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Paleoenvironmental Characterization of a High-Mountain Environment in the Atlantic Forest in Southeastern Brazil

Eduardo Carvalho da Silva Neto, Jaqueline Jesus Santana dos Santos, Marcos Gervasio Pereira, Deyvid Diego Carvalho Maranhão, Fabiana da Costa Barros, Lúcia Helena Cunha dos Anjos

02/Nov/2018

ABSTRACT: Records of changes in the phytosociological structure of vegetation can be observed more clearly in soils that have more significant accumulation of organic matter, like those occurring in high-mountain environments. The aim of this study was to characterize soils formed in high-mountain environments in the Itatiaia National Park (INP), state of Rio de Janeiro, southeastern Brazil, and to discuss the potential of preserved phytoliths as markers of vegetative history and environmental factors. Four profiles were selected, which were morphologically […]

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Surface mapping, organic matter and water stocks in peatlands of the Serra do Espinhaço meridional – Brazil

Márcio Luiz da Silva, Alexandre Christófaro Silva, Bárbara Pereira Christófaro Silva, Uidemar Morais Barral, Pablo Gomes e Souza Soares, Pablo Vidal-Torrado

01/Oct/2013

Peatlands are soil environments that store carbon and large amounts of water, due to their composition (90 % water), low hydraulic conductivity and a sponge-like behavior. It is estimated that peat bogs cover approximately 4.2 % of the Earth’s surface and stock 28.4 % of the soil carbon of the planet. Approximately 612 000 ha of peatlands have been mapped in Brazil, but the peat bogs in the Serra do Espinhaço Meridional (SdEM) were not included. The objective of this […]

Lignocellulosic and isotopic composition of vegetation and soil organic matter of a tropical peat. I floristic composition, biomass and carbon stock

Vinicius Evangelista Silva, Alexandre Christofaro Silva, Rosana Cristina Pereira, Plínio Barbosa de Camargo, Bárbara Pereira Christofaro Silva, Uidemar Morais Barral, [...]

01/Feb/2013

Soil organic matter (SOM) is one of the major reservoirs of carbon on Earth and is one of the key contributors to the carbon cycle. Peatlands are natural accumulators of organic matter commonly derived from decomposing plant residues in water-saturated environments, and represent an initial stage of a much longer pedogenic pathway leading to carbonification. The soil biomass markedly influences the global carbon cycle, accounting for approximately 85 % of all carbon on the Earth’s surface. Plant tissues are mainly […]

Lignocellulosic and isotopic composition of vegetation and soil organic matter of a tropical peat. II humic substances and humification processes

Alexandre Christofaro Silva, Vinicius Evangelista Silva, Bárbara Pereira Christofaro Silva, Plínio Barbosa de Camargo, Rosana Cristina Pereira, Uidemar Morais Barral, [...]

01/Feb/2013

Much of the organic matter of a typical peat consists of humic substances, mainly formed via humification of organic residues, decomposed by soil microorganisms, and by the polymerization of organic compounds to functional macromolecules, which are normally more resistant to degradation. The fundamental pathways governing the humification of soil organic matter (SOM) are not well understood so far, and most available data about the identified chemical precursors of humic substances and the main chemical routes by which they are transformed […]

Mapping, organic matter mass and water volume of a peatland in serra do espinhaço meridional

José Ricardo da Rocha Campos, Alexandre Christófaro Silva, Pablo Vidal-Torrado

01/Jun/2012

Peatlands form in areas where net primary of organic matter production exceeds losses due to the decomposition, leaching or disturbance. Due to their chemical and physical characteristics, bogs can influence water dynamics because they can store large volumes of water in the rainy season and gradually release this water during the other months of the year. In Diamantina, Minas Gerais, Brazil, a peatland in the environmental protection area of Pau-de-Fruta ensures the water supply of 40,000 inhabitants. The hypothesis of […]

Environmental functionalities of upper montane soils in Serra da Igreja, southern Brazil

Maurício Bergamini Scheer, Gustavo Ribas Curcio, Carlos Vellozo Roderjan

01/Aug/2011

Although in Paraná some upper montane ecosystems are still in excellent conditions, imminent anthropogenic threats and the vulnerability of these environments have raised concern. The objectives of this study were: (1) to characterize representative soils of high altitude grasslands and upper montane rain forests in the Serra da Igreja; (2) identify the possible pedological factors underlying the different vegetation types and; (3) describe some of the environmental roles of the soils of these areas (carbon stock and water retention). The […]

Comparison of H/Al stoichiometry of mineral and organic soils in Brazil

Daniel Vidal Perez, Lúcia Helena Cunha dos Anjos, Adierson Gilvani Ebeling, Marcos Gervasio Pereira

01/Aug/2009

Exchangeable Al has been used as a criterion for the calculation of lime requirement in several Brazilian States. However, the laboratory method with extraction by a 1 mol L-1 KCl solution followed by indirect alkaline titration is not accurate for some Brazilian soils, mainly in the case of soils with high organic matter content. The objective of this study was therefore to evaluate the stoichiometry of H+/Al3+ in KCl soil extracts. The results suggested that organically complexed Al is the […]