Grazing effects on the sustainability of an oak coppice forest

In Greece, deciduous oak forests usually provide both, wood production and grazing of understory vegetation. Grazing as a management tool was assayed in a deciduous oak coppice forest of 2000 ha under conversion during the management period of 1991-2005 in Central Macedonia, Greece. In this forest, 1340 cows and 3880 goats were grazing from May to October along the years. The impact of grazing pressure on forest growth was related to the difference of the overall wood stock in two sampling times conducted during the management period of 1991 and 2005. Three grazing pressures were distinguished in the forest: heavy, moderate and light. The moderate grazing improved tree growth and provided significant wood production during the management period. It has also resulted in a sustainable production of herbage and browse in the understory, supporting the maintenance of the livestock. It seems that the conversion of a deciduous oak coppice forest to a high forest along with livestock grazing in the understory is a very efficient management scheme for sustainable production in such a forest.