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@PhDThesis{Cordeiro:2016:AnCoVe,
               author = "Cordeiro, Carlos Leandro de Oliveira",
                title = "An{\'a}lise da cobertura vegetal no megaleque Viru{\'a}, norte 
                         da Amaz{\^o}nia",
               school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
                 year = "2016",
              address = "S{\~a}o Jos{\'e} dos Campos",
                month = "2016-03-29",
             keywords = "megaleque, campinarana, Amaz{\^o}nia, processos sedimentares, 
                         megafan, Amazonia, depositional processes.",
             abstract = "A maior parte das campinaranas amaz{\^o}nicas est{\'a} 
                         concentrada no Pantanal Setentrional, que corresponde a uma bacia 
                         sedimentar quatern{\'a}ria do interfl{\'u}vio dos rios Negro e 
                         Branco. Estudos recentes registraram a associa{\c{c}}{\~a}o 
                         dessa vegeta{\c{c}}{\~a}o com dep{\'o}sitos sedimentares de 
                         sistemas de megaleques. O megaleque mais investigado at{\'e} o 
                         momento {\'e} o do Viru{\'a}, situado na margem esquerda do rio 
                         Branco, sudeste de Roraima. O objetivo principal desta tese foi 
                         avaliar como a forma{\c{c}}{\~a}o do megaleque Viru{\'a} 
                         influenciou na distribui{\c{c}}{\~a}o da biodiversidade 
                         florestal. Os objetivos espec{\'{\i}}ficos foram: mapear em 
                         detalhe o mosaico ambiental da {\'a}rea de estudo com 
                         t{\'e}cnica de classifica{\c{c}}{\~a}o orientada a objeto 
                         (OBIA) e minera{\c{c}}{\~a}o de dados (MD); avaliar a 
                         influ{\^e}ncia do megaleque na diversidade local e regional com 
                         base em invent{\'a}rios de campo e dados de sensoriamento remoto; 
                         avaliar o potencial de dados LiDAR port{\'a}til terrestre nas 
                         estimativas de par{\^a}metros fitoestruturais de campinaranas 
                         florestadas; e integrar t{\'e}cnicas de sensoriamento remoto com 
                         dados de is{\'o}topos de carbono no mapeamento de os tipos de 
                         gram{\'{\i}}neas sobre o megaleque. O estudo revelou que os 
                         dados {\'o}ticos e de radar s{\~a}o importantes no mapeamento do 
                         mosaico ambiental de megaleques, possibilitando precis{\~a}o 
                         global de at{\'e} 88\%. O levantamento flor{\'{\i}}stico 
                         mostrou alta diversidade com 362 esp{\'e}cies documentadas. 
                         Por{\'e}m, apenas 3,3\% dessas esp{\'e}cies s{\~a}o 
                         compartilhadas entre o interior e o exterior do megaleque, 
                         indicando que a floresta ombr{\'o}fila do entorno n{\~a}o {\'e} 
                         fonte principal das esp{\'e}cies florestais registradas no 
                         megaleque. O LIDAR port{\'a}til mostrou ser um m{\'e}todo 
                         r{\'a}pido e barato na previs{\~a}o de par{\^a}metros 
                         fitoestruturais de campinaranas, comoaltura de {\'a}rvores, 
                         di{\^a}metro {\`a} altura do peito (DAP) e biomassa. O 
                         mapeamento integrando imagens Landsat e is{\'o}topos de carbono 
                         mostrou dom{\'{\i}}nio de gram{\'{\i}}neas C3 no megaleque. O 
                         contexto geol{\'o}gico e a morfologia do megaleque Viru{\'a} 
                         foram os principais par{\^a}metros para o surgimento e a 
                         manuten{\c{c}}{\~a}o de sua cobertura vegetal de campinaranas. 
                         Os ambientes estressantes impostos por dep{\'o}sitos arenosos 
                         inundados dos megaleques s{\~a}o barreiras para a ocorr{\^e}ncia 
                         de esp{\'e}cies da floresta ombr{\'o}fila, e favorecem a 
                         coloniza{\c{c}}{\~a}o por esp{\'e}cies n{\~a}o comuns na 
                         regi{\~a}o, aumentando a diversidade de esp{\'e}cies. 
                         Internamente aos megaleques, morfologias locais representativas de 
                         subambientes deposicionais, tais como canais, diques, leques de 
                         transbordamento, barras e dunas, explicam a 
                         distribui{\c{c}}{\~a}o dos v{\'a}rios tipos de campinaranas. 
                         ABSTRACT: Most of the Amazonian campinarana is concentrated in the 
                         Pantanal Setentrional, which corresponds to a Quaternary 
                         sedimentary basin in the the interfluve of the Negro and Branco 
                         Rivers. Recent studies recorded the association of this vegetation 
                         with sedimentary depositsrepresentative of a megafansystem. The 
                         megafan currently most investigated so faris the Viru{\'a} 
                         megafan, located atthe left margin of the Branco River, southeast 
                         of the state of Roraima. The main objective of this thesis was to 
                         evaluate how the formation of the Viru{\'a} megafan influenced 
                         the distribution of forest biodiversity. Specific objectives were: 
                         to map in detail the environomental mosaic of the study area 
                         applying object-based image analysis (OBIA) and data mining (DM); 
                         to evaluate the influence of the megafan in the local and regional 
                         diversity based on field inventories and remote sensing data; to 
                         evaluate the potential of terrestrial portable LIDAR system data 
                         on estimatives of vegetation structure parameters of forest 
                         campinaranas; and to integrate remote sensing with carbon isotope 
                         data in order to mapgrassland types onthe megafan. The study 
                         revealed that optical and radar data are important for mapping the 
                         environmental mosaic of megafans, enabling overall accuracy of up 
                         to 88\%. The floristic survey showed high diversity, with 362 
                         species being documented. However, only 3.3\% arespecies shared 
                         between the inner and pouter megafan, indicating that the 
                         ombrophilous forest is not the main source of the forest species 
                         recorded in the megafan. The portable LIDAR proved to be a quick 
                         and inexpensive method in predicting vegetation structure 
                         parameters of campinarana vegetation, such astree height, diameter 
                         at breast height (DBH) and biomass. Mapping integrating Landsat 
                         images and carbon isotopes showed domain of C3 grasses in megafan. 
                         The geological and morphological contexts of the Viru{\'a} 
                         megafan were main parameters for establishment and maintenance of 
                         of its campinarana vegetation cover. The stressful environments 
                         imposed by the megafan flooded sandy deposits constitute barriers 
                         to the occurrence of ombrophilous forest species, and favor 
                         colonization by species not common in the region, increasing 
                         species diversity. Internally to megafans, local morphologies 
                         representative of depositional sub-environments, such as channels, 
                         dikes, overbank sand sheets, bars and dunes, explain the 
                         distribution of various campinarana types.",
            committee = "Rossetti, Dilce de F{\'a}tima (presidente/orientadora) and 
                         Galv{\~a}o, L{\^e}nio Soares and Santos, Jo{\~a}o Roberto dos 
                         and Gribel, Rog{\'e}rio and Almeida, Teodoro Isnard Ribeiro de",
           copyholder = "SID/SCD",
         englishtitle = "Vegetation cover analysis in the Viru{\'a} megafan (north of 
                         Amazonia)",
             language = "pt",
                pages = "175",
                  ibi = "8JMKD3MGP3W34P/3L9BU6B",
                  url = "http://urlib.net/rep/8JMKD3MGP3W34P/3L9BU6B",
           targetfile = "publicacao.pdf",
        urlaccessdate = "29 nov. 2020"
}


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