Landscapes Forest and Global Change - ESA - Escola Superior ...

I. Duarte & F.C. Rego 2010. Land use changes in Portugal between 1990 and 2005
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On this study, we analyze the changes on soil occupancy in continental Portugal. The index of
persistence obtained was 51%. Pinto Correia et al (2006), calculated between 1990 and 2000,
for the same territory, a persistence index of 86,7 %. It means that in the last five years, changes
were accelerated.
The general trends, despite all the incentives for forestation in recent decades, were for the
decrease of forest area and increase of shrublands areas. Eucalyptus and irrigated agriculture
also increased. Also occurred one slight increase in artificial areas, such as in other agriculture.
The dynamical model identified let us concerned about the trends in portuguese and all
mediterranean territory, because of the forest degradation and losses of natural values as corks
forests and unirrigated agriculture. On the other hand, perhaps this is a time of change, of
reflection, similar to the socio-economic reflexion of the day.
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