The marine nitrogen cycle
The Marine Nitrogen Cycle: Overview and Challenges
... the marine nitrogen cycle occupies a central role within the biogeo- chemical cycles of the sea, we have just barely begun to understand its major processes and the factors that regulate ...global ...
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Interactions of marine nitrogen cycle microorganisms
... Boran, I really appreciate all your advice during our informal discussions and your great help in the lab. Wim and Katinka, thanks a lot for your help with the anammox bioreactors. Further, I would like to thank Wouter, ...
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Overlooked runaway feedback in the marine nitrogen cycle: the vicious cycle
... linking nitrogen fixation and denitrification, which act on timescales much shorter than the several thousand years needed for a global biogeochemistry-circulation model to reach equilib- rium, we start from ...
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The role of air-sea exchange in the marine nitrogen cycle
... as marine nitrogen fixation, so it is logical to ask what effect this input has on the marine ...high nitrogen loadings in general including atmospheric ...of nitrogen alone since ...
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The Eastern Oyster Microbiome and its Implications in the Marine Nitrogen Cycle
... fluctuation of oyster microbiomes in response to seasonal changes or alterations to oyster microbiome function in the environment. An important ecosystem function provided by oyster microbiomes in marine ...
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Regional and global scale modeling of the benthic marine nitrogen cycle
... The aim of this study is to investigate N cycling in the Peruvian OMZ sediments along 11 ◦ S and identify the major benthic N turnover processes under the changing redox conditions. We used a reaction-transport model ...
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Impacts and Importance of Ammonia- and Nitrite Oxidation in the Marine Nitrogen Cycle
... Destructionofparticlesduringsamplingproceduresmightnegativelyaffectrates,especiallythose processes restricted to oxygen reduced microniches such as e.g. nitrate reduction to nitrite. 15 N ...
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Ammonium availability in the Late Archaean nitrogen cycle
... of nitrogen oxyanions in the Late ...anaerobic marine nitrogen cycle, where ammonium-replete ferruginous waters underlay an ephemeral oxygen ...ample nitrogen to fuel a prolific Late ...
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A denitrifying community associated with a major, marine nitrogen-fixer
... the marine nitrogen cycle and contributes significant amounts of new nitrogen to oligotrophic, tropical/subtropical ocean surface ...including marine invertebrates, microeu- karyotes ...
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Using Molecular Tools to Elucidate Controls on Microbes Driving the Nitrogen Cycle in Marine Sediments
... 92 unvegetated coastal sediments have also been recognized as a periodic source of fixed N (Gardner et al. 2006; Fulweiler et al. 2007; Bertics et al. 2010). Biological N fixation is catalyzed by the nitrogenase enzyme, ...
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The Marine Cyanate Cycle
... For all anoxic incubations, ambient concentrations of urea, NH 4 + , and OCN - were below the limit of detection, and substrate additions ranged from 105 to 145 nM N consequently, rate estimates should be considered ...
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Marine oxygen production and open water supported an active nitrogen cycle during the Marinoan Snowball Earth
... or marine biological productivity during the ...and nitrogen isotope data from a Neoproterozoic (Marinoan) glacial ...sedimentary nitrogen is isotopically heavier than the modern atmosphere, ...
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The metagenome of the marine anammox bacterium 'Candidatus Scalindua profunda' illustrates the versatility of this globally important nitrogen cycle bacterium
... fixed nitrogen from the oceans, making them impor- tant players in the global nitrogen ...date, marine anammox bacteria found in marine water columns and sediments worldwide belong almost ...
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Investigations on the nitrogen cycle in the coastal North Sea
... 113 Discussion Comparison of different anammox markers Some differences were detected between anammox bacterial abundance and activity markers, which became apparent when they were correlated with each other using ...
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Nitrogen Transport and Utilization of Marine Algae for Bioenergy Production.
... under nitrogen starvation (no nitrogen and ...a nitrogen starvation response rather than a modified metabolic state, suggesting degradation of glutamine was too slow to demonstrate the ...
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Seasonal and interannual variations in the nitrogen cycle in the Arabian Sea
... On an interannual timescale, a stronger SW monsoon en- hanced denitrification rates by increasing organic carbon ex- port production. The associated enhanced NO − 3 losses could be compensated for by the increased inflow ...
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Water Carbon And Nitrogen Cycle Worksheet Color Sheet
... carbon cycle with far-reaching ...and nitrogen important in an increase warming ...or nitrogen cycles amoeba sisters ...carbon cycle by burning fossil fuels and clearing ...Life Cycle ...
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Mechanistic Model for the Coexistence of Nitrogen Fixation and Photosynthesis in Marine Trichodesmium
... major nitrogen-fixing cyanobacterium and exerts a significant influence on the oceanic nitrogen ...the nitrogen-fixing enzyme nitrogenase is ex- tremely sensitive to oxygen, how these surface-dwelling ...
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Onset of the aerobic nitrogen cycle during the Great Oxidation Event
... . Nitrogen isotope values vary from ...Paleoproterozoic marine shelf, uptake of ammonium from anoxic deep waters would have produced 15 N-depleted biomass just below the ...available marine oxidants ...
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Microbial nitrogen cycle interactions in laboratory-scale model systems
... Summary Hydrothermally active sediments are highly productive, chemosynthetic areas which are characterized by the rapid turnover of particulate organic matter under extreme conditions in which ammonia is liberated. ...
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