Benthic fluxes and nitrate reduction activity in a marine park (Northern San Jorge Gulf) from Patagonia Argentina

Torres, Américo Iadran; Faleschini, Mauricio; Esteves, José Luís

doi:10.1007/s12665-016-5628-z

Cited by 5 publications

(9 citation statements)

References 30 publications

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“…The magnitude of these fluxes is characteristic of each environment because the fluxes are strongly influenced by physical processes such as sediment resuspension, hydrodynamic conditions, sediment granulometry, and seawater temperature (Niencheski and Janhke, 2002;Sakamaki et al, 2006;Grenz et al, 2010). In addition, bioturbation and bio-irrigation (Fanjul et al, 2007), pore water chemistry, and organic matter content contribute significantly to nutrient concentrations (Torres et al, 2009(Torres et al, , 2016Gil et al, 2011Gil et al, , 2014. Torres et al (2016) made the only measurements of benthic fluxes in the northern zone of the SJG and found that sediment consumed DO and nitrate, and released phosphate, silicic acid, and ammonium into the water column.…”

Section: Additional Nutrient Sources For San Jorge Gulfmentioning

confidence: 99%

“…In addition, bioturbation and bio-irrigation (Fanjul et al, 2007), pore water chemistry, and organic matter content contribute significantly to nutrient concentrations (Torres et al, 2009(Torres et al, , 2016Gil et al, 2011Gil et al, , 2014. Torres et al (2016) made the only measurements of benthic fluxes in the northern zone of the SJG and found that sediment consumed DO and nitrate, and released phosphate, silicic acid, and ammonium into the water column.…”

Section: Additional Nutrient Sources For San Jorge Gulfmentioning

confidence: 99%

See 1 more Smart Citation

Dynamics of Macronutrients in the San Jorge Gulf During Spring and Summer

Torres¹,

Paparazzo²,

Williams³

et al. 2018

Oceanog

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Section: Additional Nutrient Sources For San Jorge Gulfmentioning

confidence: 99%

Section: Additional Nutrient Sources For San Jorge Gulfmentioning

confidence: 99%

Dynamics of Macronutrients in the San Jorge Gulf During Spring and Summer

Torres¹,

Paparazzo²,

Williams³

et al. 2018

Oceanog

View full text Add to dashboard Cite

“…In this gulf, an economically significant fishery (Glembocki et al 2015) and oil industriesincluding production, offshore drilling and transit of tankers-are developed (Silwan 2001). Furthermore, regional oil and fishing industries encompass substantial reproductive and foraging grounds of many marine birds and mammals (Torres et al 2016). It has a shallow-water region (45-75 m depth) near 46° 48′ S, 65° 43′ W, where the formation of the seasonal pycnocline is restricted by intense vertical mixing due to high bottom friction.…”

Section: Study Areamentioning

confidence: 99%

A global record of particulated metals on the southwestern Atlantic shelf (Argentine Sea)

et al. 2021

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The Argentine Sea (Southwestern Atlantic) is one of the most productive ecosystem in the Southern Hemisphere. Research on metals in this region is scarce or null. In this study, we evaluated the concentrations of some metals in the suspended particulate matter (SPM), to provide baseline data that would enable us to understand the role of the SPM in the transport of metals in the Argentine Sea. Sampling was carried out during the austral summer 2016 at 20 stations distributed in the Argentine Sea. Surface seawater samples were collected and then filtered by vacuum through Millipore ® HAWP 04,700 filters (0.45 µm). The samples were acid-digested (HNO 3 and HClO 4 , 5:1) and the metal concentrations were determined with ICP-OES Optima 2100 DV (Perkin Elmer). Significant spatial variations were detected due to the extension of the study area, with the highest levels of metals in the stations next to large urban centers (

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“…NRR has also been studied in batch reactors inoculated with activated sludge cultures, with a previous acclimation procedure (Albina et al 2019). Moreover, many methods have been used to estimate the nitrogen dynamic in sediments: benthic chamber (Torres et al 2016;Faleschini and Esteves 2013), experiments using labeled nitrogen (Enrich-Prast et al 2016), in vitro incubation corer with sediment (Gardner et al 2006), the acetylene inhibition technique (Lindau et al 2011), and flow-through reactors (FTR) (Evrard et al 2013). The last method was developed by Northby (1976) and adapted for microbiological processes by Esteves et al (1986).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen dynamic in vitro using sludge of a sewage stabilization pond from Patagonia (Argentina)

Faleschini

Torres

2021

Environ Sci Pollut Res

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A relevant and current aspect of wastewater treatment systems is related to the processes of the nitrogen cycle that results in its elimination in gaseous forms. In the present study, we report the first measurements of nitrate-reducing rate (NRR) at lab-scale, using the flow-through reactor technique with sludge of a sewage stabilization pond system located in Patagonia (Argentina). Sludge was collected from Inlet and Outlet areas, in winter and summer. The sludge was characterized by having high moisture content (>94%) and organic matter concentration greater than 37%. The nitrate reduction experimental dates fitted significantly to the Michaelis-Menten model, allowing the estimation of the parameters that regulate the NR kinetics. The maximum potential nitrate reduction rate (R max ) showed great variability, registering a maximum of 131.6 μmol-N•gdw −1 •h −1 (Outlet-Summer) and a minimum of 4.1 μmol-N•gdw −1 •h −1 (Inlet-Winter). The lowest half saturation constant (K m ) was recorded in the Inlet sludge during the winter (6.1 mg N-NO 3 − •L −1 ), which indicates a greater affinity for nitrate of this bacterial consortium. An unusually high activity of NR was registered, being higher with sludge from the Outlet zone and with summer temperature. In full-scale ponds, the NR activity could explain a relevant part of the nitrogen removal that involves the escape of gaseous forms.

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Benthic fluxes and nitrate reduction activity in a marine park (Northern San Jorge Gulf) from Patagonia Argentina

Cited by 5 publications

References 30 publications

Dynamics of Macronutrients in the San Jorge Gulf During Spring and Summer

Dynamics of Macronutrients in the San Jorge Gulf During Spring and Summer

A global record of particulated metals on the southwestern Atlantic shelf (Argentine Sea)

Nitrogen dynamic in vitro using sludge of a sewage stabilization pond from Patagonia (Argentina)

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