Relações solo-paisagem no Quadrilátero Ferrífero em Minas Gerais

Filho, Amaury de Carvalho; Curi, Nilton; Shinzato, Edgar

doi:10.1590/s0100-204x2010000800017

Cited by 36 publications

(28 citation statements)

References 6 publications

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“…In this study, chemical analysis showed that the lowest value was 124.7 mg dm -³ . This result corroborates the soil characterization made by Carvalho Filho et al (2010) in this region, which describes the soils of the inner face of the Serra da Moeda as shallow and generally very stony that are derived from itabirite, with great iron concentration.…”

Section: Chemical and Physical Analysis Of Soilssupporting

confidence: 89%

“…The landscape of this environment is currently composed of fragments of Brazilian environmental hotspots, the Brazilian neotropical savanna (Cerrado) and the Atlantic Forest, which have been intensely transformed by human activities, with emphasis on urbanization and mining, generating impacts such as soil removal and consequent loss of vegetation cover (Jacobi and Carmo, 2008). Soils in this region are mainly ferruginous and generally of low fertility, acidic, and shallow; this has a considerable effect on the vegetation cover, which is composed of plants adapted to these peculiar conditions in the areas of ironstone outcrops (Costa, 2007;Carvalho Filho et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Diversity and Efficiency of Rhizobia Communities from Iron Mining Areas Using Cowpea as a Trap Plant

Castro

Souza

Rufini

et al. 2017

Rev. Bras. Ciênc. Solo

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How to cite: Castro JL, Souza MG, Rufini M, Guimarães AA, Rodrigues TL, Moreira FMS. Diversity and efficiency of rhizobia communities from iron mining areas using cowpea as a trap plant. Rev Bras Cienc Solo. 2017;41:e0160525. https://doi.org/10.1590/18069657rbcs20160525Copyright: This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided that the original author and source are credited. Division -Soil Processes and Properties ABSTRACT:Mining is an important economic activity. However, its impact on environment must be accessed, mainly on relevant processes for their sustainability. The objective of this study was to evaluate the diversity and efficiency of symbiotic nitrogen fixing bacterial communities in soils under different types of vegetation in the Quadrilátero Ferrífero: ironstone outcrops, Atlantic Forest, neotropical savanna, and a rehabilitated area revegetated with grass. Suspensions of soil samples collected under each type of vegetation were made in a saline solution to capture rhizobia communities that were then inoculated on cowpea [Vigna unguiculata (L.) Walp.], which was used as a trap plant. The symbiotic efficiency of the communities was evaluated in a greenhouse experiment and the data obtained were correlated to the chemical and physical properties of the soils under each type of vegetation. At the end of the experiment, the bacteria present in the nodules were isolated to evaluate their diversity. The highest numbers of nodules occurred in the treatment inoculated with soil samples from rehabilitated area revegetated with grass and neotropical savanna vegetation, and the lowest numbers were observed in the treatment inoculated with soil samples from ironstone outcrops and Atlantic Forest. In relation to root dry matter, the treatment inoculated with soil samples from Neotropical savanah was superior to those inoculated with soil samples from the other areas; already, in relation to the shoot dry matter, no significant difference among the treatments was observed. The soil properties with the greatest influence on the microbial communities were Al 3+ content, considered as high in the Atlantic Forest and neotropical savanna vegetation, as intermediate in the iron outcrops, and as very low in the rehabilitated area revegetated with grass; organic matter, considered as very high in the ironstone outcrops and neotropical savanna, as high in the Atlantic Forest, and as low in the rehabilitated area revegetated with grass; and the pH, with intermediate acidity level in the rehabilitated area revegetated with grass, high level of acidity in the iron outcrops and neotropical savanna, and very high acidity in the Atlantic Forest. After isolation of the nodules, 380 bacterial strains were obtained and separated into 27 groups by cultural characterization analysis. Genetic diversity was evaluated by the 16S rRNA gene partial sequencing of 156 strains, which identifie...

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Section: Chemical and Physical Analysis Of Soilssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Diversity and Efficiency of Rhizobia Communities from Iron Mining Areas Using Cowpea as a Trap Plant

Castro

Souza

Rufini

et al. 2017

Rev. Bras. Ciênc. Solo

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“…One of these areas in the central part of Minas Gerais is known as the Quadrilátero Ferrífero, which is of great historical-cultural and economic importance due to iron ore extraction (Carvalho Filho;Curi;Shinzato, 2010). However, although the extraction of Fe is economically important, iron mining brings about changes in the landscape, with impacts on plant cover, on soil biodiversity, and, consequently, on the biogeochemical cycles of the elements (Siqueira et al, 2007;Xing et al, 2015) since the process of opening mining pits involves removing soil over the ore (which is sterile) and depositing it in other locations, forming piles.…”

Section: Introductionmentioning

confidence: 99%

Arbuscular mycorrhizal fungal communities in an iron mining area and its surroundings: Inoculum potential, density, and diversity of spores related to soil properties

et al. 2017

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Arbuscular mycorrhizal fungi (AMF) interact symbiotically with most plant species, facilitating revegetation of areas under rehabilitation. The aim of this study was to evaluate the inoculum potential, density, and diversity of AMF spores in five environments, as well as the relation of species with soil properties. Soil samples were collected in five environments in a mining area and its surroundings in the Quadrilátero Ferrífero, Minas Gerais (Brazil): tailings piles in rehabilitation with grass, canga, Cerrado, native forest, and eucalyptus plantation; these samples were subjected to chemical and physical analyses. Spores were directly extracted from field samples and from trap cultures (TCs) established in two locations in the Southeast and South regions of Brazil for taxonomic identification of the species. Species richness, the Shannon diversity index (H'), and equitability were determined. Principal component analysis (PCA) was used to identify soil properties that most influenced AMF occurrence. Spore density showed no significant difference among the environments. A total of 59 AMF species were found. This is the first report of the occurrence of Acaulospora nivalis and Acaulospora alpina in Brazil. Higher H' and species richness in the field were found in tailings piles and lower in canga. Canga showed higher inoculum potential. The development of TCs in two locations allowed a wider diversity of AMF species to be captured. Environments of the Quadrilátero Ferrífero are hotspots of AMF diversity, and the soil pH and exchangeable S and P contents are the properties that best explain the distribution of AMF species.

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“…As médias anuais de precipitação estão entre 1.000-1.500 mm e as de temperatura variam entre 19-22 ºC (SEA, 1980). A região marca a transição entre o Cerrado e a Mata Atlântica, apresentando grande diversidade e complexidade estrutural de ambientes e tipos fi tofi sionômicos, com destaque para as matas de galeria, florestas semideciduais, matas de candeia, campo cerrado, campos rupestres e de altitude (CARVALHO FILHO et al, 2010).…”

Section: A áRea De Estudounclassified

Morfogênese No Quadrilátero Ferrífero/Mg No Quaternário Superior: Processos Fluviais E Condicionantes Paleoambientais Na Bacia Do Rio Das Velhas

Barros¹,

Magalhães²

2018

Rev. Bras. Geomorfol.

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Resumo:Visando aprofundar a compreensão da geomorfologia regional, diversos levantamentos de níveis e sucessões deposicionais fl uviais foram empreendidos no Quadrilátero Ferrífero nas últimas décadas. Entretanto, faltam estudos mais regionalizados, que analisem mais de um vale fl uvial. A partir de novos dados e da releitura em campo da literatura sobre o tema na área de estudo, este trabalho discute o quadro de níveis e sucessões deposicionais fl uviais da bacia do alto Rio das Velhas, que compreende a drenagem da área core do Quadrilátero Ferrífero. Os resultados revelam um relevo dinâmico, sensível às forças tectônicas e variações climáticas do Quaternário Superior. Os níveis deposicionais fl uviais foram datados entre 84-1 Ka por Luminescência Opticamente Estimulada (LOE), permitindo a releitura de dados anteriores e a correlação de depósitos em fases de evolução do sistema fl uvial do alto Rio das Velhas. Esses níveis são, em sua maioria, dos tipos escalonado e pareado e, portanto, confi guram-se como importantes marcadores dos ritmos da tectônica quaternária na região. Destaca-se o encaixamento de alguns cursos d'água ainda no Holoceno Superior. As datações permitem a associação de diferentes níveis fl uviais com oscilações climáticas, que deixaram como registros couraças ferruginosas desenvolvidas sob um clima mais seco/frio que o atual, bem como o embutimento de planícies de inundação em níveis mais antigos, desenvolvidos durante o último máximo glacial. Informações sobre o Artigo

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Relações solo-paisagem no Quadrilátero Ferrífero em Minas Gerais

Cited by 36 publications

References 6 publications

Diversity and Efficiency of Rhizobia Communities from Iron Mining Areas Using Cowpea as a Trap Plant

Diversity and Efficiency of Rhizobia Communities from Iron Mining Areas Using Cowpea as a Trap Plant

Arbuscular mycorrhizal fungal communities in an iron mining area and its surroundings: Inoculum potential, density, and diversity of spores related to soil properties

Morfogênese No Quadrilátero Ferrífero/Mg No Quaternário Superior: Processos Fluviais E Condicionantes Paleoambientais Na Bacia Do Rio Das Velhas

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