Acta Botanica Brasilica
versão impressa ISSN 0102-3306
BISPO, Polyanna da Conceição; VALERIANO, Márcio de Morisson e KUPLICH, Tatiana Mora. Relationship between morphometric variables extracted from SRTM (Shuttle Radar Topography Mission) data and vegetation in Brasília National Park. Acta Bot. Bras. [online]. 2010, vol.24, n.1, pp.96-103. ISSN 0102-3306. http://dx.doi.org/10.1590/S0102-33062010000100010.
This paper aims to study the relationship between the distribution of vegetation in Brasilia National Park and topographic variables, to evaluate the potential of SRTM data alone, in addition to data traditionally used in remote sensing of vegetation. A map of vegetation of the area was used as a reference and the morphometric variables (elevation, slope, aspect and profile and plane curvatures) were compared to the mapped units. Analyses indicated vegetation types easily discriminated depending on topographic position. The variables elevation, slope and aspect were shown to be the most important for their high discrimination power of the vegetation types. Although morphometric data are recognized as having strong potential for characterizing vegetation, this was not shown in the results, due to the mismatching of variability scales between the two sources of data, where large units tend to exhibit similar distribution patterns of morphometry, and comprise classes with different responses for morphometric constraints. Discriminant analyses of morphometric variables allowed vegetation mapping up to sub-physiognomy levels.
Palavras-chave : topography; vegetation; Brazilian Cerrado; SRTM; Brasilia National Park.