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    Author(s): William E. Holmes; Donald R. Zak; Kurt S. Pregitzer; John S. King
    Date: 2003
    Source: Global Change Biology. 9: 1743-1750.
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: View PDF  (323.56 KB)

    Description

    Increases in atmospheric CO2 and tropospheric O3 may affect forest N cycling by altering plant litter production and the availability of substrates for microbial metabolism. Three years following the establishment of our free-air CO2-O3 enrichment experiment, plant growth has been stimulated by elevated CO2 resulting in greater substrate input to soil; elevated O3 has counteracted this effect. We hypothesized that rates of soil N cycling would be enhanced by greater plant productivity under elevated CO2, and that CO2 effects would be dampened by O3.

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    Citation

    Holmes, William E.; Zak, Donald R.; Pregitzer, Kurt S.; King, John S. 2003. Soil nitrogen transformations under Populus tremuloides, Betula papyrifera and Acer saccharum following 3 years exposure to elevated CO2 and O3

    Keywords

    Acer, Betula, CO2, immobilization, mineralization, 15N, N cycling, O3, Populus

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