Riverine discharge into a coastal bay: A stable isotope study in the Gulf of Gdańsk, Baltic Sea

<I>nirS</I>-containing denitrifier communities in the water column and sediment of the Baltic Sea

“…Furthermore, both locations were characterized by different anthropogenic influence (Hübel et al, 1998). In contrast to the Baltic proper, coastal areas are affected by high riverine nitrogen inputs which lead to high denitrification N-losses (Voss et al, 2005), but for the coastal area included in our study summertime denitrification rates were low (Dahlke, 1990).…”

“…Water masses are exchanged horizontally between coastal areas and the central Baltic (minimal flow velocity: <1 cm s −1 ; Maagard and Rheinheimer, 1974) and vertically between water column and sediment. Despite the fact that the Baltic proper may represent a closed circulation cell (Voss et al, 2005) approximately once in a decade an inflow of North Sea water occurs. This happened in 2003 when a massive inflow of 200 km 3 deep oxygenated North Sea water with a high salinity occurred from spring till summer (Feistel et al, 2003a, b).…”

“…The water column in these shallow water areas is mixed thoroughly, therefore anoxic conditions occur only in the sediments. There is evidence that coastal sediments are very important in removal of riverborne nitrogen by denitrification (Voss et al, 2005). Denitrification rates have been measured in Baltic sediments (e.g.…”

Nitrogen removal of a Myriophyllum elatinoides purification system for treating piggery wastewater in karst region

“…In previous studies, not only are these plants able to uptake the N from the wastewater, but the microbial processes in the sediments of these plant purification systems remove primarily N [14]. The removal of N from aquatic environments by denitrification has been reported to be particularly important for coastal sediments [11,15,16]. Finally, based on the results of this study, potential benefits of the integration of eco-wetland into agricultural wastewater to reduce N concentrations are apparent.…”

An assessment of upper ocean carbon and nitrogen export fluxes on the boreal continental shelf: A 3‐year study in the open Baltic Sea comparing sediment traps, 234Th proxy, nutrient, and oxygen budgets

“…The annual average wet and dry N deposition to the open Baltic Sea has been estimated to 1000 mg N m -2 y -1 by Lindfors et al (1993). The contribution of terrestrial N input to the surface ocean ecosystem in the open Baltic has been suggested to be negligible (Voss et al 2005). Supporting that only a minor terrestrial contribution is provided is the observation that total nitrogen (TN) increase in the mixed layer is similar in all areas of the open Baltic proper; this elevated TN in the open Baltic is higher than in more coastal and river-runoff influenced waters, and the total phosphorous (TP) is simultaneously decreasing (Larsson et al 2001).…”