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| Titel |
Carbon and greenhouse gas balance of a temperate pine afforestation chronosequence |
| VerfasserIn |
Matthias Peichl, Altaf Arain, Tim R. Moore, J. J. Brodeur, Myroslava Khomik, Sami Ullah, Janelle Trant, Robin Thorne |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250078736
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| Zusammenfassung |
| We determined the carbon (C) and greenhouse gas (GHG) balance for an age-sequence of four (7, 20, 35, and 70 years old) afforested white pine (Pinus strobus L.) forests in southern Ontario, Canada. The annual net ecosystem production (NEP) derived from biometric and eddy-covariance (EC) data was combined with estimates of the dissolved organic carbon (DOC) export to obtain the annual net ecosystem carbon balance (NECB). Static chamber measurements of methane (CH4) and nitrous oxide (N2O) fluxes were conducted throughout the snow free periods. The average contribution of DOC export to the NECB decreased from 8% at the 7-year old stand to <1% at the three older stands. The combined contribution from exchanges of CH4 and N2O to the global warming potential (GWP) was estimated at 9% in the 7-year old stand and at 5% in the mature 70-year old stand indicating a significant contribution to the GHG balance of temperate pine forests in early and late development stages. In the two middle-aged stands however, this contribution was <1% and integrated over the entire succession period, the GWP of these forests was driven by the CO2 exchange. Furthermore, our results indicate a large potential for net C sequestration through afforestation of marginal agricultural land ranging between 130 t C ha-1 for low-productive stands to 250 t C ha-1 in high productive pine stands over a period of 70 years. |
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