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    Author(s): K.F. Crowley; B.E. McNeil; G.M. Lovett; C.D. Canham; C.T. Driscoll; L.E. Rustad; E. Denny; R.A. Hallett; M.A. Arthur; J.L. Boggs; C.L. Goodale; J.S. Kahl; S.G. McNulty; S.V. Ollinger; L.H. PardoP.G. Schaberg; J.L. Stoddard; M.P. Weand; K.C. Weather
    Date: 2012
    Source: Ecosystems. 15: 940-957.
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: Download Publication  (569.97 KB)


    Atmospheric nitrogen (N) deposition is altering biogeochemical cycling in forests and interconnected lakes of the northeastern US, and may shift nutrient limitation from N toward other essential elements, such as phosphorus (P). Whether this shift is occurring relative to N deposition gradients across the northeastern US has not been investigated. We used datasets for the northeastern US and the Adirondack sub-region to evaluate whether P limitation is increasing where N deposition is high at two geographic scales, based on N:P mass ratios. Using a model-selection approach, we determined that foliar N for dominant tree species and lake dissolved inorganic N (DIN) increased coincident with increasing N deposition, independent of relationships between foliar N or lake DIN and precipitation or temperature. Foliar P also increased with N deposition across the northeastern US for seven of eight deciduous species, but changed less across the Adirondacks.

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    Crowley, K.F.; McNeil, B.E.; Lovett, G.M.; Canham, C.D.; Driscoll, C.T.; Rustad, L.E.; Denny, E.; Hallett, R.A.; Arthur, M.A.; Boggs, J.L.; Goodale, C.L.; Kahl, J.S.; McNulty, S.G.; Ollinger, S.V.; Pardo, L.H.; Schaberg, P.G.; Stoddard, J.L.; Weand, M.P.; Weather, K.C. 2012. Do nutrient limitation patterns shift from nitrogen toward phosphorus with increasing nitrogen deposition across the northeastern United States. Ecosystems. 15: 940-957.


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    nutrient limitation, nitrogen deposition, phosphorus, northeastern US, forest, lake, Adirondacks

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