Ammonia Volatilization in a Hypertrophic Prairie Lake

1981 ◽  
Vol 38 (9) ◽  
pp. 1035-1039 ◽  
Author(s):  
T. P. Murphy ◽  
B. G. Brownlee
Keyword(s):  
Nitrogen Fixation ◽  
Nitrogen Cycle ◽  
Nitrogen Limitation ◽  
Ammonia Volatilization ◽  
Algal Bloom ◽  
Lake Surface ◽  
High Ph ◽  
Ammonia Uptake ◽  
High Ammonia ◽  
Prairie Lakes

During two periods of high pH and high ammonia concentrations, disappearance rates of ammonia of 20–30 μg N∙L−1∙h−1 were observed in Lake 885, a hypertrophic prairie lake. At these times, rates of ammonia uptake by phytoplankton were 2.6–4.3 μg N∙L−1∙h−1 as measured by a 15N method. The high excess rates of ammonia disappearance are best explained by volatilization of ammonia from the lake surface. The loss of ammonia induced nitrogen fixation; however, much larger quantities of ammonia were lost via ammonia volatilization after algal bloom collapsed than the algae could fix in one season.Key words: ammonia volatilization, prairie lakes, nitrogen limitation, nitrogen cycle

Blue-green Algal Ammonia Uptake in Hypertrophic Prairie Lakes

1981 ◽  
Vol 38 (9) ◽  
pp. 1040-1044 ◽  
Author(s):  
T. P. Murphy ◽  
B. G. Brownlee
Keyword(s):  
Microcystis Aeruginosa ◽  
Green Algae ◽  
Nitrogen Cycle ◽  
Nitrogen Limitation ◽  
Kinetic Studies ◽  
Blue Green Algae ◽  
Ammonia Uptake ◽  
Green Algal ◽  
Prairie Lakes ◽  
Menten Kinetic

Within 24 h of an increase in lake [Formula: see text] concentration, [Formula: see text] uptake by Aphanizomenon flos-aquae and Microcystis aeruginosa increases much beyond the capacity predicted by Michaelis–Menten kinetic studies. In hypertrophic lakes this response enables these blue-green algae to optimize ammonia uptake during large oscillations of [Formula: see text] concentration, to aid them in competing with other algae, and to conserve [Formula: see text] within the ecosystem. Nitrogen limitation in the hypertrophic prairie lakes is a rare event.Key words: ammonia uptake, prairie lakes, nitrogen limitation, nitrogen cycle

Comparing metal leaching and toxicity from high pH, low pH, and high ammonia fly ash

Fuel ◽  
2007 ◽  
Vol 86 (10-11) ◽  
pp. 1623-1630 ◽  
Author(s):  
Anthony V. Palumbo ◽  
Jana R. Tarver ◽  
Lisa A. Fagan ◽  
Meghan S. McNeilly ◽  
Rose Ruther ◽  
...  
Keyword(s):  
Fly Ash ◽  
Low Ph ◽  
Metal Leaching ◽  
High Ph ◽  
High Ammonia

Facile synthesis of carbon-based nanoporous adsorbent exhibiting high ammonia uptake under low pressure range

2020 ◽  
Vol 307 ◽  
pp. 110460
Author(s):  
Kanghee Cho ◽  
Hyung Chul Yoon ◽  
Hee Tae Beum ◽  
Sun Hyung Kim ◽  
Chan Hyun Lee ◽  
...  
Keyword(s):  
Pressure Range ◽  
Low Pressure ◽  
Facile Synthesis ◽  
Ammonia Uptake ◽  
High Ammonia ◽  
Carbon Based

scholarly journals Innenrücktitelbild: High Ammonia Uptake of a Metal–Organic Framework Adsorbent in a Wide Pressure Range (Angew. Chem. 50/2020)

2020 ◽  
Vol 132 (50) ◽  
pp. 22991-22991
Author(s):  
Dae Won Kim ◽  
Dong Won Kang ◽  
Minjung Kang ◽  
Jung‐Hoon Lee ◽  
Jong Hyeak Choe ◽  
...  
Keyword(s):  
Pressure Range ◽  
Metal Organic Framework ◽  
Ammonia Uptake ◽  
High Ammonia ◽  
Wide Pressure Range ◽  
Metal Organic ◽  
Wide Pressure ◽  
Organic Framework

Nitrogen Fixation and Phosphorus Turnover in a Hypertrophic Prairie Lake

1983 ◽  
Vol 40 (11) ◽  
pp. 1853-1860 ◽  
Author(s):  
B. G. Brownlee ◽  
T. P. Murphy
Keyword(s):  
Nitrogen Fixation ◽  
Light Intensity ◽  
Acetylene Reduction ◽  
Ammonia Volatilization ◽  
Molar Ratio ◽  
Short Term ◽  
Nitrogen Reduction ◽  
The Mean ◽  
Phosphorus Turnover

Nitrogen fixation by Aphanizomenon flos-aquae in a prairie lake in southwestern Manitoba was dependent on the light intensity and in situ oxygen concentrations. The mean molar ratio of acetylene reduction to nitrogen reduction was 5.8:1. High external ammonium concentrations did not appear to inhibit nitrogen fixation over the short term. Nitrogen fixation was not directly initiated by the bloom collapse. We propose that the coupled sequence of ammonia volatilization and nitrogen fixation was triggered by the bloom collapse and that the bloom collapse was caused by coprecipitation of orthophosphate with carbonates. 32PO4 turnover was most rapid during periods when the lake was opalescent, presumably due to carbonate precipitaton.

scholarly journals Box-modeling of the impacts of atmospheric nitrogen deposition and benthic remineralization on the nitrogen cycle of the eastern tropical South Pacific

2015 ◽  
Vol 12 (17) ◽  
pp. 14441-14479
Author(s):  
B. Su ◽  
M. Pahlow ◽  
A. Oschlies
Keyword(s):  
Nitrogen Fixation ◽  
Primary Production ◽  
Atmospheric Deposition ◽  
Water Column ◽  
Nitrogen Deposition ◽  
Nitrogen Cycle ◽  
South Pacific ◽  
Atmospheric Nitrogen Deposition ◽  
Atmospheric Nitrogen ◽  
Model Domain

Abstract. Both atmospheric deposition and benthic remineralization influence the marine nitrogen cycle, and hence ultimately also marine primary production. The biological and biogeochemical relations of the eastern tropical South Pacific (ETSP) to nitrogen deposition, benthic denitrification and phosphate regeneration are analysed in a prognostic box model of the oxygen, nitrogen and phosphorus cycles in the ETSP. In the model, atmospheric nitrogen deposition based on estimates for the years 2000–2009 is offset by half by reduced N2 fixation, with the other half transported out of the model domain. Both model- and data-based benthic denitrification are found to trigger nitrogen fixation, partly compensating for the NO3− loss. Since phosphate is the ultimate limiting nutrient in the model, enhanced sedimentary phosphate regeneration under suboxic conditions stimulates primary production and subsequent export production and NO3− loss in the oxygen minimum zone (OMZ). A sensitivity analysis of the local response to both atmospheric deposition and benthic remineralization indicates dominant stabilizing feedbacks in the ETSP, which tend to keep a balanced nitrogen inventory, i.e., nitrogen input by atmospheric deposition is counteracted by decreasing nitrogen fixation; NO3− loss via benthic denitrification is partly compensated by increased nitrogen fixation; enhanced nitrogen fixation stimulated by phosphate regeneration is partly removed by the stronger water-column denitrification. Even though the water column in our model domain acts as a NO3− source, the ETSP including benthic denitrification might become a NO3− sink.

Nitrogen fixation and nitrogen limitation of primary production along a natural marsh chronosequence

Oecologia ◽  
2003 ◽  
Vol 136 (3) ◽  
pp. 431-438 ◽  
Author(s):  
Anna Christina Tyler ◽  
Tracie A. Mastronicola ◽  
Karen J. McGlathery
Keyword(s):  
Nitrogen Fixation ◽  
Primary Production ◽  
Nitrogen Limitation ◽  
Natural Marsh
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