@article{fdi:010088963, title = {{S}oils surrounding saline-alkaline lakes of {N}hecolandia, {P}antanal, {B}razil : toposequences, mineralogy and chemistry}, author = {{C}osta-{S}ilva, {A}. {R}. and {L}ucas, {Y}. and {R}ezende, {A}. {T}. and {R}amos, {M}. {D}. and {M}erdy, {P}. and {I}shida, {D}. {A}. and {B}arbi{\'e}ro, {L}aurent and {M}elfi, {A}. {J}. and {M}ontes, {C}. {R}.}, editor = {}, language = {{ENG}}, abstract = {{T}he {N}hecolandia subregion of the {B}razilian {P}antanal, subject to a highly seasonal climate, hosts a diverse range of freshwater and saline-alkaline lakes. {T}he latter can be green due to cyanobacterial bloom, black due to dissolved organic matter, or crystalline. {O}ver the past two decades, numerous studies in the region have explored the connections between the lake type, the surrounding soils, and water table dynamics. {H}owever, these insights emerged from independent studies conducted at multiple sites, making their synthesis challenging and leaving questions about the differences between lake types. {O}ur research focuses on a representative {N}hecolandia site, aiming to comprehensively understand soil and lake genesis and dynamics. {F}or each lake type, we conducted detailed toposequence soil studies, assessing particle size distribution, chemistry and mineralogy of the <2 mm fraction of identified horizons. {A} 49-month temporal study utilizing {P}lanet{S}cope satellite data examined lake connections to the hydrographic network affected by seasonal flooding. {O}ur findings confirmed the general organization and mineralogy of soils around saline-alkaline lakes. {N}otably, we identified variations in soil toposequences corresponding to different lake type. {T}wo types of silcrete were observed: one acidic, found at the upper slopes, and the other alkaline, located at the lower slopes. {W}e determined that, for endorheism and lake alkalinization, the presence of a ridge around a lake is insufficient. {I}nstead, deep impermeable horizons in the lower portion of the toposequences are essential. {A}dditionally, crystalline lakes differentiate from black and green ones due to less efficient hydraulic isolation. {O}ur comprehensive dataset from a single site provides a valuable resource for guiding and developing more specific studies on these alkaline systems.}, keywords = {{P}antanal ; {N}hecolandia ; {A}renosols ; {S}olonetz ; {S}ilcrete ; {P}etroduric ; horizon ; {BRESIL}}, booktitle = {}, journal = {{G}eoderma {R}egional}, volume = {36}, numero = {}, pages = {e00746 [16 ]}, ISSN = {2352-0094}, year = {2024}, DOI = {10.1016/j.geodrs.2023.e00746}, URL = {https://www.documentation.ird.fr/hor/fdi:010088963}, }