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...
| Veröffentlicht in: | Global change biology. - 1999. - 11(2005), 12 vom: 28. Dez., Seite 2057-2064 |
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| Weitere Verfasser: | , , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2005
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| 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 |
| Zusammenfassung: | 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 |
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| Beschreibung: | Date Revised 07.01.2022 published: Print Citation Status PubMed-not-MEDLINE |
| ISSN: | 1365-2486 |
| DOI: | 10.1111/j.1365-2486.2005.01077.x |