Colder soils in a warmer world: A snow manipulation study in a northern hardwood forest ecosystem
作者： Peter M. Groffman , Charles T. Driscoll , Timothy J. Fahey , Janet P. Hardy , Ross D. Fitzhugh
关键词: Environmental science 、 Snow 、 Biogeochemistry 、 Soil water 、 Leaching (agriculture) 、 Hydrology 、 Ecosystem 、 Biomass (ecology) 、 Nitrogen cycle 、 Forest ecology
摘要: In this special section of Biogeochemistry, we present results from asnow manipulation experiment in the northernhardwood forest ecosystem at Hubbard BrookExperimental Forest White Mountains ofNew Hampshire, U.S.A. Snow is important as aninsulator soils. Later developmentof snowpacks, may occur a warmer climate,may result increases soil freezing (i.e.colder soils world) and could causechanges fine root microbial mortality,hydrologic gaseous losses nitrogen (N),and acid-base status drainage water. Inour study, kept snow free by shovelinguntil early February during mild winters of1997/1998 1998/1999. The treatment producedmild, but persistent inducedsurprisingly significant effects on rootmortality, nitrate (NO3 −) levelsand hydrologic fluxes C, N P. thisspecial four papersaddressing, (1) temperature moistureresponse to our treatment(Hardy et al.), (2) theresponse dynamics treatment(Tierney (3) inorganic levels, insitu mineralization nitrification,denitrification biomass thetreatment (Groffman al.)and (4) solution concentrations fluxesof P (Fitzhugh al.). introductory paper we: (1)review literature forestbiogeochemistry, introduce manipulationexperiment summarize resultspresented other papers issue.
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