Increased nitrogen leaching following soil freezing is due to decreased root uptake in a northern hardwood forest

TitleIncreased nitrogen leaching following soil freezing is due to decreased root uptake in a northern hardwood forest
Publication TypeJournal Article
Year of Publication2014
AuthorsCampbell, JL, Socci, AM, Templer, PH
JournalGlobal Change Biology
Volume20
Issue8
Pagination2663 - 2673
Date Published2014///
ISBN Number1365-2486
KeywordsClimate Change, root uptake, snow, Soil frost, soil solution, Stable isotopes
Abstract

The depth and duration of snow pack is declining in the northeastern United States as a result of warming air temperatures. Since snow insulates soil, a decreased snow pack can increase the frequency of soil freezing, which has been shown to have important biogeochemical implications. One of the most notable effects of soil freezing is increased inorganic nitrogen losses from soil during the following growing season. Decreased nitrogen retention is thought to be due to reduced root uptake, but has not yet been measured directly. We conducted a 2-year snow-removal experiment at Hubbard Brook Experimental Forest in New Hampshire, USA to determine the effects of soil freezing on root uptake and leaching of inorganic nitrogen simultaneously. Snow removal significantly increased the depth of maximal soil frost by 37.2 and 39.5 cm in the first and second winters, respectively (P 

URLhttp://onlinelibrary.wiley.com/doi/10.1111/gcb.12532/abstract
Short TitleGlob Change Biol