Oecologia

, Volume 86, Issue 3, pp 349–358

Dynamics of vesicular-arbuscular mycorrhizae during old field succession

  • Nancy Collins Johnson
  • Donald R. Zak
  • David Tilman
  • F. L. Pfleger
Original Papers

DOI: 10.1007/BF00317600

Cite this article as:
Johnson, N.C., Zak, D.R., Tilman, D. et al. Oecologia (1991) 86: 349. doi:10.1007/BF00317600

Summary

The species composition of vesicular-arbuscular mycorrhizal (VAM) fungal communities changed during secondary succession of abandoned fields based on a field to forest chronosequence. Twenty-five VAM fungal species were identified. Seven species were clearly early successional and five species were clearly late successional. The total number of VAM fungal species did not increase with successional time, but diversity as measured by the Shannon-Wiener index tended to increase, primarily because the community became more even as a single species, Glomus aggregatum, became less dominant in the older sites. Diversity of the VAM fungal community was positively correlated with soil C and N. The density of VAM fungi, as measured by infectivity and total spore count, first increased with time since abandonment and then decreased in the late successional forest sites. Within 12 abandoned fields, VAM fungal density increased with increasing soil pH, H2O soluble soil C, and root biomass, but was inversely related to extractable soil P and percent cover of non-host plant species. The lower abundance of VAM fungi in the forest sites compared with the field sites agrees with the findings of other workers and corresponds with a shift in the dominant vegetation from herbaceous VAM hosts to woody ectomycorrhizal hosts.

Key words

VA-mycorrhizaeOld field successionInfectivitySpore populations

Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • Nancy Collins Johnson
    • 1
  • Donald R. Zak
    • 2
  • David Tilman
    • 1
  • F. L. Pfleger
    • 3
  1. 1.Department of Ecology Evolution and BehaviorUniversity of MinnesotaMinneapolisUSA
  2. 2.Department of Ecology Evolution and Behavior and Department of Soil ScienceUniversity of MinnesotaSt. PaulUSA
  3. 3.Department of Plant PathologyUniversity of MinnesotaSt. PaulUSA