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(Article of periodic en Anglais - 2012)

Document title

Soil nitrogen transformations associated with small patterned-ground features along a North American Arctic transect

Authors(s) and Affiliation(s)

KELLEY A.M. (1) ; EPSTEIN H.E. (1) ; PING C.-L. (2) ; WALKER D.A. (3) ;
(1) Dept. of Environmental Sciences, University of Virginia, Charlottesville, ETATS-UNIS
(2) Palmer Research Center, Univ. of Alaska Fairbanks, Palmer, ETATS-UNIS
(3) Inst. of Arctic Biology, Univ. of Alaska Fairbanks, Fairbanks, ETATS-UNIS

Abstract

Small patterned-ground features (PGFs) in the Arctic have unique soil properties that vary with latitude and may greatly affect tundra biogeochemistry. Because nitrogen availability can strongly limit arctic vegetation growth, the AA. examined how soil nitrogen transformations differ between PGFs and the surrounding inter-PGF tundra along an arctic latitudinal gradient. The 8 study sites are located from the Alaskan Low Arctic to the Canadian High Arctic. The soils were incubated for 21 days at 9°c and 15°c and analysed for changes in total inorganic nitrogen, nitrate and extractable organic nitrogen (EON). The results show that spatial heterogeneity at several scales can influence soil nitrogen dynamics, and is therefore an important influence on arctic ecosystem function

Source

Article of periodic

published at : Permafrost and periglacial processes / ISSN 1045-6740 / CODEN PEPPED

Editor : Wiley, Chichester - ROYAUME-UNI (1990)

Millesime : 2012, vol. 23, no3 [pp. 196-206]

Bibliographic references : 2 p.

Collation : 3 fig., 2 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.1748

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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