Ecological study of corticioid and polyporoid fungi on deathwood in compove of a natural reserve and a cultivated forest.

摘要

The ecology of corticioid and polyporoid fungi of an Upper Bavarian beech forest (Hordelymo-Fagetum) has been studied in detail. 14 small areas (10 m x 10 m), being placed inside the nature reserve forest "Schonwald" (North of the lake Ammersee, Upper Bavaria). Additionally 9 areas (10 m x 10 m), being placed in a cultivated forest lying nearby, have been investigated for comparison. All fruit bodies of corticioid and polyporoid fungi occurring in these areas have collected and the ecological parameters (e.g., decomposition, diameter, species of the substrate) are noted for a statistical analysis. Altogether 162 species of wood inhabiting corticioid and polyporoid fungi could be found on these 23 small areas. A connection between the fungal species composition and the supply of dead wood was tried to be shown in this study. The results offer no clear correlation between the amount of dead wood and the species richness of the plot. However, the correspondence analysis (DCA) shows a similar fungal species composition in plots with similar supply of dead wood indicating the influence of the supplied substrate on the fungal flora of corticioid and polyporoid fungi. 31 of the 32 most common fungal species detected in the plots produce fruit bodies even on rather thin wooden substrate (diameter less then 4 cm). Only Fomes fomentarius doesn't occur on wood with a diameter of less then 14 cm inside the investigated plots. Also a not identified Mycoacia sp. Was exclusively found on wood of bigger diameters. Medium decomposed wood (optimal phase of decomposition) showed the highest species richness and abundance..