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Avaliação da composição e estrutura ripária Mediterrânica baseada em SIG e detecção remota
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Autores
Resumo(s)
Riparian forests are responsible for many functions considered essential to the preservation of the
ecological condition of fluvial corridors. The aim of this thesis is to characterize the structural and
compositional patterns of the riparian vegetation in relation to its ecological quality using remote
detection and geographic information systems.
Separability analyses allowed to characterize and distinguish the spectral patterns and divergent optical
behavior between the main riparian forests of Portugal. Spectroradiometry analyses enable the
identification of the optimal bands for the remote detection of the alien invasive species Arundo donax,
giant reed, from the surrounding vegetation, taking into account its seasonal spectral variability.
The Geostatistical techniques combined with the application of landscape metrics, in high spatial
resolution images, allowed the remote identification of the structural patterns for riparian forests and
for the riparian areas invaded by the giant reed. It was obtained a relation between the observed
degradation patterns and a gradient of human disturbance in the surrounding areas of fluvial corridors.
The combination of the spectral and geometric attributes allowed to increasing giant reed mapping
accuracy in riparian habitats, using a semi-automatic technique.
Descrição
Doutoramento em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia
Palavras-chave
riparian vegetation remote detection ecological condition optical traits spectral and geometric attributes
Contexto Educativo
Citação
Fernandes, M.R.P. - Avaliação da composição e estrutura ripária Mediterrânica baseada em SIG e detecção remota. Lisboa: ISA, 2013, 185 p.