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@Article{RossettiGriTuoCorTat:2018:InLaQu,
               author = "Rossetti, Dilce de F{\'a}tima and Gribel, Rog{\'e}rio and 
                         Tuomisto, Hanna and Cordeiro, Carlos L. O. and Tatumi, Sonia H.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas da Amaz{\^o}nia (INPA)} and {University of 
                         Turku} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade Federal de S{\~a}o Paulo (UNIFESP)}",
                title = "The influence of late Quaternary sedimentation on vegetation in an 
                         Amazonian lowland megafan",
              journal = "Earth Surface Processes and Landforms",
                 year = "2018",
               volume = "43",
               number = "6",
                pages = "1259--1279",
                month = "May",
             keywords = "megafan, sedimentation, late Quaternary, northern Amazonian 
                         lowlands, plant distribution, physiognomy.",
             abstract = "The largest areas of white-sand vegetation in northern Amazonia 
                         are confined to Late Pleistocene-Holocene megafan depositional 
                         systems, which suggest a relationship between the two. The aim of 
                         this work is to determine: (i) the relative role of sedimentary 
                         history and recent ecological processes to explaining the mosaic 
                         of white-sand forest patches, grasslands and shrublands in a 
                         wetland area of northern Amazonia; and (ii) the long-term 
                         successional trajectory that led to the establishment of the 
                         white-sand forest patches. Facies analysis was used to reconstruct 
                         the megafan paleoenvironment; C-13, total organic carbon and 
                         carbon/nitrogen from sedimentary organic matter to reconstruct the 
                         past vegetation; and floristic inventories to characterize the 
                         modern vegetation. The results revealed that the Virua megafan 
                         consists of various sandy sub-environments, including aeolian sand 
                         dunes and sheets developed mostly in the Holocene after the 
                         megafan turned inactive as a depositional site. Dune margins and 
                         tops are colonized by white-sand trees mixed with a few generalist 
                         rain-forest species, whereas adjacent lower-lying areas, which are 
                         affected by seasonal flooding, are covered by graminoid plants 
                         and/or shrubs. The latter initiated their development over the 
                         megafan surface in different times of the Holocene due to 
                         hydrological gradients imposed by the topography of the various 
                         megafan depositional environments, while the white-sand forest 
                         became dominant only on sand dunes over the last few centuries. We 
                         suggest that the late Quaternary sedimentary history was crucial 
                         in creating morphologies that now determine topographic gradients 
                         responsible for different vegetation physiognomies over the 
                         Amazonian lowlands.",
                  doi = "10.1002/esp.4312",
                  url = "http://dx.doi.org/10.1002/esp.4312",
                 issn = "0197-9337",
             language = "en",
           targetfile = "rossetti_influence.pdf",
        urlaccessdate = "24 nov. 2020"
}


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