Elevated atmospheric carbon dioxide increases soil carbon

Elevated atmospheric carbon dioxide increases soil carbon

The general lack of significant changes in mineral soil C stocks during CO2 -enrichment experiments has cast doubt on predictions that increased soil C can partially offset rising atmospheric CO2 concentrations. Here, we show, through meta-analysis techniques, that these experiments collectively exh...

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Veröffentlicht in:Global change biology. - 1999. - 11(2005), 12 vom: 28. Dez., Seite 2057-2064
1. Verfasser: Jastrow, Julie D (VerfasserIn)
Weitere Verfasser: Michael Miller, R, Matamala, Roser, Norby, Richard J, Boutton, Thomas W, Rice, Charles W, Owensby, Clenton E
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2005
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article 13C stable isotope FACE experiment carbon sequestration meta-analysis microaggregates open-top chamber roots soil organic matter sweetgum forest tallgrass prairie grassland
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520 |a The general lack of significant changes in mineral soil C stocks during CO2 -enrichment experiments has cast doubt on predictions that increased soil C can partially offset rising atmospheric CO2 concentrations. Here, we show, through meta-analysis techniques, that these experiments collectively exhibited a 5.6% increase in soil C over 2-9 years, at a median rate of 19 g C m-2  yr-1 . We also measured C accrual in deciduous forest and grassland soils, at rates exceeding 40 g C m-2  yr-1 for 5-8 years, because both systems responded to CO2 enrichment with large increases in root production. Even though native C stocks were relatively large, over half of the accrued C at both sites was incorporated into microaggregates, which protect C and increase its longevity. Our data, in combination with the meta-analysis, demonstrate the potential for mineral soils in diverse temperate ecosystems to store additional C in response to CO2 enrichment 
650 4 |a Journal Article 
650 4 |a 13C stable isotope 
650 4 |a FACE experiment 
650 4 |a carbon sequestration 
650 4 |a meta-analysis 
650 4 |a microaggregates 
650 4 |a open-top chamber 
650 4 |a roots 
650 4 |a soil organic matter 
650 4 |a sweetgum forest 
650 4 |a tallgrass prairie grassland 
700 1 |a Michael Miller, R  |e verfasserin  |4 aut 
700 1 |a Matamala, Roser  |e verfasserin  |4 aut 
700 1 |a Norby, Richard J  |e verfasserin  |4 aut 
700 1 |a Boutton, Thomas W  |e verfasserin  |4 aut 
700 1 |a Rice, Charles W  |e verfasserin  |4 aut 
700 1 |a Owensby, Clenton E  |e verfasserin  |4 aut 
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773 1 8 |g volume:11  |g year:2005  |g number:12  |g day:28  |g month:12  |g pages:2057-2064 
856 4 0 |u http://dx.doi.org/10.1111/j.1365-2486.2005.01077.x  |3 Volltext 
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