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| Titel |
A young afforestation area in Iceland was a moderate sink to CO2 only a decade after scarification and establishment |
| VerfasserIn |
B. Bjarnadottir, B. D. Sigurdsson, A. Lindroth |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 6, no. 12 ; Nr. 6, no. 12 (2009-12-09), S.2895-2906 |
| Datensatznummer |
250004220
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| Publikation (Nr.) |
 copernicus.org/bg-6-2895-2009.pdf |
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| Zusammenfassung |
| This study reports on three years (2004–2006) of measurements of net
ecosystem exchange (NEE) over a young Siberian larch plantation in Iceland
established on previously grazed heathland pasture that had been scarified
prior to planting. The study evaluated the variation of NEE and its
component fluxes, gross primary production (GPP) and ecosystem respiration
(Re), with the aim to clarify how climatic factors controlled the
site's carbon balance. The young plantation acted as a relatively strong
sink for CO2 during all of the three years, with an annual net
sequestration of −102, −154, and −67 g C m−2 for 2004, 2005, and 2006,
respectively. This variation was more related to variation in carbon efflux
(Re) than carbon uptake (GPP). The abiotic factors that showed the
strongest correlation to Re were air temperature during the growing
season and soil water potential. The GPP mostly followed the seasonal
pattern in irradiance, except in 2005, when the plantation experienced
severe spring frost damage that set the GPP back to zero. It was not
expected that the rather slow-growing Siberian larch plantation would be such
a strong sink for atmospheric CO2 only twelve years after site
preparation and afforestation. |
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