20130710

Author : Thomas, R. Q. Canham, C. D. Weathers, K. C. Goodale, C. L.
Year :  2010
Title : Increased tree carbon storage in response to nitrogen deposition in the US
Journal : Nature Geoscience
Comment :  Plot-level 15N tracer experiments show that most added N is retained in soil rather than trees, leading to estimates of a small N-induced forest C sink (0:14 Pg C yr-1 in trees; 0:25 Pg C yr-1 in trees C soil). The net effect of N deposition on tree C stocks depends on not only the growth responses but also the mortality response. Long-term fertilization studies show that N additions can provide modest growth enhancements but that N saturation can induce mortality, which decreases C storage in live biomass casting.

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