Nitrogen deposition and carbon sequestration

From their 15N tracer results and an estimated deposition rate to forests of 5.1×1012 g nitrogen per year,, Nadelhofferet al.conclude that about 0.25×1015 g carbon per year is sequestered by northern temperate forests. Their 15N-tracer measurements are robust but there is a problem with their assump...

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Bibliographic Details
Published in:Nature (London) 1999-08, Vol.400 (6745), p.629-630
Main Author: Sievering, Herman
Format: Article
Language:English
Subjects:
Anisotropy
Atmospherics
Canopies
Carbon
Carbon sequestration
Deposition
Forest floor
Forests
Humanities and Social Sciences
multidisciplinary
Nitrogen
Science
Science (multidisciplinary)
scientific-correspondence
Simulation
Soil sciences
Temperate forests
Tracers
Trees
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Summary:From their 15N tracer results and an estimated deposition rate to forests of 5.1×1012 g nitrogen per year,, Nadelhofferet al.conclude that about 0.25×1015 g carbon per year is sequestered by northern temperate forests. Their 15N-tracer measurements are robust but there is a problem with their assumption that they have simulated atmospheric nitrogen deposition at forests by adding 15N tracers systematically to forest floors "in all cases". Atmospheric nitrogen deposition is actually intercepted by the forest canopy, particularly at the nine closed-canopy forests studied.
ISSN:0028-0836
1476-4687
DOI:10.1038/23176