Reestablishment of endogonaceae on Mount St. Helens: survival of residuals
The 18 May 1980 eruption of Mount St. Helens resulted in the burial of relatively well developed soils under variable depths of sterile tephra and ash. During summer 1982, we examined a series of sites and estimated the numbers of spores of Endogonaceae that had been transported from the buried soil to the new ground surface by either abiotic or biotic vectors. There was no difference between spore counts of Endogone spp. or Glomus spp. in the buried soils of forests and clear-cuts; spores were rare in the tephra at any site. In areas featuring less than or equal to 50 cm of tephra, spores were transported to the surface by gophers (in previous clear-cut areas) and by ants (in previous forest and clear-cut habitats). In the Pumice Plain, an area devoid of gophers and ants, erosion exposed spores to the surface. We found no evidence to suggest that endogonaceous fungi grow back up root systems from buried horizons. We hypothesize that small-scale perturbations (erosion, gopher and ant mounds) following the major volcanic disturbance may drive succession by exposing buried mycorrhizal and decomposer fungi. 26 references, 2 figures, 3 tables.
- Research Organization:
- Utah State Univ., Logan
- OSTI ID:
- 5960959
- Journal Information:
- Mycologia; (United States), Vol. 76:6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
58 GEOSCIENCES
MT ST HELENS
ECOLOGICAL SUCCESSION
VOLCANOES
ENVIRONMENTAL EFFECTS
BIOLOGICAL PATHWAYS
ERUPTION
EXPERIMENTAL DATA
FUNGI
MYCORRHIZAS
POPULATION DYNAMICS
TERRESTRIAL ECOSYSTEMS
CASCADE MOUNTAINS
DATA
ECOSYSTEMS
FEDERAL REGION X
INFORMATION
MOUNTAINS
NORTH AMERICA
NUMERICAL DATA
PLANTS
USA
WASHINGTON
510100* - Environment
Terrestrial- Basic Studies- (-1989)
580202 - Geophysics- Volcanology- (1980-1989)