Evolució recent del paisatge agrari de l'Alt Empordà a través de la teledetecció i d'índexs paisatgístics

Abstract

This paper presents the methodology and analysis of satellite imagery of the evolution of land covers and land uses in twenty-one municipalities of the Alt Empordà. It covers the period from 1977 to 1997 and quantifies its evolution by using some indexes from landscape ecology that assess the level of fragmentation and compactness. The results show us first the increase on the level of compactness for the abandonment of vineyards and olive trees due to the effects of fires. Second, the increase of the level of fragmentation on winter cereals due to the homogenization of corn and sunflower fields heavily subsidized by the Common Agricultural Policy of the European Union.