Title: Nitrogen deposition and cycling across an elevation and vegetation gradient in southern Appalachian forests
Author: Knoepp, Jennifer D.; Vose, James M.; Swank, Wayne T.
Source: International Journal of Environmental Studies, Vol. 65(3): 389-408
Publication Series: Not categorized
Description: We studied nitrogen (N) cycling pools and processes across vegetation and elevation gradients in. the southern Appalachian Mountains in SE USA. Measurements included bulk deposition input, watershed export, throughfall fluxes, litterfall, soil N pools and processes, and soil solution N. N deposition increased with elevation and ranged from 9.5 to 12.4 kg ha-1 yr-1. In all sites canopies retained inorganic N and lost organic N; net canopy retention varied among vegetation types. The high elevation site had the greatest litterfall N, soil N transformations, soil solution N, and greater stream N exports (0.60 kg ha-1 p-1). Low elevation sites had lower litterfall N, soil N transformations, and soil solution N. Low stream N exports (0.14 kg ha-1 p-1) suggested N limitation. Multivariate analyses showed that abiotic variables account for up to 63% of the variation in biotic site characteristics.
Keywords: elevation gradient, N cycling, N deposition, Coweeta Hydrological Laboratory, soil nitrogen, litterfall
- 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.
XML: View XML
Knoepp, Jennifer D.; Vose, James M.; Swank, Wayne T. 2008. Nitrogen deposition and cycling across an elevation and vegetation gradient in southern Appalachian forests. International Journal of Environmental Studies, Vol. 65(3): 389-408
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility