Skip to Main Content
Ectomycorrhizal communities of ponderosa pine and lodgepole pine in the south-central Oregon pumice zoneAuthor(s): Maria O. Garcia; Jane E. Smith; Daniel L. Luoma; Melanie D. Jones
Source: Mycorrhiza. 26(4): 275-286
Publication Series: Scientific Journal (JRNL)
Station: Pacific Northwest Research Station
Download Publication (1.0 MB)
DescriptionForest ecosystems of the Pacific Northwest of the USA are changing as a result of climate change. Specifically, rise of global temperatures, decline of winter precipitation, earlier loss of snowpack, and increased summer drought are altering the range of Pinus contorta. Simultaneously, flux in environmental conditions within the historic P. contorta range may facilitate the encroachment of P. ponderosa into P. contorta territory. Furthermore, successful pine species migration may be constrained by the distribution or co-migration of ectomycorrhizal fungi (EMF). Knowledge of the linkages among soil fungal diversity, community structure, and environmental factors is critical to understanding the organization and stability of pine ecosystems. The objectives of this study were to establish a foundational knowledge of the EMF communities of P. ponderosa and P. contorta in the Deschutes National Forest, OR, USA, and to examine soil characteristics associated with community composition. We examined EMF root tips of P. ponderosa and P. contorta in soil cores and conducted soil chemistry analysis for P. ponderosa cores. Results indicate that Cenococcum geophilum, Rhizopogon salebrosus, and Inocybe flocculosa were dominant in both P. contorta and P. ponderosa soil cores. Rhizopogon spp. were ubiquitous in P. ponderosa cores. There was no significant difference in the species composition of EMF communities of P. ponderosa and P. contorta. Ordination analysis of P. ponderosa soils suggested that soil pH, plant-available phosphorus (Bray), total phosphorus (P), carbon (C), mineralizable nitrogen (N), ammonium (NH4), and nitrate (NO3) are driving EMF community composition in P. ponderosa stands. We found a significant linear relationship between EMF species richness and mineralizable N. In conclusion, P. ponderosa and P. contorta, within the Deschutes National Forest, share the same dominant EMF species, which implies that P. ponderosa may be able to successfully establish within the historic P. contorta range and dominant EMF assemblages may be conserved.
- Visit PNW's Publication Request Page to request a hard copy of this publication.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationGarcia, Maria O.; Smith, Jane E.; Luoma, Daniel L.; Jones, Melanie D. 2016. Ectomycorrhizal communities of ponderosa pine and lodgepole pine in the south-central Oregon pumice zone. Mycorrhiza. 26(4): 275-286.
KeywordsClimate change, Ectomycorrhizal communities, Pine species migration, Pinus contorta, Pinus ponderosa
- Should ponderosa pine be planted on lodgepole pine sites?
- A ponderosa pine-lodgepole pine spacing study in central Oregon: results after 20 years.
- Analysis of three microscopic characters for separating the wood of Pinus contorta and P. ponderosa
XML: View XML