@article{fdi:010075495,
  title = {{O}n the link between soil hydromorphy and geomorphological development in the {C}errado ({B}razil) wetlands},
  author = {{R}osolen, {V}. and {B}ueno, {G}. {T}. and {M}utema, {M}. and {M}oreira, {C}. {A}. and {F}aria, {I}. {R}. and {N}ogueira, {G}. and {C}haplot, {V}incent},
  editor = {},
  language = {{ENG}},
  abstract = {{M}ound fields ({MF}), which consist of numerous isolated mounds, are characteristic of the {C}errado wetlands of {B}razil. {W}hile there are numerous studies on soil redistribution by termites and by differential particulate erosion, a new hypothesis, supported by metal accumulation in these areas, needs to be tested. {T}his study aimed to investigate the extent to which soil saturation by water, and the associated chemical erosion, might be a key driver of the geomorphological development of the {C}errado wetlands. {T}he study was performed in a typical wetland of {M}inas {G}erais that shows a typical succession from well drained {F}erralsols on the plateau to {G}leysols on the lowland and the presence of {MF} at the transition. {S}oil morphological description was used together with optical microscopy, {X}-ray fluorescence and physical analyses (grain size and bulk density) to discriminate between the biological (bioturbation) and geochemical origins. {A}dditionally, geochemical mass balance was calculated to estimate the total amount of chemical erosion that had occurred in the area. {T}he morphological observations and the results on soil texture did not point to material redistribution in the {MF}. {I}n contrast, the results showed that iron-depleted aggregates in depressed zones were sensitive to collapse. {S}oil saturation by water as the main cause of geochemical erosion and geomorphologic development was confirmed by mass balance calculation. {T}he results fill an important information gap on the formation and evolution of cerrado soil landscapes, which have important consequences for biodiversity and water conservation.},
  keywords = {{F}erralsol, {G}leysol ; {W}etlands ; {M}icrotopography ; {G}ranular microstructure ; {BRESIL} ; {CERRADO}},
  booktitle = {},
  journal = {{C}atena},
  volume = {176},
  numero = {},
  pages = {197--208},
  ISSN = {0341-8162},
  year = {2019},
  DOI = {10.1016/j.catena.2019.01.022},
  URL = {https://www.documentation.ird.fr/hor/fdi:010075495},
}