搜索结果: 1-15 共查到“海洋科学 denitrification”相关记录19条 . 查询时间(0.086 秒)
Denitrification alternates between a source and sink of nitrous oxide in the hypolimnion of a thermally stratified reservoir
Denitrification alternates sink of nitrous oxide
2014/4/2
Nitrogen loading from developed watersheds to aquatic ecosystems can stimulate microbial denitrification, a
process that reduces nitrate (NO{
3
) to dinitrogen (N2) or nitrous oxide (N2O), the latt...
Mats of the nonnative macroalga, Gracilaria vermiculophylla, alter net denitrification rates and nutrient fluxes on intertidal mudflats
nonnative macroalga Gracilaria vermiculophylla
2014/4/2
We hypothesized that mats of a nonnative macroalga, Gracilaria vermiculophylla, which is often found
incorporated several centimeters into intertidal mudflat sediments, would increase net denitrifica...
Anammox and denitrification in the oxygen minimum zone of the eastern South Pacific
Anammox and denitrification oxygen minimum zone eastern South Pacific
2014/4/4
We quantified the removal of fixed nitrogen as N2 production by anammox and N2 and N2O production by denitrification over a distance of 1900 km along the coasts of Chile and Peru, using short-term inc...
Quantifying denitrification in rippled permeable sands through combined flume experiments and modeling
Quantifying denitrification rippled permeable sands combined flume experiments modeling
2014/4/4
We measured denitrification in permeable sediments in a sealed flume tank with environmentally representative fluid flow and solute transport behavior using novel measurements. Numerical flow and reac...
Anammox and denitrification in the oxygen minimum zone of the eastern South Pacific
Anammox denitrification the oxygen minimum zone the eastern South Pacific
2014/4/3
We quantified the removal of fixed nitrogen as N2production by anammox and N2and N2O production by denitrification over a distance of 1900 km along the coasts of Chile and Peru, using short-term incub...
Differences in benthic metabolism, nutrient fluxes, and denitrification in Caulerpa taxifolia communities compared to uninvaded bare sediment and seagrass (Zostera capricorni) habitats
Differences in benthic metabolism nutrient fluxes denitrification in Caulerpa taxifolia communities uninvaded bare sediment and seagrass Zostera capricorni habitats
2014/4/4
Benthic metabolism, nutrient fluxes, and denitrification were measured in Caulerpa taxifolia communities that had recently invaded (between 2003 and 2008) bare sediments following the loss of Zostera ...
Production of nitrogen gas via anammox and denitrification in intact sediment cores along a continental shelf to slope transect in the North Atlantic
Production of nitrogen gas anammox denitrification intact sediment cores a continental shelf slope transect the North Atlantic
2014/4/17
We measured the production of N2 gas from anammox and denitrification simultaneously in intact sediment cores at six sites along a transect of the continental shelf (50 m) and deeper slope (2000 m) in...
The effect of increased nitrate loading on nitrate reduction via denitrification and DNRA in salt marsh sediments
increased nitrate nitrate reduction via
2014/4/16
The effects of increased nitrogen loading on denitrification and dissimilatory nitrate reduction to ammonium
(DNRA) in marsh sediments were studied in permanently submerged subtidal creek sediments a...
Denitrification in shallow, sublittoral Gulf of Mexico permeable sediments
Denitrification in shallow sublittoral Gulf Mexico permeable sediments
2014/4/16
We examined nitrogen cycling over a 1-yr period in shallow, sandy sediments at two contrasting sites near a barrier island in the northeastern Gulf of Mexico, and we provide here the direct determinat...
Denitrification and nitrous oxide cycling within the upper oxycline of the eastern tropical South Pacific oxygen minimum zone
Denitrification nitrous oxide cycling
2014/4/17
One of the shallowest, most intense oxygen minimum zones (OMZs) is found in the eastern tropical South
Pacific, off northern Chile and southern Peru. It has a strong oxygen gradient (upper oxycline) ...
Assimilatory uptake rather than nitrification and denitrification determines nitrogen removal patterns in streams of varying land use
Assimilatory uptake nitrification denitrification deter nitrogen removal patterns in streams of varying land use
2014/4/18
Agricultural and urban land use increase nitrogen (N) concentrations in streams, which can saturate biotic demand by plants, algae, and bacteria via assimilative uptake, and by nitrification and denit...
Rates and regulation of anaerobic ammonium oxidation and denitrification in the Black Sea
Rates and regulation anaerobic ammonium oxidation denitrification Black Sea
2014/4/18
We performed incubation experiments with 15N-labeled nitrogen compounds to investigate the vertical distribution of pathways of N2 production through the suboxic zone of the central Black Sea and the ...
Shift from denitrification to anammox after inflow events in the central Baltic Sea
denitrification anammox after inflow events central Baltic Sea
2014/4/22
Incubation experiments with 15N-labeled compounds (NO3- and NH4+) were performed during three cruises (2002, 2004, and 2005) to study the loss of inorganic N as dinitrogen gas (N2) via denitrification...
Benthic nitrogen fluxes along a depth gradient in a microtidal fjord: The role of denitrification and microphytobenthos
Benthic nitrogen fluxes depth gradient microtidal fjord denitrification microphytobenthos
2014/5/19
In littoral sediments, microphytobenthic (MPB) nitrogen assimilation often exceeds nitrogen removal by denitrification, partly because MPB activity suppresses denitrification. Little is known about th...
Reach-scale isotope tracer experiment to quantify denitrification and related processes in a nitrate-rich stream, midcontinent United States
Reach-scale isotope tracer experiment quantify denitrification related processes nitrate-rich stream midcontinent United States
2014/5/14
We conducted an in-stream tracer experiment with Br and 15N-enriched NO3- to determine the rates of denitrification and related processes in a gaining NO3- -rich stream in an agricultural watershed in...