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Searching for biogeochemical hot spots in three dimensions: Soil C and N cycling in hydropedologic settings in a northern hardwood forest

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dc.contributor.authorMorse, J. L.en
dc.contributor.authorWerner, S. F.en
dc.contributor.authorGillin, C. P.en
dc.contributor.authorGoodale, Christine L.en
dc.contributor.authorBailey, Scott W.en
dc.contributor.authorMcGuire, Kevin J.en
dc.contributor.authorGroffman, Peter M.en
dc.contributor.departmentForest Resources and Environmental Conservationen
dc.contributor.departmentVirginia Water Resources Research Centeren
dc.date.accessioned2017-01-12T01:25:34Zen
dc.date.available2017-01-12T01:25:34Zen
dc.date.issued2014-08-01en
dc.description.abstractUnderstanding and predicting the extent, location, and function of biogeochemical hot spots at the watershed scale is a frontier in environmental science. We applied a hydropedologic approach to identify (1) biogeochemical differences among morphologically distinct hydropedologic settings and (2) hot spots of microbial carbon (C) and nitrogen (N) cycling activity in a northern hardwood forest in Hubbard Brook Experimental Forest, New Hampshire, USA. We assessed variables related to C and N cycling in spodic hydropedologic settings (typical podzols, bimodal podzols, and Bh podzols) and groundwater seeps during August 2010. We found that soil horizons (Oi/Oe, Oa/A, and B) differed significantly for most variables. B horizons (>10cm) accounted for 71% (±11%) of C pools and 62%(±10%) ofmicrobial biomass C in the sampled soil profile, whereas the surface horizons (Oi/Oe and Oa/A; 0–10cm) were dominant zones for N-cycle-related variables. Watershed-wide estimates of C and N cycling were higher by 34 to 43% (±17–19%) when rates, horizon thickness, and areal extent of each hydropedologic setting were incorporated, versus conventionally calculated estimates for typical podzols that included only the top 10cm of mineral soil. Despite the variation in profile development in typical, bimodal, and Bh podzols, we did not detect significant differences in C and N cycling among them. Across all soil horizons and hydropedologic settings, we found strong links between biogeochemical cycling and soil C, suggesting that the accumulation of C in soils may be a robust indicator of microbial C and N cycling capacity in the landscape.en
dc.description.versionPublished versionen
dc.format.extent1596 - 1607 (12) page(s)en
dc.identifier.doihttps://doi.org/10.1002/2013JG002589en
dc.identifier.issn2169-8953en
dc.identifier.issue8en
dc.identifier.orcidMcGuire, Kevin J. [0000-0001-5751-3956]en
dc.identifier.urihttp://hdl.handle.net/10919/74259en
dc.identifier.volume119en
dc.languageEnglishen
dc.publisherAmerican Geophysical Unionen
dc.relation.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000342993200008&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=930d57c9ac61a043676db62af60056c1en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectEnvironmental Sciencesen
dc.subjectGeosciences, Multidisciplinaryen
dc.subjectEnvironmental Sciences & Ecologyen
dc.subjectGeologyen
dc.subjectN mineralizationen
dc.subjectnitrificationen
dc.subjectdenitrificationen
dc.subjectmicrobial respirationen
dc.subjectsoil profileen
dc.subjectRIPARIAN ZONESen
dc.subjectSHALLOW GROUNDWATERen
dc.subjectLANDSCAPE POSITIONen
dc.subjectORGANIC-CARBONen
dc.subjectNITROGENen
dc.subjectDENITRIFICATIONen
dc.subjectECOSYSTEMen
dc.subjectTERRESTRIALen
dc.subjectCATCHMENTen
dc.subjectHYDROLOGYen
dc.titleSearching for biogeochemical hot spots in three dimensions: Soil C and N cycling in hydropedologic settings in a northern hardwood foresten
dc.title.serialJournal of Geophysical Research-Biogeosciencesen
dc.typeArticle - Refereeden
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Engineeringen
pubs.organisational-group/Virginia Tech/Engineering/COE T&R Facultyen
pubs.organisational-group/Virginia Tech/Engineering/Electrical and Computer Engineeringen
pubs.organisational-group/Virginia Tech/Natural Resources & Environmenten
pubs.organisational-group/Virginia Tech/Natural Resources & Environment/CNRE T&R Facultyen
pubs.organisational-group/Virginia Tech/Natural Resources & Environment/Water Resources Research Centeren

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