increasing intervention pressure on the forest, the necessity of
relying on techniques and indicators that allow to evaluate and
understand better the complex phenomena that affects natural resources
was carried out as a form of contributing to the sustainable management.
The impact generated on the native forest of the Province of Valdivia
by secondary and primary access roads is analyzed. In agreement
with other studies, it is appreciated that the most significant
impact on the forest is produced within 3 kilometers from the border
of the road, becoming intervened up 22% of the original surface.
A synthetic index is developed through a model of regression logistics
that esteems the more vulnerable to the intervention evaluated from
a historic view point. The slope of the land, the altitude above
sea level, the distance from the roads, the soil type and the percentage
of people that live in rural zones are the variables that better
explain the existence of interventions in the forest. The analysis
of the geographical zones and the variables in studied was carried
out through an Analysis for Principal Components, being an adequate
technique in order to evaluate the importance of the variables and
their relationship with the spatial component.
Tésis disponible en la Biblioteca de la Universidad Austral