30-Year Changes in Oak-Hornbeam Forest after Windthrow

Hurricane winds are one of the most important abiotic factors in shaping structure forest and processes that occur it. The aim research was to determine regeneration changes stands caused by windstorm 1983. research, based on stand tables from years 1982, 1984, 1989 2014, carried out nine permanent plots Bia?owie?a Forest. mean number trees (MNT) taller than 1.30 m decreased 13.7% after windstorm. In MNT increased compared 1984 (142%) (53%). A significant decrease share Picea abies (L.) H. Karst., thicker 7 cm DBH a increase Carpinus betulus L. observed. Species richness for indicated significantly lower species 1982 (12 species) (14) 2014 (16). did not have direct effect richness, composition or distinguished tree layers, except 55 DBH. observed density layers prove process does start immediately continues even 30 Intermediate-severity windthrow accelerated natural structure.