Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1007/s10533-008-9194-7 |
| Document | Shareable Link |
| Title (Primary) | Denitrification and N2O effluxes in the Bothnian Bay (northern Baltic Sea) river sediments as affected by temperature under different oxygen concentrations |
| Author | Silvennoinen, H.; Liikanen, A.; Torssonen, J.; Stange, C.F.; Martikainen, P.J. |
| Source Titel | Biogeochemistry |
| Year | 2008 |
| Department | BOPHY |
| Volume | 88 |
| Issue | 1 |
| Page From | 63 |
| Page To | 72 |
| Language | englisch |
| Keywords | Baltic Sea; Denitrification and nitrous oxide effluxes; 15N; Oxygen concentration; River sediments; Temperature |
| Abstract | Denitrification rates and nitrous oxide (N2O) effluxes were measured at different temperatures and for different oxygen concentrations in the sediments of a eutrophied river entering the Bothnian Bay. The experiments were made in a laboratory microcosm with intact sediment samples. 15N-labelling was used to measure denitrification rates (Dw). The rates were measured at four temperatures (5, 10, 15 and 20°C) and with three oxygen inputs (<0.2, 5, and 10 mg O2 l-1). The temperature response was highly affected by oxygen concentration. At higher O2 concentrations (5 and 10 mg O2 l-1) a saturation over 10°C was observed, whereas the anoxic treatment (<0.2 mg O2 l-1) showed an exponential increase in the temperature interval with a Q 10 value of 3.1. The result is described with a combined statistical model. In contrast with overall denitrification, the N2O effluxes from sediments decreased with increasing temperature. The N2O effluxes had a lower response to oxygen than denitrification rates. The N2O/N2 ratio was always below 0.02. Increased temperatures in the future could enhance denitrification rates in boreal river sediments but would not increase the amount of N2O produced. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=1467 |
| Silvennoinen, H., Liikanen, A., Torssonen, J., Stange, C.F., Martikainen, P.J. (2008): Denitrification and N2O effluxes in the Bothnian Bay (northern Baltic Sea) river sediments as affected by temperature under different oxygen concentrations Biogeochemistry 88 (1), 63 - 72 10.1007/s10533-008-9194-7 |
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