Genesis, properties and classification of Cryosols from Admiralty Bay, maritime Antarctica

Simas, Felipe Nogueira Bello; Schaefer, Carlos Ernesto Gonçalves Reynaud; Filho, Manoel Ricardo Albuquerque; Francelino, Márcio Rocha; Filho, Elpídio Inácio Fernandes; Costa, Liovando Marciano da

doi:10.1016/j.geoderma.2007.10.019

Cited by 142 publications

(153 citation statements)

References 18 publications

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“…We observed that the bacterial community structure was very similar between almost all samples, unlike typical soil communities, despite the differences in soil composition shown in Table 2, especially the variations in pH, K, Al and P. Also, Simas et al (2008) showed that in Keller Peninsula (where our sampling points I and Q are located) the N content was very low (being not detected) and in Rakusa point (where our sampling point A is located) the N content was 4.3±1.0 g kg À1 .…”

Section: Discussionmentioning

confidence: 66%

“…Despite the fact that we also found a great abundance of Proteobacteria sequences, which represented 24.8% to almost 40% of all sequences found in the Antarctic rhizosphere samples (depending on the sample), this was not the dominant phylum. This singular microbiological profile of maritime Antarctica soils may be related to the unique soil properties of this environment when compared with those from other Antarctic climatic zones as revealed by Simas et al (2008).…”

Section: Discussionmentioning

confidence: 89%

“…During the austral summer of 2006-2007, D. antarctica and C. quitensis vascular plants were sampled near each other (about 0.5-1 m apart) in triplicate at three sites (A, Q and I; Figure 1; Table 1). In these areas, the soil was previously characterized as loamy sand (Simas et al, 2008). Point A was located inside an environmental protected area close to Arctowski Polish Station and next to a colony of Adelie penguins (Pygoscelis adeliae).…”

Section: Methodsmentioning

confidence: 99%

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Bacterial diversity in rhizosphere soil from Antarctic vascular plants of Admiralty Bay, maritime Antarctica

et al. 2010

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The Antarctic is a pristine environment that contributes to the maintenance of the global climate equilibrium. The harsh conditions of this habitat are fundamental to selecting those organisms able to survive in such an extreme habitat and able to support the relatively simple ecosystems. The DNA of the microbial community associated with the rhizospheres of Deschampsia antarctica Desv (Poaceae) and Colobanthus quitensis (Kunth) BartI (Caryophyllaceae), the only two native vascular plants that are found in Antarctic ecosystems, was evaluated using a 16S rRNA multiplex 454 pyrosequencing approach. This analysis revealed similar patterns of bacterial diversity between the two plant species from different locations, arguing against the hypothesis that there would be differences between the rhizosphere communities of different plants. Furthermore, the phylum distribution presented a peculiar pattern, with a bacterial community structure different from those reported of many other soils. Firmicutes was the most abundant phylum in almost all the analyzed samples, and there were high levels of anaerobic representatives. Also, some phyla that are dominant in most temperate and tropical soils, such as Acidobacteria, were rarely found in the analyzed samples. Analyzing all the sample libraries together, the predominant genera found were Bifidobacterium (phylum Actinobacteria), Arcobacter (phylum Proteobacteria) and Faecalibacterium (phylum Firmicutes). To the best of our knowledge, this is the first major bacterial sequencing effort of this kind of soil, and it revealed more than expected diversity within these rhizospheres of both maritime Antarctica vascular plants in Admiralty Bay, King George Island, which is part of the South Shetlands archipelago.

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Section: Discussionmentioning

confidence: 66%

Section: Discussionmentioning

confidence: 89%

Section: Methodsmentioning

confidence: 99%

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Bacterial diversity in rhizosphere soil from Antarctic vascular plants of Admiralty Bay, maritime Antarctica

et al. 2010

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“…The facilitation of more chemical and biological processes allows soil development to progress at a greater rate relative to other areas in Antarctica (though soil development is still weak in a global context) and allows the accumulation, recycling and retention of nutrients to occur. Acid-sulfate soils on King George (Simas et al 2008) and Seymour Islands (Balks et al 2013) result from acid production from the oxidation of sulfides and represent an extreme soil habitat as a result of moisture-facilitated chemical weathering.…”

Section: Antarctic Peninsulamentioning

confidence: 99%

Microbiology of Eutrophic (Ornithogenic and Hydrocarbon-Contaminated) Soil

Aislabie

Novis

Ferrari

2014

Antarctic Terrestrial Microbiology

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“…Antarctica, which is the coldest continent, has unique climatic and weathering conditions that lead to unique soil formation in ice-free areas at very slow rates (Simas et al, 2008). Pedogenesis in Antarctica is generally less advanced, due to the combination of freezing conditions, low liquid water availability, weak biological activity, and chemical and physical processes occurring only during the summer.…”

Section: Introductionmentioning

confidence: 99%

Environmental Correlation and Spatial Autocorrelation of Soil Properties in Keller Peninsula, Maritime Antarctica

Moraes

Francelino

Carvalho

et al. 2018

Rev. Bras. Ciênc. Solo

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ABSTRACT:The pattern of variation in soil and landform properties in relation to environmental covariates are closely related to soil type distribution. The aim of this study was to apply digital soil mapping techniques to analysis of the pattern of soil property variation in relation to environmental covariates under periglacial conditions at Keller Peninsula, Maritime Antarctica. We considered the hypothesis that covariates normally used for environmental correlation elsewhere can be adequately employed in periglacial areas in Maritime Antarctica. For that purpose, 138 soil samples from 47 soil sites were collected for analysis of soil chemical and physical properties. We tested the correlation between soil properties (clay, potassium, sand, organic carbon, and pH) and environmental covariates. The environmental covariates selected were correlated with soil properties according to the terrain attributes of the digital elevation model (DEM). The models evaluated were linear regression, ordinary kriging, and regression kriging. The best performance was obtained using normalized height as a covariate, with an R 2 of 0.59 for sand. In contrast, the lowest R 2 of 0.15 was obtained for organic carbon, also using the regression kriging method. Overall, results indicate that, despite the predominant periglacial conditions, the environmental covariates normally used for digital terrain mapping of soil properties worldwide can be successfully employed for understanding the main variations in soil properties and soil-forming factors in this region.

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Genesis, properties and classification of Cryosols from Admiralty Bay, maritime Antarctica

Cited by 142 publications

References 18 publications

Bacterial diversity in rhizosphere soil from Antarctic vascular plants of Admiralty Bay, maritime Antarctica

Bacterial diversity in rhizosphere soil from Antarctic vascular plants of Admiralty Bay, maritime Antarctica

Microbiology of Eutrophic (Ornithogenic and Hydrocarbon-Contaminated) Soil

Environmental Correlation and Spatial Autocorrelation of Soil Properties in Keller Peninsula, Maritime Antarctica

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