You are here: Home
/ Publication Information
Title: Soil freezing effects on sources of nitrogen and carbon leached during snowmelt
Author: Campbell, John L.; Reinmann, Andrew B.; Templer, Pamela H.;
Source: Soil Science Society of America Journal. 78(1): 297-308.
Publication Series: Scientific Journal (JRNL)
Description: Soil freezing in winter has been shown to enhance growing season losses of C and N in northern forests. However, less is known about effects of soil freezing on C and N retention during snowmelt and the sources of C and N leached, which is important because losses to stream water are greatest during this period. Organic horizon soils (Oi + Oe + Oa) from the Hubbard Brook Experimental Forest in New Hampshire, United States were placed in columns in a laboratory experiment and subjected to one of three different temperature treatments (+5.0, −0.5, and −15.0°C) before they were covered with snow and placed in a +5.0¯C cold room to induce snowmelt. Results for all temperature treatments showed that fluxes of all forms of C and N declined over snowmelt, indicating flushing of a limited soil pool. The quality of dissolved organic matter (DOM) became increasingly aromatic, while δ15N-NO3- declined, indicating that as labile organic matter and N become less available during snowmelt, a greater proportion of N is cycled through the microbial pool. Mild soil freezing had little effect on C and N processing; however, severe soil freezing resulted in delayed leaching and a flush of labile DOM. The severely frozen soils also leached significantly less dissolved inorganic N (DIN; NH4+ and NO3-), likely due to the inhibitory effect of extremely cold soil temperatures on microbial production. These results highlight the importance of winter climate in regulating fluxes and sources of C and N leached during snowmelt, having implications for stream water quality.
- 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, firstname.lastname@example.org if you notice any errors which make this publication unusable.
XML: View XML
Campbell, John L.; Reinmann, Andrew B.; Templer, Pamela H. 2014. Soil freezing effects on sources of nitrogen and carbon leached during snowmelt. Soil Science Society of America Journal. 78(1): 297-308.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility