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Anaerobic ammonium oxidation (anammox) bacteria and sulfide-dependent denitrifiers coexist in the water column of a meromictic south-alpine lake
Anaerobic ammonium oxidation bacteria sulfide-dependent denitrifiers coexist in the water column a meromictic south-alpine lake
2014/4/2
In addition to organotrophic denitrification, alternative pathways, such as anaerobic ammonium oxidation(anammox) or sulfide-dependent denitrification may be important modes for the removal of fixed n...
Ammonium uptake and dinitrogen fixation by the unicellular nanocyanobacterium Crocosphaera watsonii in nitrogen-limited continuous cultures
nanocyanobacterium Crocosphaera Ammonium uptake
2014/4/2
Ammonium uptake and nitrogen (N) fixation of the unicellular nanocyanobacterium Crocosphaera watsonii
isolated from the western subtropical North Pacific were determined in N-limited continuous cultu...
Molecular evidence for anaerobic ammonium–oxidizing (anammox) bacteria in continental shelf and slope sediments off northwest Africa
Molecular evidence anaerobic ammonium–oxidizing bacteria in continental shelf slope sediments off northwest Africa
2014/4/16
The presence and abundance of anaerobic ammonium–oxidizing (anammox) bacteria was investigated in continental shelf and slope sediments (300–3000 m water depth) off northwest Africa in a combined appr...
Ammonium regeneration and nitrification rates in the oligotrophic Atlantic Ocean: Implications for new production estimates
Ammonium regeneration nitrification rates the oligotrophic Atlantic Ocean new production estimates
2014/4/21
N regeneration was measured on a transect of the North and South Atlantic, from the United Kingdom to the Falkland Islands, that included extreme oligotrophic conditions. NH4+ and NO{2 oxidation rates...
Interaction between hydrodynamics and seagrass canopy structure: Spatially explicit effects on ammonium uptake rates
hydrodynamics seagrass canopy structure Spatially explicit effects ammonium uptake rates
2014/4/18
The hypotheses that (1) different seagrass morphologies may facilitate different nutrient uptake rates under similar hydrodynamic forcing and (2) this effect on nutrient uptake rates is spatially expl...
Ammonium regeneration and nitrification rates in the oligotrophic Atlantic Ocean: Implications for new production estimates
Ammonium regeneration nitrification rates oligotrophic Atlantic Ocean Implications for new production estimates
2014/4/18
N regeneration was measured on a transect of the North and South Atlantic, from the United Kingdom to the Falkland Islands, that included extreme oligotrophic conditions. NH4+ and NO{2 oxidation rates...
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 ...
Anaerobic ammonium oxidation in the Peruvian oxygen minimum zone
Anaerobic ammonium oxidation Peruvian oxygen minimum zone
2014/4/22
We investigated the microbial pathways of nitrogen (N) loss in an April 2005 transect through the Peruvian oxygen minimum zone (OMZ) at 12°S latitude using short anaerobic incubations with 15N-labeled...
Ammonium uptake and growth limitation in marine phytoplankton
Ammonium uptake growth limitation marine phytoplankton
2014/4/21
We used continuous culture techniques and a sensitive fluorescence method to quantify relationships among ammonium (NH4+) concentration, cellular NH4+ uptake rates, and growth rate limitation for five...
Uptake of ammonium by the scleractinian coral Stylophora pistillata: Effect of feeding, light, and ammonium concentrations
Uptake of ammonium scleractinian coral Stylophora pistillata Effect of feeding, light ammonium concentrations
2014/5/27
Experiments were designed to assess the uptake rates of 0.2, 1, and 5 μM ammonium by the scleractinian coral Stylophora pistillata maintained under different feeding regimes (highly fed, slightly fed,...
Ammonium uptake by seagrass epiphytes: Isolation of the effects of water velocity using an isotope label
Ammonium uptake seagrass epiphytes water velocity isotope label
2014/5/27
In a series of flume experiments, 15N-labeled ammonium was used to isolate the effects of water velocity on ammonium uptake by epiphytes from that of an assemblage of organisms that included seagrass ...
The influence of ammonium, nitrate, and dissolved oxygen concentrations on uptake, nitrification, and denitrification rates associated with prairie stream substrata
ammonium nitrate dissolved oxygen concentrations uptake nitrification denitrification rates prairie stream substrata
2014/5/26
Substrata samples were collected from Kings Creek on Konza Prairie Biological Station (Manhattan, Kansas) and incubated with varying levels of ammonium (NH4+), nitrate (NO3-), and dissolved oxygen (O2...
Influence of stream size on ammonium and suspended particulate nitrogen processing
Influence of stream sizeon ammonium suspended particulate nitrogen processing
2014/5/30
We used 15NH4 tracer additions to determine travel distances of ammonium (NH4 ) and suspended particulate organic nitrogen (SPON) in six streams ranging from second to fifth order located within a sin...
Ammonium excretion by Antarctic krill Euphausia superba at South Georgia
Ammonium excretion Antarctic krill Euphausia superba South Georgia
2014/6/17
Excretion by Antarctic krill Euphausia superba (hereafter ‘‘krill’’) is measured typically in small containers of filtered seawater for 12-24 h, which may cause a reduction of swim...