Remnant wetlands under palm swamps in the Araripe Plateau, Brazilian semiarid

•Hydrogeological and microclimate yield wetlands in Brazilian semiarid.•C-rich dystrophic Gleysols occur in an atypical landscape of Caatinga.•Erosion of slope is frequent and buries histic and humic horizons. Palm swamps are typical of the plateaus in the Brazilian savanna, but they are present in...

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Bibliographic Details
Published in:Catena (Giessen) 2023-06, Vol.226, p.107074, Article 107074
Main Authors: Freire Guerra, Maria Daniely, Lelis Leal de Souza, José João, Gonçalves Reynaud Schaefer, Carlos Ernesto, Nogueira de Souza, Marcos José
Format: Article
Language:English
Subjects:
alluvium
Caatinga
catenas
colluvium
Dry forest
evolution
hydrolysis
luminescence
morphogenesis
OSL dating
Redoximorphic features
savannas
semiarid zones
soil profiles
World Reference Base for Soil Resources
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Summary:•Hydrogeological and microclimate yield wetlands in Brazilian semiarid.•C-rich dystrophic Gleysols occur in an atypical landscape of Caatinga.•Erosion of slope is frequent and buries histic and humic horizons. Palm swamps are typical of the plateaus in the Brazilian savanna, but they are present in remnant in the Brazilian semiarid region, exceptionally in selective concave sectors of the edge and steep slopes at the Araripe Plateau. This study aimed to investigate the genesis and evolution of remnant wet soils under buriti palms/palm swamps in the Brazilian semiarid. Three pedons were selected, described, and classified according to the World Reference Base for soil resources. Soil samples were collected from the surface down to the lithic contact at each pedon. Morphology, chemical, and physical attributes were analyzed. Optically stimulated luminescence (OSL) dating was applied to buried horizons at soil profile soil profile number 1. Our results show that remnant wetlands are associated with dynamics of the hydrogeological conditions and the regional relief, strongly influenced by the morphostructure and the current morphogenesis of the Araripe Plateau. In clear contrast with typical semiarid soils, the hydrolysis and ferrolysis have produced acid, hyperdystrophic, and C-rich horizons. Evidence of colluvium and alluvium show that the soils are polycyclic. The ages between
ISSN:0341-8162
1872-6887
DOI:10.1016/j.catena.2023.107074