Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (1.0 MB)

Title: Spatial patterns of soil nitrification and nitrate export from forested headwaters in the northeastern United States

Author: Ross, Donald S.; Shanley, James B.; Campbell, John L.; Lawrence, Gregory B.; Bailey, Scott W.; Likens, Gene E.; Wemple, Beverley C.; Creed, I.F.; Courchesne, F.;

Date: 2012

Source: Journal of Geophysical Research. 117(G1)

Publication Series: Scientific Journal (JRNL)

Description: Nitrogen export from small forested watersheds is known to be affected by N deposition but with high regional variability. We studied 10 headwater catchments in the northeastern United States across a gradient of N deposition (5.4 − 9.4 kg ha−1 yr−1) to determine if soil nitrification rates could explain differences in stream water NO3 export. Average annual export of two years (October 2002 through September 2004) varied from 0.1 kg NO3-N ha−1 yr−1 at Cone Pond watershed in New Hampshire to 5.1 kg ha−1 yr−1 at Buck Creek South in the western Adirondack Mountains of New York. Potential net nitrification rates and relative nitrification (fraction of inorganic N as NO3) were measured in Oa or A soil horizons at 21–130 sampling points throughout each watershed. Stream NO3 export was positively related to nitrification rates (r2 = 0.34, p = 0.04) and the relative nitrification (r2 = 0.37, p = 0.04). These relationships were much improved by restricting consideration to the 6 watersheds with a higher number of rate measurements (59–130) taken in transects parallel to the streams (r2 of 0.84 and 0.70 for the nitrification rate and relative nitrification, respectively). Potential nitrification rates were also a better predictor of NO3 export when data were limited to either the 6 sampling points closest to the watershed outlet (r2 = 0.75) or sampling points <250 m from the watershed outlet (r2 = 0.68). The basal area of conifer species at the sampling plots was negatively related to NO3export. These spatial relationships found here suggest a strong influence of near-stream and near-watershed-outlet soils on measured stream NO3 export.

Keywords: Ecosystems, structure and dynamics, Nitrogen cycling, Soils/pedology, Water quality

Publication Notes:

  • 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.
  • This publication may be available in hard copy. Check the Northern Research Station web site to request a printed copy of this publication.
  • Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact Sharon Hobrla, shobrla@fs.fed.us if you notice any errors which make this publication unusable.

XML: View XML

Citation:


Ross, Donald S.; Shanley, James B.; Campbell, John L.; Lawrence, Gregory B.; Bailey, Scott W.; Likens, Gene E.; Wemple, Beverley C.; Fredriksen, Guinevere; Jamison, Austin E. 2012. Spatial patterns of soil nitrification and nitrate export from forested headwaters in the northeastern United States. Journal of Geophysical Research. 117(G1)

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.