‘Quadrilátero Ferrífero’: A Beautiful and Neglected Landscape Between the Gold and Iron Ore Reservoirs

Salgado, André Augusto Rodrigues; Carmo, Flávio Fonseca do

doi:10.1007/978-94-017-8023-0_29

Cited by 21 publications

(13 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Its limits include 12 municipalities and an approximate area of 530 km 2 . The Iron Quadrangle [19] is considered one of the largest producers of iron ore in the world and has been playing a leading role in the development of Brazil since the eighteenth century due to the mineral exploration [66].…”

Section: Description Of the Study Areamentioning

confidence: 99%

“…Although such systems are spatially restricted, they have high potential for the occurrence of caves, with more than 2000 records until 2015 [58,59]. The caves located in the Iron Quadrangle have developed in the inner part of the ferruginous breccias, within the BIF, and at contact points between them [66]. In general, caves are dry and small and many of them have only one small chamber with conduits tapering into small channels, irregular sections and with pillars, pendants and skylights [9,58,59].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Landscape evolution in ferruginous geosystems of the Iron Quadrangle, Brazil: a speleological approach in a biodiversity hotspot

2019

View full text Add to dashboard Cite

Natural subterranean caves represent a complex system, and studying them requires a holistic perspective considering their integration with the landscape. The vegetal cover around caves plays a key role in the energy input to the subterranean environment, mainly in caves associated with ferriferous formations, since the primary production by photosynthetic organisms is absent in such environments due to the permanent darkness. The current research aimed to characterize transitions in the composition of the surrounding landscape of a set of 235 ferruginous caves in the Iron Quadrangle, (Minas Gerais, Brazil) from 1984 to 2015, using information of remote sensors, geoprocessing techniques and concepts of landscape ecology. The analysis of landscape composition indicated a significant decrease in the conservation level of the study area (530 km 2), which has lost 22.14% of the original vegetal cover. The conversion of native vegetation into anthropized areas in this period eliminated almost the entire protection radius of 15% of the caves known in the region, as well as committed the surrounding area of other 32%. This study demonstrated the need to develop scientific researches that relate the cave fauna and vegetal cover surrounding the caves, as well as the consequences that anthropic activities may cause to the subterranean environment.

show abstract

Section: Description Of the Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Landscape evolution in ferruginous geosystems of the Iron Quadrangle, Brazil: a speleological approach in a biodiversity hotspot

2019

View full text Add to dashboard Cite

show abstract

“…Some canga outcrops can be about 20-30 m thick, with records of origin that started at ca. 50 Ma, thus representing one of the oldest landscapes in Brazil ( Dorr 1969 , Monteiro et al 2014 , Salgado and Carmo 2015 ).…”

Section: Introductionmentioning

confidence: 99%

Check-list of vascular plant communities on ironstone ranges of south-eastern Brazil: dataset for conservation

Carmo¹,

Mota²,

Kamino³

et al. 2018

BDJ

View full text Add to dashboard Cite

BackgroundIronstone ranges are considered hotspots for higher plants α and β diversity. The lack of studies and the intense degradation of the ironstone ranges, due to mining, motivated us to compile, for the first time, a list of vascular plants collected on iron-rich derived substrates from ancient landscape of south-eastern Brazil. All existing records in the Brazilian Virtual Herbarium of Flora and Fungi for each of the 43 municipalities containing ironstone ranges were downloaded, resulting in 17,954 vouchers identified to the species level. We found 2,933 species belonging to 160 families and 818 genera.New informationFor the first time, we identified 148 species mentioned in endangered flora official lists and 48 narrow endemic species. Collecting efforts must still be supported to properly sample the vegetation since, for 143 sites, less than 10 records/site were found. This dataset will assist with the indication of dozens of plant species whose threat criteria must be urgently assessed to subsidise public policies on the use and conservation of the Brazilian flora.

show abstract

“…Therefore, mining activity in this region placed Brazil as the second largest world provider of iron ore. In 2014, around 400 million tons were produced, most of which extracted from IQ, which concentrates almost 80% of iron mines in activity (Salgado and Carmo, 2015). The high geochemical diversity and intense mining activities resulted in soils and stream sediments with anomalous concentrations of many different trace elements such as Zn, Pb, Ni, Cr, and As.…”

Section: Introductionmentioning

confidence: 99%

Alcaligenes faecalisassociated with Mimosa calodendron rizhosphere assist plant survival in arsenic rich soils

Felestrino

Assis

Lemes

et al. 2017

J. Soil Sci. Plant Nutr.

Self Cite

View full text Add to dashboard Cite

The ferruginous rupestrian grasslands (FRG) in the Iron Quadrangle (IQ) are ecosystems characterized by rocky soils with reduced availability of water and nutrients, but high levels of metals. In order to comprehend the interference of microorganisms on the adaptive process of endemic plant Mimosa calodendrum (Fabaceae), bacteria associated with its roots and rhizosphere were isolated. Fourteen isolates were obtained and subsequently grown in the presence of different concentrations of arsenic (As) species. The isolate Mc250, an Alcaligenes faecalis strain, resisted to 10 mM of As (III) and 800 mM of As (V). In the presence of this strain, atomic spectrometer detected a reduction of 55% for As (III) and 72% for As (V) respectively in 10 mM and 500 mM solution. Scanning electron microscopy of this isolate demonstrated morphological modification and EDX spectroscopy revealed the presence of both As species adsorbed on the membrane, justifying the removal observed in the in vitro assays. To validate this potential removal of As in vivo, tomato plants were used as grown model in the presence and absence of A. faecalis in soil previously contaminated with 5 mM of As (III). After 14 days, plants from contaminated soil had their growth improved when compared to untreated control plants. All these results suggest for the first time that plant-associated bacteria from FRG-IQ present potential for soil rhizoremediation and may benefit the adaptive processes of plants in extreme environments including application in recovering degraded areas.

show abstract

‘Quadrilátero Ferrífero’: A Beautiful and Neglected Landscape Between the Gold and Iron Ore Reservoirs

Cited by 21 publications

References 33 publications

Landscape evolution in ferruginous geosystems of the Iron Quadrangle, Brazil: a speleological approach in a biodiversity hotspot

Landscape evolution in ferruginous geosystems of the Iron Quadrangle, Brazil: a speleological approach in a biodiversity hotspot

Check-list of vascular plant communities on ironstone ranges of south-eastern Brazil: dataset for conservation

Alcaligenes faecalisassociated with Mimosa calodendron rizhosphere assist plant survival in arsenic rich soils

Contact Info

Product

Resources

About