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Seasonal Distribution of Ectomycorrhizae in a Mature Douglas-fir/Larch Forest Soil in Western Montana

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Counts of individual ectomycorrhizal root tips from random soil core samples showed that the greatest number occurred during May and June in the organic soil fractions. Soil humus provided the major substrate for ectomycorrhizae throughout the year except during July and August. During this drier period, more active ectomycorrhizal tips occurred in the decayed soil wood. Moisture levels were higher in the decayed wood than the humus at that time. Decayed wood may serve a critical role in supporting ectomycorrhizae in the soils of mature Douglas-fir/larch forests, particularly during periods of limited moisture availability. Forest Sci. 24:203-208.

Keywords: Soil microbiology; charcoal; decayed wood; humus; moisture availability; mycorrhizae; prescribed fire; residue; water relations; wildfire

Document Type: Journal Article

Affiliations: Mycologist, U.S. Department of Agriculture, Forest Service, Center for Forest Mycology Research, Forest Products Laboratory, Madison, Wisconsin 53705

Publication date: 1978-06-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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