Seasonal benthic organic matter mineralisation measured by oxygen uptake and denitrification along a transect of the inner and outer River Thames estuary, UK

@article{Trimmer2000SeasonalBO,
  title={Seasonal benthic organic matter mineralisation measured by oxygen uptake and denitrification along a transect of the inner and outer River Thames estuary, UK},
  author={Mark Trimmer and David B. Nedwell and David Sivyer and Stephen J. Malcolm},
  journal={Marine Ecology Progress Series},
  year={2000},
  volume={197},
  pages={103-119}
}
Seasonal measurements of organic matter mineralisation by oxygen uptake and denitrification were carried out from July 1996 to March 1998 along a -200 km transect of the River Thames estuary, UK. There was a distinct gradient of decreasing rates of organic matter mineralisation seaward, which was related to the concentration of suspended solids and sedimentary organic carbon (C) at each site. There was clear seasonality and highest rates of oxygen uptake (10 056 pmol O 2 m -2 h -1 ) at the… 

Contribution of denitrification to nitrogen, carbon, and oxygen cycling in tidal creek sediments of a New England salt marsh

The contribution of denitrification to sediment metabolism was studied at 2 sites (muddy and sandy) in unvegetated tidal creek sediments from a small Cape Cod, USA, salt marsh receiving

Physico-biogeochemical controls on benthic pelagic coupling of nutrient fluxes and recycling in a coastal upwelling system

Sediment incubation microcosms, multitrap apparatus and water column variables have been employed to describe the dynamic changes in benthic-pelagic coupling between nutrient pools in the Pontevedra

An Underestimated Contribution of Deltaic Denitrification in Reducing Nitrate Export to the Coastal Zone (Po River–Adriatic Sea, Northern Italy)

In transitional environments, the role of sediments biogeochemistry and denitrification is crucial for establishing their buffer potential against nitrate (NO3−) pollution. The Po River (Northern

Carbon and nitrogen cycling on intertidal mudflats in a temperate Australian estuary

The sources of organic matter, benthic metabolism (light/dark 02 and TCO2 fluxes), benthic dissolved nitrogen fluxes, denitrification, nitrogen fixation and sediment NH4+ production were studied on

Changes in Benthic Denitrification, Nitrate Ammonification, and Anammox Process Rates and Nitrate and Nitrite Reductase Gene Abundances along an Estuarine Nutrient Gradient (the Colne Estuary, United Kingdom)

Numbers of narG genes declined along the estuary, while napA gene numbers were stable, suggesting that NAP-mediated nitrate reduction remained important at low nitrate concentrations, and log-log relationships indicate an underlying relationship between the genetic potential for nitrate Reduction and the corresponding process activity.

Impact of long-term benthic trawl disturbance on sediment sorting and biogeochemistry in the southern North Sea

Biogeochemical processes in the upper layers of sediment, both oxic and suboxic, seemed unaffected by trawling in the long- term, but in deeper anoxic sediment, mineralisation via sulphate reduction may be stimulated by the extra disturbance, at least in areas where tidal energy is slight.

Environmental controls of anammox and denitrification in southern New England estuarine and shelf sediments

We measured denitrification and anammox potential rates in homogenized sediments over two annual cycles from two estuarine sites (Providence River estuary and Narragansett Bay) and two continental
...

References

SHOWING 1-10 OF 45 REFERENCES

Seasonal benthic microbial activity in the southern North Sea ; oxygen uptake and sulphate reduction

The results demonstrate that the bottom sediments are important sites of organic degradation in the North Sea system.

High nitrate, muddy estuaries as nitrogen sinks: the nitrogen budget of the River Colne estuary (United Kingdom)

The muddy estuary of the River Colne, east coast UK, is hypernutrified, with strong gradients of N 0 3 a n d NH,+up the estuary, which implies that any environmental impact in coastal waters may be the result of much lower loads of nitrogen than hitherto assumed.

Variations in sedimentary carbon remineralization rates in the White Oak River estuary, North Carolina

Rates of microbially mediated sedimentary organic carbon remineralization vary along the salinity gradient of the White Oak River estuary, N.C. A direct comparison of two sites, one upriver dominated

Denitrification in a coastal sediment measured in situ by the nitrogen isotope pairing technique applied to a benthic flux chamber

A free operating benthic flux chamber lander (ELINOR) was used to measure in s ~ t u denitrification rates in the Aarhus Bight, Denmark (16 m depth). After insertion of the flux chamber into the

Seasonal patterns of sedimentary carbon and anaerobic respiration along a simulated eutrophication gradient

Anaerobic metabolism was the dominant metabolic pathway in control and treated sediments, with 50 to 70% of annual carbon remineralization due to sulfate reduction, and oxygen consumption and suifate reduction rates both increased as a result of carbon sedimentation.

Denitrification, nutrient regeneration and carbon mineralization in sediments of Galveston Bay, Texas, USA

Rates of benthic denitrification, oxygen consumption and nutrient regeneration were measured during winter, spring and summer in Galveston Bay (Texas, USA) sediments. Denitrification ranged from 0 to

Estuarine nitrogen retention independently estimated by the denitrification rate and mass balance methods: a study of Norsminde Fjord, Denmark

The present study lends no support to the widely held assumption that estuarine denitrification generally amounts to 40 to 50 % of the nitrogen input, and indicates that in addition to nitrogen input from the land, consideration must also be given to the water residence whenEstuarine nitrogen retention is being estimated.

Dynamic nature of the turnover of organic carbon, nitrogen and sulphur in the sediments of a Jamaican mangrove forest

Carbon and nitrogen mineralisation increased as the transect entered the mangrove, indicating a greater availability of organic matter, probably by root excretion, and time course measurements of sulphate reduction indicated a subsurface pool of labile carbon.

Effect of organic loading on nitrification and denitrification in a marine sediment microcosm

Total denitrification rates (estimated from nitrification and nitrate fluxes) increased with increased organic addition, because of the high concentrations of NO3− (40 μM) in the overlaying water.