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The Role of Nitrogen in the Response of Forest Net Primary Production to Elevated Atmospheric Carbon Dioxide

The Role of Nitrogen in the Response of Forest Net Primary Production to Elevated Atmospheric... Net primary production (NPP) is the net rate at which the vegetation in an ecosystem captures carbon from the atmosphere. Forests, which cover 43% of the terrestrial biosphere, are potentially responsible for 72% of annual global terrestrial lNPP (69). Humans rely on a portion of this production for fiber, fuel, and f;ood. During the past 250 years the combustion of fossil fuels and deforestation have increased atmospheric carbon dioxide from preindustrial levels of approximately 280 ppmv to 353 ppmv in 1990 (128). The projection is that CO2 concentrations will reach 500 ppmv by the year 2040, and 800 ppmv by the year 2100, if no steps are taken to limit CO2 emissions (128). This projection necessitates that the scientific community advance its under­ standing concerning the sensitivity of forest NPP to elevated CO2• The availability of inorganic nitrogen often limits production in terrestrial ecosystems, and increased forest production in response to nitrogen fertiliza­ tion has been observed in numerous studies (63-65, 122). A number of studies have recently reviewed various aspects of NPP response to elevated CO2 (3, 14, 16, 38, 42, 44, 76, 83, 93, 98, 102, 127, 134). Many of the reviews identify uncertainties that represent http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annual Review of Ecology, Evolution, and Systematics Annual Reviews

The Role of Nitrogen in the Response of Forest Net Primary Production to Elevated Atmospheric Carbon Dioxide

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References (86)

Publisher
Annual Reviews
Copyright
Copyright 1995 Annual Reviews. All rights reserved
Subject
Review Articles
ISSN
0066-4162
DOI
10.1146/annurev.es.26.110195.002353
Publisher site
See Article on Publisher Site

Abstract

Net primary production (NPP) is the net rate at which the vegetation in an ecosystem captures carbon from the atmosphere. Forests, which cover 43% of the terrestrial biosphere, are potentially responsible for 72% of annual global terrestrial lNPP (69). Humans rely on a portion of this production for fiber, fuel, and f;ood. During the past 250 years the combustion of fossil fuels and deforestation have increased atmospheric carbon dioxide from preindustrial levels of approximately 280 ppmv to 353 ppmv in 1990 (128). The projection is that CO2 concentrations will reach 500 ppmv by the year 2040, and 800 ppmv by the year 2100, if no steps are taken to limit CO2 emissions (128). This projection necessitates that the scientific community advance its under­ standing concerning the sensitivity of forest NPP to elevated CO2• The availability of inorganic nitrogen often limits production in terrestrial ecosystems, and increased forest production in response to nitrogen fertiliza­ tion has been observed in numerous studies (63-65, 122). A number of studies have recently reviewed various aspects of NPP response to elevated CO2 (3, 14, 16, 38, 42, 44, 76, 83, 93, 98, 102, 127, 134). Many of the reviews identify uncertainties that represent

Journal

Annual Review of Ecology, Evolution, and SystematicsAnnual Reviews

Published: Nov 1, 1995

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