Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/1118
Título: Assessing riparian vegetation structure and the influence of land use using landscape metrics and geostatistical tools
Outros títulos: Avaliação da estrutura ripária e da influência do uso do solo com base em métricas de paisagem e geoestatistica
Autor: Fernandes, Maria do Rosário Pereira
Orientador: Cardoso, Maria Teresa Ferreira da Cunha
Palavras-chave: riparian landscapes
human disturbance
spatial metrics
autocorrelation
Portugal
galerias ribeirinhas
pressões antropogenicas
metricas espaciais
autocorrelação
Data de Defesa: 2009
Resumo: The present work aims to identify potential landscape metrics that best describe and quantify the riparian structure and evaluate its response to land use pressure. The study was conducted in four rivers of the Tagus fluvial system Data was achieved from the on-screen photo interpretation of airborne digital images. Eight landscape metrics related with the spatial configuration, isolation, inter-connectivity and distribution of riparian vegetation were calculated for the tree, shrub and herbaceous strata. The influence of proximal and distal land use (30 m and 200 m buffers, respectively) in the riparian structure was analysed using redundancy analysis. Geostatistical analysis were used to describe and incorporate the spatial component of the data and to assess the spatial autocorrelation of the riparian structure. The results showed that the combined interpretation of metric values can consistently describe the patterns of riparian structure especially for the tree cover class. Disturbed riparian woods due to major land use pressure, such as agriculture, presented a low number of small patches with simple and homogenous shapes, reduced patch connectivity and a non interspersed patch distribution. Also it is shown that the proximal land use is more determinant in shaping within-stand riparian structure, therefore protection areas should both envelop riparian zones and an adjacent buffer.
Descrição: Mestrado em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/1118
Aparece nas colecções:BISA - Dissertações de Mestrado / Master Thesis

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
Tese Mestrado.pdf373,83 kBAdobe PDFVer/Abrir


FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.