Repository logo
 

Soil bacterial community composition altered by increased nutrient availability in Arctic tundra soils

Simple item page
dc.contributor.authorKoyama, Akihiro, author
dc.contributor.authorWallenstein, Matthew D., author
dc.contributor.authorSimpson, Rodney T., author
dc.contributor.authorMoore, John C., author
dc.contributor.authorFrontiers Research Foundation, publisher
dc.coverage.spatialArctic regions
dc.date.accessioned2007-01-03T07:09:09Z
dc.date.available2007-01-03T07:09:09Z
dc.date.issued2014-10-02
dc.description.abstractThe pool of soil organic carbon (SOC) in the Arctic is disproportionally large compared to those in other biomes. This large quantity of SOC accumulated over millennia due to slow rates of decomposition relative to net primary productivity. Decomposition is constrained by low temperatures and nutrient concentrations, which limit soil microbial activity. We investigated how nutrients limit bacterial and fungal biomass and community composition in organic and mineral soils within moist acidic tussock tundra ecosystems. We sampled two experimental arrays of moist acidic tussock tundra that included fertilized and non-fertilized control plots. One array included plots that had been fertilized annually since 1989 and the other since 2006. Fertilization significantly altered overall bacterial community composition and reduced evenness, to a greater degree in organic than mineral soils, and in the 1989 compared to the 2006 site. The relative abundance of copiotrophic α-Proteobacteria and β-Proteobacteria was higher in fertilized than control soils, and oligotrophic Acidobacteria were less abundant in fertilized than control soils at the 1989 site. Fungal community composition was less sensitive to increased nutrient availability, and fungal responses to fertilization were not consistent between soil horizons and sites. We detected two ectomycorrhizal genera, Russula and Cortinarius spp., associated with shrubs. Their relative abundance was not affected by fertilization despite increased dominance of their host plants in the fertilized plots. Our results indicate that fertilization, which has been commonly used to simulate warming in Arctic tundra, has limited applicability for investigating fungal dynamics under warming.
dc.description.sponsorshipPublished with support from the Colorado State University Libraries Open Access Research and Scholarship Fund.
dc.format.mediumborn digital
dc.format.mediumarticles
dc.identifier.bibliographicCitationKoyama, Akihiro, Matthew D. Wallenstein, Rodney T. Simpson and John C. Moore, Soil Bacterial Community Composition Altered by Increased Nutrient Availability in Arctic Tundra Soils. Frontiers in Microbiology 5, article 516 (October 2014): 1-16. http://dx.doi.org/10.3389/fmicb.2014.00516
dc.identifier.doihttps://dx.doi.org/10.3389/fmicb.2014.00516
dc.identifier.urihttp://hdl.handle.net/10217/85624
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartofOpen Access Research and Scholarship Fund (OARS)
dc.rights.licenseThis article is open access and distributed under the terms and conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0).
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectphosphorus
dc.subjectnitrogen
dc.subjectsoil
dc.subjectbacteria
dc.subjectfungi
dc.subjectfertilization
dc.subjectArctic tundra
dc.subjectmycorrhizae
dc.titleSoil bacterial community composition altered by increased nutrient availability in Arctic tundra soils
dc.typeText

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Koyama_FiM_2014_OARS.pdf
Size:
2.38 MB
Format:
Adobe Portable Document Format
Description:
Download

Collections

Open Access Research and Scholarship Fund (OARS)
Faculty Publications
Faculty Publications
Faculty Publications