Skip to Main Content
Tree growth, foliar chemistry, and nitrogen cycling across a nitrogen deposition gradient in southern Appalachian deciduous forestsAuthor(s): Johnny L. Boggs; Steven G. McNulty; Michael J. Gavazzi; Jennifer Moore Myers
Source: Canadian Journal Forest Resource. 35: 1901-1913.
Publication Series: Miscellaneous Publication
PDF: View PDF (1.63 MB)
DescriptionThe declining health of high-elevation red spruce (Picea rubens Sarg.) and Fraser fir (Abies fraseri (Pursh) Poir.) in the southern Appalachian region has long been linked to nitrogen (N)deposition. Recently, N deposition has also been proposed as a source of negative health impacts in lower elevation deciduous forests. In 1998 we established 46 plots on six sites in North Carolina and Virginia dominated by American beecn (Fagus grandifolia Ehrh.), sugar maple (Acer saccharum Marsh.), and yellow birh (Betula alleghaniensis Britt). We evaluated several response variables across an N deposition gradient, including annual basal area growth; foliage percent N, AI, P, K, Mg, and Ca; and forest floor percent N, Mg, and C, pH, and potential net nitrification and N mineralization rates. we found a significant linear relationship between N deposition and basal area growth in sugar maple, but no in American beech or ellow birch. In addition, we found a significant relationship between N deposition adn foliar chemisty (foliar %N in all species, foliar Mg/N and %K in sugar maple, and %P in sugar maple and yellow birch). Foliar %N of the three studied species was high relative to values reported in other studies in the United States and Canada. Several forest floor response variables (%N, C/N, pH, Mg/N, and potential net nitrification and N mineralization rates and nitrification/mineralization fractions)were also correlated with N deposition. The correlations between the above response variables and N deposition are consisten with the influence of chronic N deposition on forested ecosystems measured in other regions and suggest that chronic N deposition may be influencing forest structure and chemistry within the southern region.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- 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.
CitationBoggs, Johnny L.; McNulty, Steven G.; Gavazzi, Michael J.; Myers, Jennifer Moore. 2005. Tree growth, foliar chemistry, and nitrogen cycling across a nitrogen deposition gradient in southern Appalachian deciduous forests. Canadian Journal Forest Resource. 35: 1901-1913.
- Comparative growth trends of five northern hardwood and montane tree species reveal divergent trajectories and response to climate
- Tree seedling growth and mortality responses to manipulations of calcium and aluminum in a northern hardwood forest
- Migration of tree species in New England based on elevational and regional analyses
XML: View XML