Pore water phosphate and ammonia below the permanent halocline in the south-eastern Baltic Sea and their benthic fluxes under anoxic conditions

Graca, Bożena; Witek, Zbigniew; Burska, Dorota; Białkowska, I.; Łukawska‐Matuszewska, Katarzyna; Bolałek, Jerzy

doi:10.1016/j.jmarsys.2006.06.003

Cited by 32 publications

(29 citation statements)

References 36 publications

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“…Total NH 4 + concentrations varied from 0.41 to 0.92 µmol cm −3 wet sediment while those in pore water ranged from 0.14 to 0.59 µmol cm −3 wet sediment (~191.38 and 786.23 µM, respectively). The latter were similar to the ones determined in other impacted coastal environments of high latitude (Pollehne 1986;Conley et al 1997;Tuominen et al 1999;Maksymowska-Brossard and Piekarek-Jankowska 2001;Graca et al 2006). …”

Section: Sediment Quality In Encerrada Baysupporting

confidence: 89%

Environmental Characterization of a Eutrophicated Semi-Enclosed System: Nutrient Budget (Encerrada Bay, Tierra del Fuego Island, Patagonia, Argentina)

Torres

Gil

Amin

et al. 2009

Water Air Soil Pollut

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Encerrada Bay (EB) is located in the far south of Argentina, on the north coast of the Beagle Channel and is artificially connected with Ushuaia Bay (UB). This study was carried out between 2004 and 2005; and assesses the impact of Ushuaia city to the nutrient dynamics in EB. It was focused on physical and chemical characterization of discharges, water and sediment quality, nutrient benthic fluxes, and water exchange with UB. The average ammonium, nitrate, phosphate and silicate concentrations in the water bay were 99.5±30.7; 10.0±4.2; 2.0±0.7; 23.5±2.9 µM, respectively. Benthic fluxes showed a consumption of oxygen (50-450 mg m −2 h −1 ) and nitrate (20-416 µmol m −2 h −1 ) by sediment and release of ammonium (79−4,772 µmol m −2 h −1 ) and phosphate (27-36 µmol m −2 h −1 ) into the water column. The daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day −1 and between 4 and 22 kg day −1 respectively, while the net average export fluxes to UB were 41.7 kg day −1 of nitrogen and 15.7 kg day −1 of phosphate. The difference between received and exported nutrients is consumed in EB by primary producers, partially buffering the impact of wastewater in UB at its own eutrophication risk.

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Section: Sediment Quality In Encerrada Baysupporting

confidence: 89%

Environmental Characterization of a Eutrophicated Semi-Enclosed System: Nutrient Budget (Encerrada Bay, Tierra del Fuego Island, Patagonia, Argentina)

Torres

Gil

Amin

et al. 2009

Water Air Soil Pollut

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“…As evidenced by the analysis of the variability of these parameters in the sediment profile, there was a decrease in the organic matter content in the deeper layers, similar to that observed in other studies (Niemirycz & Jankowska 2011, Graca 2006.…”

Section: Accumulation Of Pcp -Sediment/bottom Water Properties Relatisupporting

confidence: 88%

Factors determining the accumulation of pentachlorophenol — a precursor of dioxins in bottom sediments of the Gulf of Gdańsk (Baltic Sea)

Kobusińska

Skauradszun

Niemirycz

2014

Oceanological and Hydrobiological Studies

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“…High values of the phosphate flux at this station resulted from the slope processes, such as sediment slumping and creep. Similarly to the previous work (Graca et al 2006), phosphate profiles on the slope of the Gdańsk Deep (station GD10) were more convex, and pore waters were saturated closer to the sediment surface than in the Gdańsk Deep. In fact, phosphate concentration in the pore water within the top sediment layer (0 -4 cm) at station GD10 was the highest among all the sampling sites (Fig.…”

Section: Discussionsupporting

confidence: 78%

“…for the Gulf of Finland [(1.59 -28.5 μmol m −2 h −1 (Conley et al 1997), and 0.67 -17.5 μmol m −2 h −1 (Pitkänen et al 2003)], the Gdańsk Deep and the Oblique Sill separating the Gdańsk and Gotland Deeps (2.9 -5.7 μmol m −2 h −1 ; Graca et al 2006), and the northern Baltic proper (-1.7 -37 μmol m −2 h −1 ; Koop et al 1990). …”

Section: Discussionmentioning

confidence: 99%

Phosphate exchange across the sediment-water interface under oxic and hypoxic/anoxic conditions in the southern Baltic Sea

Łukawska‐Matuszewska

Burska

2011

Oceanological and Hydrobiological Studies

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Benthic fluxes of phosphate and phosphorus distribution in sediments from the southern Baltic Sea were investigated in spring and autumn in 2005 and 2007-2010. Strong spatial variability of phosphate fluxes was observed across the sediment-water interface. The highest values of phosphate flux from sediment (up to 37 μmol m −2 h −1 ), resulting from the high mineralization rate of organic matter and rapid phosphorus turnover due to macrofaunal activity and hydrodynamic conditions, were observed in the shallow area at depths ranging from 50 to 69 m. The rate of phosphate exchange in the transportation and accumulation bottom area with the water depth ≥72 m was several times lower (2.12 -6.22 μmol m −2 h −1 ). In continuously hypoxic or anoxic sediments, phosphorus was preserved in the refractory organic form, and sediments were depleted of redox-dependent phosphorus forms. In shallow area with well oxygenated near-bottom water, phosphorus was present mainly in the calcium-bound form.

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Pore water phosphate and ammonia below the permanent halocline in the south-eastern Baltic Sea and their benthic fluxes under anoxic conditions

Cited by 32 publications

References 36 publications

Environmental Characterization of a Eutrophicated Semi-Enclosed System: Nutrient Budget (Encerrada Bay, Tierra del Fuego Island, Patagonia, Argentina)

Environmental Characterization of a Eutrophicated Semi-Enclosed System: Nutrient Budget (Encerrada Bay, Tierra del Fuego Island, Patagonia, Argentina)

Factors determining the accumulation of pentachlorophenol — a precursor of dioxins in bottom sediments of the Gulf of Gdańsk (Baltic Sea)

Phosphate exchange across the sediment-water interface under oxic and hypoxic/anoxic conditions in the southern Baltic Sea

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