Experimental recolonisation of Baltic Sea reduced sediments: survival of benthic macrofauna and effects on nutrient cycling

Karlson, Karin; Hulth, Stefan; Ringdahl, Katja; Rosenberg, Rutger

doi:10.3354/meps294035

Cited by 98 publications

(98 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…dominates benthic macrofauna (Elmgren and Larsson 1997;Karlson et al 2011). Karlson et al (2005) showed that the bioturbation activity of M. affinis stimulated N 2 removal compared to non-bioturbated sediment, whereas recent experiments with conditioned sediment with and without Marenzelleria spp. demonstrated that denitrification rates were even lower in the presence of the polychaete (Bonaglia et al 2013).…”

Section: N Transformation Pathways In Himmerfjärdenmentioning

confidence: 99%

Seasonal oxygen, nitrogen and phosphorus benthic cycling along an impacted Baltic Sea estuary: regulation and spatial patterns

et al. 2014

View full text Add to dashboard Cite

The regulatory roles of temperature, eutrophication and oxygen availability on benthic nitrogen (N) cycling and the stoichiometry of regenerated nitrogen and phosphorus (P) were explored along a Baltic Sea estuary affected by treated sewage discharge. Rates of sediment denitrification, anammox, dissimilatory nitrate reduction to ammonium (DNRA), nutrient exchange, oxygen (O 2 ) uptake and penetration were measured seasonally. Sediments not affected by the nutrient plume released by the sewage treatment plant (STP) showed a strong seasonality in rates of O 2 uptake and coupled nitrification-denitrification, with anammox never accounting for more than 20 % of the total dinitrogen (N 2 ) production. N cycling in sediments close to the STP was highly dependent on oxygen availability, which masked temperaturerelated effects. These sediments switched from low N loss and high ammonium (NH 4 ? ) efflux under hypoxic conditions in the fall, to a major N loss system in the winter when the sediment surface was oxidized. In the fall DNRA outcompeted denitrification as the main nitrate (NO 3 -) reduction pathway, resulting in N recycling and potential spreading of eutrophication. A comparison with historical records of nutrient discharge and denitrification indicated that the total N loss in the estuary has been tightly coupled to the total amount of nutrient discharge from the STP. Changes in dissolved inorganic nitrogen (DIN) released from the STP agreed well with variations in sedimentary N 2 removal. This indicates that denitrification and anammox efficiently counterbalance N loading in the estuary across the range of historical and present-day anthropogenic nutrient discharge. Overall low N/P ratios of the regenerated nutrient fluxes impose strong N limitation for the pelagic system and generate a high potential for nuisance cyanobacterial blooms.

show abstract

Section: N Transformation Pathways In Himmerfjärdenmentioning

confidence: 99%

Seasonal oxygen, nitrogen and phosphorus benthic cycling along an impacted Baltic Sea estuary: regulation and spatial patterns

et al. 2014

View full text Add to dashboard Cite

show abstract

“…This could be observed in the Gulf of Mexico where sedimentary denitrification was remarkably reduced at oxygen concentrations in the overlying water below 31.2 µmol l −1 (Childs et al, 2002). Furthermore, it could be observed that under highly reducing conditions, dissimilatory nitrate reduction to ammonia (DNRA) becomes more and more important and seems to outcompete denitrification (Karlson et al, 2005).…”

Section: Nitrogen Removal Calculated From Different Sediment Mapsmentioning

confidence: 99%

Denitrification in sediments as a major nitrogen sink in the Baltic Sea: an extrapolation using sediment characteristics

et al. 2010

View full text Add to dashboard Cite

Abstract.Rates of denitrification in sediments were measured with the isotope pairing technique at different sites in the southern and central Baltic Sea. The rates varied between 0.5 µmol N m −2 h −1 in sands and 28.7 µmol N m −2 h −1 in muddy sediments and showed a good correlation to the organic carbon contents of the surface sediments. N-removal rates via sedimentary denitrification were estimated for the entire Baltic Sea calculating sediment specific denitrification rates and interpolating them to the whole Baltic Sea area. Another approach was carried out by using the relationship between the organic carbon content and the rate of denitrification. The N-removal by denitrification in sediments varied between 426-652 kt N a −1 , which is around 48-73% of the external N inputs delivered via rivers, coastal point sources, and atmospheric deposition. Moreover, an expansion of the anoxic bottom areas was considered under the assumption of a rising oxycline from 100 to 80 m water depth. This leads to an increase of the area with anoxic conditions and an overall decrease in sedimentary denitrification by 14%. Overall, we show here that this type of data extrapolation is a powerful tool to estimate the nitrogen losses for a whole coastal sea and may be applicable to other coastal regions and enclosed seas.

show abstract

“…The deposit-feeding pontoporeid amphipod Monoporeia affinis is of freshwater origin but can also cope with the brackish conditions in all but the southwesternmost parts of the Baltic Sea (Bonsdorff 2006). It resides in the upper few cm of soft bottom sediments during the day (Hill & Elmgren 1987, Karlson et al 2005) but can swim in the pelagic zone during the night (Lindström & Lindström 1980). M. affinis was the numerically dominant macrobenthos species in the Baltic proper (Ankar & Elmgren 1976, Ankar 1977 before an invasion by (3 sibling) spionid polychaete species of the genus Marenzelleria, which started in the 1980s (Ż mudziński et al 1996).…”

Section: Introductionmentioning

confidence: 99%

Nutrient fluxes from reduced Baltic Sea sediment: effects of oxygenation and macrobenthos

Ekeroth¹,

Blomqvist²,

Hall³

2016

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Effects of bottom water oxygenation and macrofaunal colonisation on benthic fluxes of nitrogen (N), phosphorus (P) and silicon (Si) from long-term anoxic Baltic Sea bottom sediment were investigated. Sediment boxcosms from an anoxic site at 150 m depth in the open Baltic proper were incubated in the laboratory to follow the development of benthic nutrient fluxes during 74 d exposure to flow-through of oxygen-rich water. In contrast to traditional end-point experimental designs, our repeated measurement approach allowed for separation of transient and long-term effects of oxygenation and bioturbation on benthic nutrient recycling. The composition, but not the rate, of the benthic total dissolved N efflux changed by oxygenation from being dominated by NH 4 in situ to being mostly composed of NO 2 + NO 3 and dissolved organic N (DON) under oxic conditions. Oxygenation in the boxcosms decreased the benthic efflux of dissolved silicate (DSi) and essentially shut off the in situ flux of dissolved inorganic phosphorus (DIP). After 20 d of oxygenation, 2 bottom macrofauna taxa, the polychaete Marenzelleria spp. and the amphipod Monoporiea affinis, were introduced to a subset of the boxcosms. Bioturbation by either taxa increased the efflux of dissolved inorganic N (DIN), DON and DSi to the overlying water. The Prich benthic flux under in situ anoxic conditions roughly approached Redfield N:P stoichiometry after oxygenation in the sediment boxcosms. Upon addition of macrofauna, bioturbation generated even higher N:P flux ratios.

show abstract

Experimental recolonisation of Baltic Sea reduced sediments: survival of benthic macrofauna and effects on nutrient cycling

Cited by 98 publications

References 54 publications

Seasonal oxygen, nitrogen and phosphorus benthic cycling along an impacted Baltic Sea estuary: regulation and spatial patterns

Seasonal oxygen, nitrogen and phosphorus benthic cycling along an impacted Baltic Sea estuary: regulation and spatial patterns

Denitrification in sediments as a major nitrogen sink in the Baltic Sea: an extrapolation using sediment characteristics

Nutrient fluxes from reduced Baltic Sea sediment: effects of oxygenation and macrobenthos

Contact Info

Product

Resources

About