Moser, A. Mariah , DAllura, Jad , Southworth, Darlene .
Patterns of ectomycorrhizal communities associated with Quercus garryana on serpentine soils.
SERPENTINE soils select for unique plant communities and for endemic species. Because mycorrhizas link plants to soil, we compared the ectomycorrhizal communities of Oregon white oak (Quercus garryana) on serpentine and nonserpentine soils in southwestern Oregon. Ectomycorrhizas were identified by morphotyping based on descriptions of microscopic characters and by phylotyping based on DNA sequences and patterns of restriction fragment length polymorphisms. Serpentine soils were characterized by high concentrations of Ni, Cr, and Fe and by a lower Ca:Mg ratio. Species richness and evenness were similar on both soil types. Serpentine soils did not have depauperate mycorrhizal communities. Serpentine and nonserpentine soils differed in the most abundant species present, but sites with the same soil type also varied in the most abundant species. The broad taxonomic categories of mycorrhizal fungi were equally represented on serpentine and nonserpentine soils. Pigmented species were equally abundant on both soils. The species richness on serpentine sites was similar to that in other ectomycorrhizal communities on oaks. Overall, variability of the ectomycorrhizal community was as great between sites as it was between serpentine and nonserpentine soils.
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1 - Southern Oregon University, Department of Biology, 1250 Siskiyou Blvd, Ashland, Oregon, 97520-5010, USA
Presentation Type: Poster:Posters for Sections
Location: Auditorium/Bell Memorial Union
Date: Tuesday, August 1st, 2006
Time: 12:30 PM