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Mapping Stable Nitrogen Isotopes Using Hyperspectral Imagery

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dc.contributorVirginia Tech GIS & Remote Sensing 2014 Research Symposiumen
dc.contributor.authorCorrell, Katieen
dc.contributor.authorStrahm, Brian D.en
dc.contributor.authorThomas, Valerie A.en
dc.contributor.departmentCenter for Environmental Applications of Remote Sensing (CEARS)en
dc.contributor.departmentVirginia Tech GIS and Remote Sensing Research Symposiumen
dc.coverage.countryUnited Statesen
dc.coverage.stateNorth Carolinaen
dc.date.accessioned2014-11-04T19:39:22Zen
dc.date.available2014-11-04T19:39:22Zen
dc.date.issued2014en
dc.description.abstractAs nitrogen deposition increases globally, ecosystem changes will occur. It is important to understand the growth response of different ecosystems and where nitrogen retention will occur. Stable isotopes of foliar nitrogen can provide insight into how this process is occurring in the soil. Previous studies have found links between foliar nitrogen and optical properties.This study focuses on the Southern Piedmont Forests. A study at the Duke Forest's Blackwood Division in Chapel Hill, North Carolina, allowed for foliar sampling across various soil types, elevations, and species. Concurrent hyperspectral imagery was taken, allowing for the relationship between environmental drivers, optical properties, and nitrogen content to be identified. These relationships will be used to map nitrogen content at the canopy level. Foliar sampling was performed in species identified as major contributors to the canopy. Major canopy contributors were oak, hickory, poplar, sweetgum, and pine. Foliar samples were analyzed for chlorophyll, macronutrients, carbon, nitrogen, and stable isotope N15. The relationship of these characteristics, as well as elevation, soil type, species, and optical properties, were input to predict the spectral signature associated with the N15 content.Ancillary data on elevation, soil type, and species, coupled with hyperspectral imagery, will use the relationships to predict canopy level nitrogen at the image scale.en
dc.description.sponsorshipVirginia Tech. Office of Geographical Information Systems and Remote Sensingen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/10919/50683en
dc.language.isoenen
dc.rightsIn Copyrighten
dc.rights.holderCorrell, Katieen
dc.rights.holderStrahm, Brianen
dc.rights.holderThomas, Valerie A.en
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectNitrogen--isotopesen
dc.subjectPiedmont (U.S.: region)en
dc.subjectForest canopiesen
dc.subjectEnvironmental mappingen
dc.titleMapping Stable Nitrogen Isotopes Using Hyperspectral Imageryen
dc.typePosteren
dc.type.dcmitypeTexten
dc.type.dcmitypeImageen

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