition of tailings and subsequent revegetation after the rupture of the Fundao Dam.
- Authors
Lima, Helena Santiago; Cavalcante, João Paulo Campos Moura; Silva, Lívia Carneiro Fidélis; da Silva, Marliane de Cássia Soares; de Paula, Sérgio Oliveira; Kasuya, Maria Catarina Megumi; da Silva, Cynthia Canêdo
- Abstract
The rupture of the Fundão Dam containing iron‐rich mining tailings, in 2015, was one of the worst environmental disasters in Brazil. The deposition of tailings has generated serious impacts on the soil and, as microorganisms play an important role in these environments, the recovery of the microbial community is a critical step in restoring the soil for sustainable use. Soil microorganisms and their activities are recognized as sensitive bioindicators for environmental changes; however, few experiments have been conducted to investigate the response of the microbial community to the magnitude of the impact caused by the Fundão Dam rupture and the effect of the use of revegetation natural or induced for ecosystem recovery, especially in Brazil. This study aimed to evaluate the dynamics of community structure and putative functions, over time, in response to the deposition of the tailings on the soil by bacterial 16S rRNA sequencing. We evaluated an area affected by tailings, covered with natural and induced revegetation. The results revealed a temporal dynamic of the soil microbiota, which demonstrates that the microbial community structure of these areas differed, mainly in less abundant taxa, and the induced revegetation area was closer to the forest than natural revegetation. These results reveal the importance of implementing revegetation programs to accelerate the initial recovery. Functions related to the use of alternative electron acceptors differed, possibly due to the greater compaction of the affected soil. Despite the improvement of the impacted areas over time, the strong effect of tailings deposition on the bacterial community structure can still be noticed.
- Subjects
BRAZIL; REVEGETATION; MICROBIAL communities; SOIL microbiology; SOIL compaction; DAMS; SOILS
- Publication
Land Degradation & Development, 2022, Vol 33, Issue 8, p1235
- ISSN
1085-3278
- Publication type
Article
- DOI
10.1002/ldr.4215