Título:	Estimativa de biomassa e combustível em diferentes fitofisionomias do Cerrado
Autor(es):	Granado, Larissa Moreira Alves
Orientador(es):	Pereira, Reginaldo Sérgio
Assunto:	Índice de vegetação Cerrados Cerrados - vegetação Biomassa vegetal Combustível vegetal
Data de publicação:	27-Dez-2019
Data de defesa:	25-Fev-2019
Referência:	GRANADO, Larissa Moreira Alves. Estimativa de biomassa e combustível em diferentes fitofisionomias do Cerrado. 2019. 71 f., il. Dissertação (Mestrado em Ciências Florestais)—Universidade de Brasília, Brasília, 2019.
Abstract:	Despite all of the ecological importance of Cerrado, the biome has been suffering drastically with deforestation and antropical activities that have been significantly altering the fire regime, may they be by the direct practice of soil usage or indirectly, caused by climate changes. Because of these transformations, the Cerrado is one of the most threatened vegetal biomes of South America and demands improvement in the creation of management and conservation policies. The knowledge of the vegetal formations, alongside the quantification of biomass and the fuel load, can help in the control and preservation, because it provides input for the management in Cerrado areas. Therefore, the objective of this research is to evaluate the relation between the vegetation indexes, the aerial biomass and the fuel in order to generate an equation that can capture the variation of the variables inside the different Cerrado physiognomies. To do that, a regression between the biomass and the vegetation indexes was generated, in which the biomass was estimated from allometric equations and the vegetation indexes were estimated based ont the satellites RapidEye and LandSat 5 TM. The precision of the equations was evaluated by the correlation between the estimated and the observed values (r2), by the standard error from the mean (E) and by the distribution of the residue graphics. After this analysis, a new regression was made, correlating the biomass with the fuel. It was possible to obtain the map of covering of the aerial biomass and the fuel from the equations generated. The results show that the regression equations for the aerial biomass quantification and the fuel presented significant statistical values. The Enhanced Vegetation Index (EVI), with R²= 0,77 and E =51,1%, was the best index for biomass estimation from the satellite LandSat 5 TM and the Normalized Difference Red-Edge Index (NDRE), with R² = 0,87 and E= 30,39%, was the best index for biomass estimation from the satellite rapideye. Based on the biomass values, an equation for an estimate variation of fuel in the phytophysiognomies was generated. The equation presented R² = 0,78 and standard error from the mean of 18%, therefore, the vegetation indexes were effective on the biomass and fuel estimates for different Cerrado phytophysiognomies. Using this data, maps of aerial biomass and fuel were generated. Such information is fundamental for the definition of management, control and prevention of wildfires policies and even to the mitigation of the greenhouse effect gas emissions.
Unidade Acadêmica:	Faculdade de Tecnologia (FT) Departamento de Engenharia Florestal (FT EFL)
Informações adicionais:	Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Florestal, Programa de Pós-Graduação em Ciências Florestais, 2019.
Programa de pós-graduação:	Programa de Pós-Graduação em Ciências Florestais
Licença:	A concessão da licença deste item refere-se ao termo de autorização impresso assinado pelo autor com as seguintes condições: Na qualidade de titular dos direitos de autor da publicação, autorizo a Universidade de Brasília e o IBICT a disponibilizar por meio dos sites www.bce.unb.br, www.ibict.br, http://hercules.vtls.com/cgi-bin/ndltd/chameleon?lng=pt&skin=ndltd sem ressarcimento dos direitos autorais, de acordo com a Lei nº 9610/98, o texto integral da obra disponibilizada, conforme permissões assinaladas, para fins de leitura, impressão e/ou download, a título de divulgação da produção científica brasileira, a partir desta data.
Aparece nas coleções:	Teses, dissertações e produtos pós-doutorado

Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.