Dynamics of macrofungi in two moist heathlands in Drenthe, The Netherlands

In two plots, dominated by Erica tetralix and Molinia caerulea, respectively, carpophores of macrofungi were counted during 7 successive years with fortnightly intervals. The changes in the number of species, number of carpophores, carpophore productivity and productivity of dominant species are described and discussed. In addition, the periodicity of some species is treated. It appears that quantitative and qualitative changes in the two stands do not parallel each other. The changes are mainly interpreted as fluctuations, whereas in the Molinia stand also successional trends are demonstrated. Also between the investigated species important differences exist. No simple relationships could be found with the prevailing weather conditions.