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| Titel |
Nitrous oxide uptake rates in boreal coniferous forests are associated with soil characteristics |
| VerfasserIn |
Henri Siljanen, Christina Biasi, Pertti Martikainen |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250098022
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| Publikation (Nr.) |
 EGU/EGU2014-13657.pdf |
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| Zusammenfassung |
| Nitrous oxide (N2O) is a strong greenhouse gas and a significant contributor to the
destruction of the ozone layer. The radiative forcing of N2O is considered to be 320 more
efficient than carbon dioxide.The major portion of global N2O is emitted from agricultural
soils. There are studies suggesting that N2O has also a sink in forest soils. However there is
relatively limited knowledge on factors controlling N2O consumption in forest soils. Hence
N2O consumption was studied in boreal coniferous forests having different forest cover, soil
chemical and physical structure and land-use history. The N2O consumption was measured
by static chamber technique in the field across spatio-seasonal sampling design. Typical and
atypical denitrifiers were quantified with nosZ functional gene marker. Additionally chemical
and physical environmental parameters were analyzed to link N2O flux, microbial
community and composition of soils. Nitrous oxide uptake could be associated with
specific ecosystem and environmental conditions. Soil physical structure and land-use
history were shown to be prior factors determining the strength of the uptake rate. |
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