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@Article{RossettiGrCoVaTaYe:2019:RoLaPl,
               author = "Rossetti, Dilce de F{\'a}tima and Gribel, Rog{\'e}rio and Cohen, 
                         Marcelo Cancela Lisboa and Valeriano, M{\'a}rcio de Morisson and 
                         Tatumi, Sonia Hatsue and Yee, M{\'a}rcio",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas da Amaz{\^o}nia (INPA)} and {Universidade 
                         Federal do Par{\'a} (UFPA)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Universidade Federal de S{\~a}o Paulo 
                         (UNIFESP)} and {Universidade Federal de S{\~a}o Paulo 
                         (UNIFESP)}",
                title = "The role of Late Pleistocene-Holocene tectono-sedimentary history 
                         on the origin of patches of savanna vegetation in the middle 
                         Madeira River, southwest of the Amazonian lowlands",
              journal = "Palaeogeography, Palaeoclimatology, Palaeoecology",
                 year = "2019",
               volume = "526",
                pages = "136--156",
                month = "July",
             keywords = "Sedimentary processes, Late Pleistocene-Holocene, Environmental 
                         control, Savanna vegetation, Amazonian lowlands.",
             abstract = "Savanna patches are features of the Amazonian landscape that have 
                         been long under intense debate, but there are still questions 
                         about the main factors that have determined their establishment 
                         and evolution within the rainforest matrix. In particular, their 
                         geological substrates were poorly documented. The aim of this work 
                         is to reconstruct the tectono-sedimentary history of four savanna 
                         patches in the middle Madeira River, southwest Amazonia, and 
                         discuss its potential control over the development of the savanna 
                         communities. The approach consisted in the integration of 
                         geomorphological, sedimentological, chronological and floristic 
                         data. The results revealed that the savanna substrates are sandy 
                         deposits aged between 118.9 and 35.6 ky, overlain by late 
                         Pleistocene to Holocene muddier successions <25,700 cal yr BP. 
                         Most of the geologically stable and topographically higher 
                         terrains of the geomorphological unit T1 is dominated by forests. 
                         These intermingle with open habitats formed by renewed 
                         sedimentation that were colonized by tree and shrub species of the 
                         Amazonian biome. By contrast, the ground of unit T2 subsided to a 
                         level that allowed the meandering of the main river. This process 
                         resulted in the replacement of the rainforest by open habitats 
                         dominated by savannas with lower richness and diversity than in 
                         the T1 unit, which were dominated by species with wide 
                         distribution in the cerrado biome of Central Brasil. The cerrado 
                         species might have expanded into this region during Pleistocene 
                         drier climatic episodes, but environmental filters shaped by 
                         geological processes determined the floristic contrasts between 
                         units T1 and T2. The lack of competition with Amazonian species 
                         probably constituted an important factor for the preferential 
                         colonization of arboreal and shrubby species from neighboring 
                         cerrados on meandering scroll bars, marginal levees and crevasse 
                         splays of unit T2.",
                  doi = "10.1016/j.palaeo.2019.04.017",
                  url = "http://dx.doi.org/10.1016/j.palaeo.2019.04.017",
                 issn = "0031-0182",
             language = "en",
           targetfile = "1-s2.0-S0031018218307132-main.pdf",
        urlaccessdate = "29 nov. 2020"
}


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