Distribution of nitrogen-15 tracers applied to the canopy of a mature spruce-hemlock stand, Howland, Maine, USA

David Bryan Dail; David Hollinger; Eric A. Davidson; Ivan Fernandez; Herman C. Sievering; Neal A. Scott; Elizabeth Gaige

Treesearch

Distribution of nitrogen-15 tracers applied to the canopy of a mature spruce-hemlock stand, Howland, Maine, USA

Informally Refereed

Authors:

David Bryan Dail, David Hollinger, Eric A. Davidson, Ivan Fernandez, Herman C. Sievering, Neal A. Scott, Elizabeth Gaige

Year:

2009

Type:

Scientific Journal

Station:

Northern Research Station

Source:

Oecologia. 160: 589-599.

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Abstract

In N-limited ecosystems, fertilization by N deposition may enhance plant growth and thus impact C sequestration. In many N deposition-C sequestration experiments, N is added directly to the soil, bypassing canopy processes and potentially favoring N immobilization by the soil. To understand the impact of enhanced N deposition on a low fertility unmanaged forest and better emulate natural N deposition processes, we added 18 kg N ha^-1 year^-1 as dissolved NH₄NO₃ directly to the canopy of 21 ha of spruce-hemlock forest.

Keywords

nitrogen-15, nitrate, ammonium, nitrogen deposition, carbon sequestration, Forest elemental cycling

Citation

Dail, David Bryan; Hollinger, David Y.; Davidson, Eric A.; Fernandez, Ivan; Sievering, Herman C.; Scott, Neal A.; Gaige, Elizabeth. 2009. Distribution of nitrogen-15 tracers applied to the canopy of a mature spruce-hemlock stand, Howland, Maine, USA. Oecologia. 160: 589-599.