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A visao sinotica proporcionada pelas imagens de satelite, aliada as diversas resolucoes espaciais, temporais e radiometricas dos sensores disponiveis, sao capazes de subsidiar informacoes sobre a cobertura terrestre. Nesse contexto muitas pesquisas estao voltadas a compreensao da dinâmica de formacoes vegetais, devido ao fato de que atraves da observacao do comportamento de cada ecossistema e possivel inferir a elaboracao de estrategias que preservam os recursos florestais. Este trabalho propos utilizar dados NDVI e EVI do sensor MODIS na observacao da dinâmica de duas formacoes vegetais presentes no Parque Estadual Lapa Grande em Montes Claros. Os dois indices analisados se mostraram coerentes com o padrao normalmente apresentado por essas formacoes em outros estudos realizados. O EVI exibiu valores inferiores aos de NDVI, devido a este ser menos sensivel as contaminacoes do substrato e da atmosfera. Os valores de reflectância dos indices acompanharam as demarcacoes das estacoes chuvosas e secas, da area de estudo. De forma geral, os indices de vegetacao, NDVI e EVI do produto MOD13Q1, foram eficientes na observacao da variacao sazonal das formacoes florestais em estudo, muito devido a alta qualidade dos produtos MODIS e sua alta periodicidade, tornando a metodologia eficiente para um acompanhamento da dinâmica dessas fitofisionomias. 800x600 Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Calibri","sans-serif";} The synoptic vision afforded by satellite images, combined with the various resolutions spatial, temporal and radiometric characteristics of available sensors, are able to subsidise information about the terrestrial coverage. In this context many researches are focused on understanding the dynamics of vegetal formations, due to the fact that through the observation of the behavior of each ecosystem is possible to infer the elaboration of strategies that preserve the forest resources. This study proposed to use data NDVI and EVI MODIS sensor on the observation of the dynamics of two vegetal formations present in Parque Estadual da Lapa Grande in Montes Claros. The two indices analyzed if showed consistent with the pattern usually presented by these formations in other studies. The EVI exhibited values lower than those of NDVI, due to this being less sensitive to contamination of the substrate and the atmosphere. The values of reflectance indices accompanied the demarcations of rainy seasons and dry, at the study area. In a general way, the indices of vegetation, NDVI and EVI product MOD13Q1, were efficient in the observation of the seasonal variation of forest formations in study, much due to the high quality of MODIS products and their high frequency, making efficient methodology for monitoring the dynamics of these physiognomies. Keywords: Deciduous Forest, Remote Sensing, NDVI, EVI.

Análise do Comportamento Espectral de Fitofisionomias no Parque Estadual Lapa Grande por meio de dados MODIS (Analysis of the Spectral Behavior of Physiognomies in Parque Estadual da Lapa Grande by means of MODIS data)