Succession is among the most important
ecological concepts. Glacier forefronts provide a unique system for studying
primary succession of plants and fungi. In this study, we gathered comprehensive
data on fungal fruiting on a glacier forefront over a period of nine years
and 16 expeditions. Data on chronosequence of vascular plants was also
collected to provide data on the communities allowing fruiting of the heterotrophic
fungi. Based on frequencies of occurrence, pattern of change in plant communities
from an open, non-vegetated community to an ericaceous meadow community
was similar to the descriptive model proposed earlier. However, coniferous
component, visually dominant in later states, did not appear important.
The fruiting of saprophytic fungi took place soon after first clusters
of plants had established. As many of the saprobes are fruiting on the
nonvegetated, moist pond and stream banks, we hypothesize that these saprophytes
may survive on residual organic debris (spores, pollen and algae) from
surrounding plant communities accumulating in the water and the pond and
stream bank habitats. The mycorrhizal fungi established and reproduced
as soon as the first host plants were present. The diversification of the
mycorrhizal fungal community resulted likey from increased number of host
plants as well as changing physical attributes rather than the increasing
age of the host plants.
The forefront of the receding glacier is a fabulous study system to follow substrate related patterns in fungal communities.