Communities of wood-inhabiting fungi: Ecological requirements and responses to forest management and fragmentation Jenni Hottola Department of Biological and Environmental Sciences Faculty of Biosciences University of Helsinki Finland Academic dissertation To be presented for public examination with the permission of the Faculty of Biosciences of the University of Helsinki in the Auditorium 1401 in Biocenter 2 (Viikinkaari 5) on December 18th 2009 at 12 o´clock noon.