Show simple item record

dc.contributor.authorSullivan, Patrick F.
dc.contributor.authorSommerkorn, Martin
dc.contributor.authorRueth, Heather M.
dc.contributor.authorNadelhoffer, Knute J.
dc.contributor.authorShaver, Gaius R.
dc.contributor.authorWelker, Jeffrey M.
dc.date.accessioned2007-10-08T13:04:08Z
dc.date.available2007-10-08T13:04:08Z
dc.date.issued2007-04-12
dc.identifier.urihttp://hdl.handle.net/1912/1812
dc.descriptionAuthor Posting. © The Author(s), 2007. This is the author's version of the work. It is posted here by permission of Springer for personal use, not for redistribution. The definitive version was published in Oecologia 153 (2007): 643-652, doi:10.1007/s00442-007-0753-8.en
dc.description.abstractLong-term fertilization of acidic tussock tundra has led to changes in plant species composition, increases in aboveground production and biomass and substantial losses of soil organic carbon (SOC). Root litter is an important input to SOC pools, though little is known about fine root demography in tussock tundra. In this study, we examined the response of fine root production and live standing fine root biomass to short- and long-term fertilization, as changes in fine root demography may contribute to observed declines in SOC. Live standing fine root biomass increased with long-term fertilization, while fine root production declined, reflecting replacement of the annual fine root system of Eriophorum vaginatum, with the long-lived fine roots of Betula nana. Fine root production increased in fertilized plots during an unusually warm growing season, but remained unchanged in control plots, consistent with observations that B. nana shows a positive response to climate warming. Calculations based on a few simple assumptions suggest changes in fine root demography with long-term fertilization and species replacement could account for between 20 and 39% of observed declines in SOC stocks.en
dc.description.sponsorshipThis project was supported by National Science Foundation research grants 9810222, 9911681, 0221606 and 0528748.en
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen
dc.relation.urihttps://doi.org/10.1007/s00442-007-0753-8
dc.subjectBetula nanaen
dc.subjectEriophorum vaginatumen
dc.subjectFertilizationen
dc.subjectFine rootsen
dc.subjectIngrowth coresen
dc.subjectMinirhizotronsen
dc.subjectSoil organic carbonen
dc.subjectTussock tundraen
dc.titleClimate and species affect fine root production with long-term fertilization in acidic tussock tundra near Toolik Lake, Alaskaen
dc.typePreprinten


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record