%0 Journal article
%A Zak, Dominik
%A Cabezas, Alvaro
%A Rudnick, Sebastian
%A Hallermann, Jan
%A Gelbrecht, Jörg
%T Einfluss einer potenziellen Flachabtorfung auf den Nitratrückhalt und die Phosphorfreisetzung in wiedervernässten Niedermooren – dargestellt am Beispiel des Kleinen Landgrabentals (Mecklenburg-Vorpommern)
%R 10.23689/fidgeo-2965
%J TELMA - Berichte der Deutschen Gesellschaft für Moor- und Torfkunde
%V 42

%X Abstract: Hydrological conditions at the Kleiner Landgraben Valley (Neubrandenburg, NE Germany) were planned to be modified as a part of the Mecklenburg-Vorpommern peatland conservation program. Before restoring hydrological conditions, extensive top-soil removal from drained fens was also scheduled. By doing so, phosphorus, ammonia and methane release from rewetted fens is pretended to be strongly reduced. Moreover, a marked nitrate export reduction is expected, what will decrease N fluxes into the Baltic Sea. Several field and laboratory experiments were performed in the period 2009-2012 in order to evaluate: a) the influence of agricultural activities in the catchment on nutrient load over the lowland fens and nutrient export from drained fens site; b) the groundwater fluctuation at drained fen, c) the phosphorus release potential from the upper peat layer, and d) the impact of top-soil removal on the level of phosphorus concentrations in the surface water of inundated peatlands. Such previous research served as a basis of a laboratory experiment aiming to investigate the influence of the degree of peat decomposition, temperature and N load over nitrate removal and phosphorus turnover. According to our results, nitrate is efficiently removed from highly degraded peat (up to 90 %), whereas phosphorus release decreased at increasing nitrate load and is negligible in less decomposed peat. Moreover, moderately decomposed peat was also observed to have a high nitrate removal potential. Our results provide useful insights for the management of rewetted fens, and can be applied in another agricultural watershed within the NE Germany glacial landscape.
%U http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/7279
%~  FID GEO-LEO e-docs