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| Titel |
Carbon balance of an old hemi-boreal pine forest in Southern Estonia
determined by different methods |
| VerfasserIn |
Kaido Soosaar, Kalev Repp, Krista Lõhmus, Veiko Uri, Kaire Rannik, Alisa Krasnova, Ivika Ostonen, Mai Kukumägi, Martin Maddison, Ülo Mander |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250137046
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| Publikation (Nr.) |
 EGU/EGU2016-18229.pdf |
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| Zusammenfassung |
| The Soontaga Forest Station is located in hemi-boreal 200-years old pine forest (South
Estonia; 58o01’N 26o04’E) with a second layer of spruce. The station has the instrumentation
to assess the exchange of carbon dioxide (net ecosystem exchange, NEE), soil respiration,
tree biomass (above and below ground biomass) and different environmental and
meteorological parameters.
In this study we quantified carbon balance by analyzing eddy-covariance CO2 flux data
(carbon exchange) vs chamber-based measurements (ecosystem respiration) and
CO2assimilation (soil and biomass).
The annual NEE in this mature coniferous forest was -2.3 t C ha yr−1, showing a clear
diurnal and seasonal trend. During the daytime in summer the forest sequestered CO2, while
during the night and late night CO2 emitted from the ecosystem to the atmosphere.
Within the growing period, the sequestration of CO2 by plants was greater than
soil respiration. Thus, the ecosystem sequestered carbon. Most of the carbon is
bound in tree biomass (above and below ground biomass) but as well into soil,
while the sequestration in soil increases with stand age. In addition, the biomass
of understory, especially belowground litter, is playing essential part in carbon
input.
A modelling approach of long-term C budget in the Soontaga pine forest is presented. |
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