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Seasonal Differences in Nutrient Allocation of Arctic Tundra Vegetation
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 Material Information
Title: Seasonal Differences in Nutrient Allocation of Arctic Tundra Vegetation
Series Title: Journal of Undergraduate Research
Physical Description: Serial
Language: English
Creator: Mason, Chase M.
Pries, Caitlin E. Hicks
Schuur, Edward A. G.
Publisher: University of Florida
Place of Publication: Gainesville, Fla.
Publication Date: 2010
Abstract: Arctic tundra ecosystems are under increasing pressure from rising temperatures and nutrient deposition. As nutrient cycling is altered in the face of such pressures, it is important to understand ecosystem functioning in minimally impacted tundra. This study investigates differences in nitrogen allocation among plant functional groups and species. It also investigates the sources and pathways of nitrogen uptake among functional groups. Distinct patterns in nitrogen allocation were observed between evergreen and deciduous life history strategies. Deciduous species such as graminoids and Vaccinium uliginosum were found to invest heavily in storage organs and to allocate nitrogen to foliage in a fleeting pulse. Evergreen species such as Rhododendron subarcticum and Vaccinium vitis-idaea were found to invest a much higher amount of nitrogen in persistent leaf biomass, with a lower proportion of nitrogen allocated to storage. Available nitrogen was found to be partitioned between functional groups by source, with graminoids favoring ammonium and woody species favoring nitrate. The description of tundra nitrogen dynamics afforded by this study provide a baseline for further study into the impacts of change on nutrient cycling in this threatened ecosystem.
 Record Information
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
System ID: UF00091523:00584

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