Hillslope Nutrient Dynamics Following Upland Riparian Vegetation Disturbance

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dc.contributor.advisorUMBC Faculty Collection
dc.contributor.authorYeakley, J. Alan
dc.contributor.authorColeman, David C.
dc.contributor.authorHaines, Bruce L.
dc.contributor.authorKloeppel, Brian D.
dc.contributor.authorMeyer, Judy L.
dc.contributor.authorSwank, Wayne T.
dc.contributor.authorArgo, Barry W.
dc.contributor.authorDeal, James M.
dc.contributor.authorTaylor, Sharon F.
dc.date.accessioned2018-03-13T15:48:31Z
dc.date.available2018-03-13T15:48:31Z
dc.date.issued2003
dc.descriptionPer Portland State University, one or more authors of this paper were federal employees when contributing to this work and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law. See https://works.bepress.com/j_yeakley/6/.en_US
dc.description.abstractWe investigated the effects of removing near-stream Rhododendron and of the natural blowdown of canopy trees on nutrient export to streams in the southern Appalachians. Transects were instrumented on adjacent hillslopes in a first-order watershed at the Coweeta Hydrologic Laboratory (35°03′N, 83°25′W). Dissolved organic carbon (DOC), K⁺, Na⁺, Ca²⁺, Mg²⁺, NO₃⁻-N, NH₄⁺-N, PO₄³−-P, and SO₄²− were measured for 2 years prior to disturbance. In August 1995, riparian Rhododendron on one hillslope was cut, removing 30% of total woody biomass. In October 1995, Hurricane Opal uprooted nine canopy trees on the other hillslope, downing 81% of the total woody biomass. Over the 3 years following the disturbance, soilwater concentrations of NO₃⁻-N tripled on the cut hillslope. There were also small changes in soilwater DOC, SO₄²⁻, Ca²⁺, and Mg²⁺. However, no significant changes occurred in groundwater nutrient concentrations following Rhododendron removal. In contrast, soilwater NO₃⁻-N on the storm-affected hillslope showed persistent 500-fold increases, groundwater NO₃−-N increased four fold, and streamwater NO₃−-N doubled. Significant changes also occurred in soilwater pH, DOC, SO₄²⁻, Ca²⁺, and Mg²⁺. There were no significant changes in microbial immobilization of soil nutrients or water outflow on the storm-affected hillslope. Our results suggest that Rhododendron thickets play a relatively minor role in controlling nutrient export to headwater streams. They further suggest that nutrient uptake by canopy trees is a key control on NO3−-N export in upland riparian zones, and that disruption of the root–soil connection in canopy trees via uprooting promotes significant nutrient loss to streams.en_US
dc.description.sponsorshipThis work was supported by the Coweeta LTER (Long Term Ecological Research) Program (National Science Foundation [NSF] grants BSR 90 11661 and DEB 96 32854) and partially funded by the USDA, Forest Service, Southern Research Station.en_US
dc.description.urihttps://link.springer.com/article/10.1007%2Fs10021-002-0116-6en_US
dc.format.extent16 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/M2FB4WN98
dc.identifier.citationYeakley, J., Coleman, D. C., Haines, B. L., Kloeppel, B. D., Meyer, J. L., Swank, W. T., & ... Taylor, S. F. (2003). Hillslope Nutrient Dynamics Following Upland Riparian Vegetation Disturbance. Ecosystems, 6(2), 0154-0167.en_US
dc.identifier.urihttp://hdl.handle.net/11603/7859
dc.language.isoen_USen_US
dc.publisherSpringeren_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Geography and Environmental Systems Department Collection
dc.rightsThis item may be protected under Title 17 of the U.S. Copyright Law. It is made available by UMBC for non-commercial research and education. For permission to publish or reproduce, please contact the author.
dc.subjectbiogeochemistryen_US
dc.subjectdissolved organic carbonen_US
dc.subjecthillslope hydrologyen_US
dc.subjectnutrient uptakeen_US
dc.subjectsoilwater chemistryen_US
dc.subjectsouthern Appalachian mountainsen_US
dc.subjectstreamwater qualityen_US
dc.subjectvegetation removalen_US
dc.subjectwatershed managementen_US
dc.subjectwindthrowen_US
dc.titleHillslope Nutrient Dynamics Following Upland Riparian Vegetation Disturbanceen_US
dc.typeTexten_US

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