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| Titel |
Temporal variability and drivers of net ecosystem production of a Turkey oak forest in Italy under coppice management |
| VerfasserIn |
Luca Belelli Marchesini, Ana Rey, Dario Papale, Riccardo Valentini |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250039302
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| Zusammenfassung |
| The progress in the understanding of the carbon exchange between forests and the
atmosphere has been dramatic over the last few years, yet largely based on observations of
middle-aged or mature stands in the temperate and boreal region while quite a few studies
report on the temporal dynamics of carbon balance in forest stand chronosequences taking
into account the effect of forest management (Law et al., 2003; Kowalski et al., 2003; Kolari
et al, 2004; Zha et al., 2009).
In order to quantify the temporal variability of CO2 fluxes at ecosystem level following
coppicing, we analyze eddy covariance data of a deciduous oak (Quercus cerris L.) coppice
forest in central Italy (Roccarespampani, VT) collected over two differently aged forest
stands in the period 2000-2006 and covering most of the rotation period (0-6; 11-15
years).
Data processing was performed evenly for whole data-set according to the CarboEurope
database standard (Papale et al., 2006). The inter-annual variability and seasonal dynamics of
net ecosystem exchange (NEE), partitioned into ecosystem respiration (Reco) and gross
primary production (GPP), were analyzed looking at the relationships with the main
structural (biomass) and environmental drivers (air and soil temperature, precipitation, soil
water content, vapour pressure deficit, global radiation) to understand which factors control
the carbon dynamics of these intensively managed forests
After harvesting the forest acted as a carbon source of 69 gC m-2, while in the following
years NEE ranged from -18.9 (stand age: 2 years) to -1077.9 g C m-2yr-1 (stand age: 15
years). Evidently the ecosystem promptly recovers its carbon sink capacity already in the
years shortly after the harvest and increases its carbon sequestration capacity with stand
age (R2= 0.75, P |
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