The soils in the highlands of north-eastern Rio Grande do Sul (Brazil) are distributed in a mosaic of grassland and deciduous forest with the conifer
Araucaria angustifolia. The objectives of this study were (1) to identify the relationships between vegetation mosaic and soil properties, (2) to reconstruct the vegetation history, (3) to investigate if the composition of soil organic matter is associated with vegetation changes.
Overall, the results of this investigation are important contributions for a better understanding of vegetation history in the southern Brazilian highlands. This was achieved by characterising soil organic matter, especially by the combined evaluation of the chemical composition and the carbon isotope signatures. In addition, this study revealed that the formation and permanence of nonallophanic Andosols is related to grass vegetation, whereas Araucaria forest establishment results in the development of Umbrisols and the loss of andic properties.
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The soils in the highlands of north-eastern Rio Grande do Sul (Brazil) are distributed in a mosaic of grassland and deciduous forest with the conifer
Araucaria angustifolia. The objectives of this study were (1) to identify the relationships between vegetation mosaic and soil properties, (2) to reconstruct the vegetation history, (3) to investigate if the composition of soil organic matter is associated with vegetation changes.
Overall, the results of this investigation are important contribut...
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