Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.1080/10256016.2013.831089 |
| Titel (primär) | Nitrate turnover in a peat soil under drained and rewetted conditions: results from a [15N]nitrate-bromide double-tracer study |
| Autor | Russow, R.; Tauchnitz, N.; Spott, O.; Mothes, S.; Bernsdorf, S.; Meissner, R. |
| Quelle | Isotopes in Environmental and Health Studies |
| Erscheinungsjahr | 2013 |
| Department | ANA; BOPHY |
| Band/Volume | 49 |
| Heft | 4 |
| Seite von | 438 |
| Seite bis | 453 |
| Sprache | englisch |
| Keywords | bromide; denitrification; dissimilatory nitrate reduction; isotope ecology; nitrate consumption; nitrogen 15; peat soil rewetting |
| UFZ Querschnittsthemen | RU1 |
| Abstract | Under natural conditions, peatlands are generally nitrate-limited. However, recent concerns about an additional N input into peatlands by atmospheric N deposition have highlighted the risk of an increased denitrification activity and hence the likelihood of a rise of emissions of the greenhouse gas nitrous oxide. Therefore, the aim of the present study was to investigate the turnover of added nitrate in a drained and a rewetted peatland using a [15N]nitrate–bromide double-tracer method. The double-tracer method allows a separation between physical effects (dilution, dispersion and dislocation) and microbial and chemical nitrate transformation by comparing with the conservative Br− tracer. In the drained peat site, low NO3− consumption rates have been observed. In contrast, NO3− consumption at the rewetted peat site rises rapidly to about 100% within 4 days after tracer application. Concomitantly, the 15N abundances of nitrite and ammonium in soil water increased and lead to the conclusion that, besides commonly known NO3− reduction to nitrite (i.e. denitrification), a dissimilatory nitrate reduction to ammonium has simultaneously taken place. The present study reveals that increasing NO3− inputs into rewetted peatlands via atmospheric deposition results in a rapid NO3− consumption, which could lead to an increase in N2O emissions into the atmosphere. |
| Russow, R., Tauchnitz, N., Spott, O., Mothes, S., Bernsdorf, S., Meissner, R. (2013): Nitrate turnover in a peat soil under drained and rewetted conditions: results from a [15N]nitrate-bromide double-tracer study Isot. Environ. Health Stud. 49 (4), 438 - 453 10.1080/10256016.2013.831089 |
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