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Exploring Ectomycorrhizal Communities in Post-Fire Pine Forests

Investigating the diversity and structure of ectomycorrhizal fungi in Douglas-fir seedlings and manzanita post-wildfire. Research based on 36.2cm X 20cm soil cores from 9 plots in a 2.5-hectare region. Analysis shows dominance of Rhizopogon & Ascomycetes. Study delves into Agerer's exploration types and spatial scales diversity. Different sampling methods reveal additional fungal species. AM fungi diversity affects plant communities and ecosystem function. References Bever's negative feedback & Reynolds' nutrient niche models. Parasitism by Tuber melanosporum on oak discussed.

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Exploring Ectomycorrhizal Communities in Post-Fire Pine Forests

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  1. Work by Antonio Izzo Based on 36 2 cm X 20 cm soil cores from a total of 9 plots contained within a 2.5 hectare region. 91 species of EM fungi

  2. Facultative epiparasitism? Douglas-fir seedling and manzanita

  3. Ectomycorrhizal community structure based on root tip colonization Data from mature Pt. Reyes, Bishop pine communities summarized by families.

  4. Tomentella - a little fungus, but a big player

  5. Late stage Fungi ( K ) Early stage Fungi ( r )

  6. Rhizopogon species are dominants in seedling bioassay

  7. Ectomycorrhizal community structure based on root tip colonization Data from mature Pt. Reyes, Bishop pine communities summarized by families.

  8. * Rhizopogon and Ascomycetes dominated the roots of pine seedlings after the Pt. Reyes fire. * * Rhizopogon* * * * * *

  9. Agerer’s Ectomycorrhizal exploration types

  10. Ectomycorrhizal fungi are diverse at multiple spatial scales

  11. Bever et al. 2001 Bioscience 51:926: “No single sampling methodology was able to reveal all of the species at the site. In fact, it seems that each variant on the sampling methodology, whether it be green-house condition of the trap cultures, species of plant host used in the traps, treatment of soil prior to trapping, or season of sampling field soil, would reveal additional fungal species.”

  12. Species diversity of AM fungi effect diversity of plant community and ecosystem function From Van der Heijden et al. 1998

  13. Bever’s negative feedback model

  14. Reynolds et al. - nutrient niche model for P

  15. From Francis and Read 1995

  16. Parasitism of surrounding plants by Tuber melanosporum an ectomycorrhizal fungus on oak

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