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Importance of Foliar Nitrogen Concentration to Predict Forest Productivity in the Mid-Atlantic RegionAuthor(s): Yude Pan; John Hom; Jennifer Jenkins; Richard Birdsey
Source: Forest Science. 50(3): 279-289.
Publication Series: Scientific Journal (JRNL)
Station: Northeastern Research Station
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DescriptionTo assess what difference it might make to include spatially defined estimates of foliar nitrogen in the regional application of a forest ecosystem model (PnET-II), we composed model predictions of wood production from extensive ground-based forest inventory analysis data across the Mid-Atlantic region. Spatial variation in foliar N concentration was assigned based on a correlation with mean July temperature for deciduous forests and with latitude for coniferous forests. Although the slight variation observed in foliar N in conifers had little effect on predicted wood production, large differences in N concentration in deciduous trees increased agreement with field surveys by 12-59% in individual states and by 17% across the region. The validation revealed the need to develop regional foliar N concentration equations that represent the spatial variations of N concentration in deciduous forests to improve PnET-II's predictions.
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CitationPan, Yude; Hom, John; Jenkins, Jennifer; Birdsey, Richard. 2004. Importance of Foliar Nitrogen Concentration to Predict Forest Productivity in the Mid-Atlantic Region. Forest Science. 50(3): 279-289.
KeywordsWood production, forest inventory and analysis data (FIA), validation, ecosystem model, PnET-II
- Net primary production and canopy nitrogen in a temperate forest landscape: an analysis using imaging spectroscopy, modeling and field data
- Regional estimation of current and future forest biomass
- Direct estimation of aboveground forest productivity through hyperspectral remote sensing of canopy nitrogen
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