Species, populations (meta-), community, habitat, ecosystems. Concepts of flora and vegetation. Abundance and floristic richness. Floristic density. Interpretation of floristic data. Spatial temporal dimension of chorotype. Notions on Biogeography. The 43/92/EEC Directive “Habitat”: Annexes I and II. Natura 2000 Network. Analysis of biodiversity: alfa, beta, gamma;landscape diversity. Spatial scale in landscape ecology. Structure of landscapes: genesis, heterogeneity, patches and matrixes. Landscape dynamics: disturbance and fragmentation. Ecosystem and chorologic functions in the definition of landscapes. Vegetation science as a tool for the analysis and classification of landscapes: analysis of the vegetation.