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| Titel |
Short-term effects of thinning, clear-cutting and stump harvesting on methane exchange in a boreal forest |
| VerfasserIn |
E. Sundqvist, P. Vestin, P. Crill, T. Persson, 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 ; 11, no. 21 ; Nr. 11, no. 21 (2014-11-12), S.6095-6105 |
| Datensatznummer |
250117668
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| Publikation (Nr.) |
 copernicus.org/bg-11-6095-2014.pdf |
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| Zusammenfassung |
| Forest management practices can alter soil conditions, affecting the
consumption and production processes that control soil methane (CH4)
exchange. We studied the short-term effects of thinning, clear-cutting and
stump harvesting on the CH4 exchange between soil and atmosphere at a
boreal forest site in central Sweden, using an undisturbed plot as the
control. Chambers in combination with a high-precision laser gas analyser
were used for continuous measurements. Both the undisturbed plot and the
thinned plot were net sinks of CH4, whereas the clear-cut plot and the
stump harvested plot were net CH4 sources. The CH4 uptake at the
thinned plot was reduced in comparison to the undisturbed plot. The shift
from sink to source at the clear-cut and stump harvested plots was probably
due to a rise in the water table and an increase in soil moisture, leading to
lower gas diffusivity and more reduced conditions, which favour CH4
production by archea. Reduced evapotranspiration after harvesting leads to
wetter soils, decreased CH4 consumption and increased CH4
production, and should be accounted for in the CH4 budget of managed
forests. |
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