Sequence of Macromycetes on decaying beech logs

Development of the macromycete flora of windfall beech logs in different stages of decay were studied over 10 years. The occurrence of 48 species found on more than six logs are discussed in relation to five 5-year periods of progressing decomposition. The first period has several distinctive species confined to hard bark and fresh wood. Also the second period with desquamating bark has distinctive taxa. Polyporaceous species have a slight dominance in this period, while saprophytic agarics are more frequent in the later periods. Many species, including Armillaria mellea, Fomes fomentarius and other necrotrofic parasites are met in all 5-year periods. The final stage of decay is characterized by slow invasion of species of the forest floor.