Pantanal: The Brazilian Wetlands

Boin, Marcos Norberto; Martins, Patrícia Cristina Statella; Silva, Charlei Aparecido da; Salgado, André Augusto Rodrigues

doi:10.1007/978-3-030-04333-9_5

Cited by 5 publications

(2 citation statements)

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“…The highlands are mostly covered by the Cerrado, with portions of Amazon, Atlantic forest and Chaco vegetation in the northern, southeastern and southern regions, respectively (Figure 1). The UPRB and the Pantanal in Brazil are located in the states of Mato Grosso (MT) and Mato Grosso do Sul (MS), with 65% of the Pantanal located in MS (Boin et al, 2019;Schulz et al, 2019).…”

Section: Study Areamentioning

confidence: 99%

Simulating land use changes, sediment yields, and pesticide use in the Upper Paraguay River Basin: Implications for conservation of the Pantanal wetland

Roque

Guerra

Johnson

et al. 2021

Agriculture, Ecosystems & Environment

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Section: Study Areamentioning

confidence: 99%

Simulating land use changes, sediment yields, and pesticide use in the Upper Paraguay River Basin: Implications for conservation of the Pantanal wetland

Roque

Guerra

Johnson

et al. 2021

Agriculture, Ecosystems & Environment

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“…The Lower Nhecolândia subregion is covered by sandy clay sediments from the Pantanal Formation, with incipient clay and organic matter stratification and cemented by ferruginous material, but without current sediment input (Godoi et al, 2001;Assine, 2005). The soils are substantially sandy, with predominance of fine sand and salt accumulation, and may have a textural gradient (Furquim et al, 2010(Furquim et al, , 2017RCC, 2012;Schiavo et al, 2012;Boin et al, 2019;IBGE, 2019b;Andrade et al, 2020). Specifically, soils with spodic features occur in periodically flooded areas, such as bays, salines and "cordilheiras" (RCC, 2012;Schiavo et al, 2012), normally under deciduous tropical Cerradão (woodland savanna) and tropical Cerrado (open shrub) vegetation.…”

Section: Introductionmentioning

confidence: 99%

Soils with dark subsurface horizons in saline basins in the Brazilian Pantanal

Menezes¹,

Fontana²,

Anjos³

et al. 2022

Revista Brasileira De Ciência Do Solo

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Soils in the Brazilian Pantanal classified as Espodossolos and registered in the literature diverge from the central concept of pedogenesis by podzolization, especially due to the high values of pH and basic cations, although the morphology is similar to that of spodic horizons. In this sense, this study hypothesized that the neutral to alkaline conditions along the edges of the saline basins in the Lower Nhecolândia region do not inhibit the podzolization process nor the development of spodic soils. The objectives were to analyze the attributes of soils with spodic features and evaluate whether they correspond to a podzolization process. Four profiles in a transect in Lower Nhecolândia were selected, where the morphology indicated the presence of a spodic horizon. Three profiles (P1, P2 and P4) were located in a bay and one in the transition between a bay and a "cordilheira" (small elevation between lagoons) (P3). The soils were analyzed for particle size, chemistry and X-ray fluorescence (XRF), as well as organic carbon (C org), total carbon (TC) and XRF of the nodules. The complexity of features and characteristics of soil profiles in the Lower Nhecolândia region indicate multiple pedogenetic processes in this environment. The characteristics of all profiles denote a redoximorphic process: poor profile development (except for P3), mottles formed by precipitation of Fe and Mn oxides, as well as presence of Fe and Mn nodules. The organic matter content of these nodules is mostly greater than or equal to that of the surrounding material, and aluminum is relatively not higher than in the fine earth. This reinforces a rexodimorphic process in the horizons with spodic features. The occurrence of sodic and solodic characters, as well as clay accumulation in P3 also characterize the sodification process. The neutral to alkaline pH values in water, high sum of bases and low C org and Al oxide contents of the studied soils all contradict the occurrence of a podzolization process. However, Fe, Al and C org accumulation in the nodules and some B horizons indicate a spodic character. Also, the fact that SiBCS criteria classify the studied soils as Espodossolos indicates the relevance of establishing limits for chemical attributes, which would adjust the taxonomy of soils with a spodic character according to their pedogenesis.

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