Nitrogen Cycle
Onset of the aerobic nitrogen cycle during the Great Oxidation Event
... modern nitrogen cycle, as marine nitrate was not pervasive in the oceans before the GOE 16,17 ...aerobic nitrogen cycling became at least locally widespread enough to impart a long-lived isotopic ...
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The evolution of Earth’s biogeochemical nitrogen cycle
... abundant nitrogen data from the preceding Neoarchean and the following Mesoproterozoic, data from the Paleoproterozoic are rather ...interesting nitrogen isotope record of all as major changes in the ...
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Ammonium availability in the Late Archaean nitrogen cycle
... of nitrogen oxyanions in the Late ...marine nitrogen cycle, where ammonium-replete ferruginous waters underlay an ephemeral oxygen ...ample nitrogen to fuel a prolific Late Archean ...
23
Modelling of water balance and nitrogen cycle in vegetative filter strips
... The COUP model was applied both to the field and to vegetative filter strips to model water balance and nitrogen dynamics. Modelling was based on measured surface runoff, soil moisture, and physical and chemical ...
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Marine oxygen production and open water supported an active nitrogen cycle during the Marinoan Snowball Earth
... Our data from the Marinoan glaciation present a very different picture of the palaeoenvironment during low-latitude glaciation than the canonical “hard Snowball Earth” model. There is evidence of an active biosphere with ...
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Stability of the nitrogen cycle during development of sulfidic water in the redox-stratified late Paleoproterozoic Ocean
... This is a repository copy of Stability of the nitrogen cycle during development of sulfidic water in the redox-stratified late Paleoproterozoic Ocean.. White Rose Research Online URL for[r] ...
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Implementing the nitrogen cycle into the dynamic global vegetation, hydrology, and crop growth model LPJmL (version 5.0)
... terrestrial nitrogen cycle to account for nutrient limita- ...soil nitrogen dynamics, plant uptake, nitrogen allocation, response of photosynthesis and maintenance respiration to varying ...
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The nitrogen cycle in the sea
... The metabolism has been discussed of the following sources of nitrogen available to plants in sea water: mono-, di- and trimethylamine, trimethylamine oxide, urea, amino-acids, ammonia, [r] ...
22
Strong correspondence between nitrogen isotope composition of foliage and chlorin across a rainfall gradient: implications for paleo reconstruction of the nitrogen cycle
... Samples were handled under very limited light conditions to minimize photodegradation. Pigments were extracted by sonication in triplicate using ∼ 100 mL of acetone (300 mL total) for 1 to 80 g of subsamples. Extracts ...
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The nitrogen cycle in the Broadbalk Wheat Experiment : recovery and losses of 15N-labelled fertilizer applied in spring and inputs of nitrogen from the atmosphere
... Very little labelled inorganic N was present in soil at harvest and, of the total labelled N present in soil, stubble and chaff at the 1980 harvest, 78-90% was still in the soil at the 1[r] ...
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Studies of nitrous oxide and the nitrogen cycle in a temperate river estuarine system
... a nitrogen filled glove bag, containing Anaerocult-A (Merck) sachets, which were used to remove any residual ...under nitrogen and centrifuged for 30 minutes at 3000 rpm in a refrigerated centrifuge at ...
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Detecting Nitrous Oxide Reductase (nosZ) Genes in Soil Metagenomes: Method Development and Implications for the Nitrogen Cycle
... The objective of the present study was to analyze the diversity and abundance of both typical and atypical nosZ genes in soils with contrasting physicochemical properties. To this end, we first developed a strategy based ...
8
Abiotic ammonium formation in the presence of Ni-Fe metals and alloys and its implications for the Hadean nitrogen cycle
... used in this investigation were more reactive than alloys toward all investigated nitrogen species. Nitrite and nitrate were converted to ammonium more rapidly than dinitrogen, and the reduction process had a ...
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Nitrogen cycle of effluent-irrigated energy crop plantations:from wastewater treatment to thermo-chemical conversion processes
... This paper reviews nitrogen (N) cycle of effluent-irrigated energy crop plantations, starting from wastewater treatment to thermo-chemical conversion processes. In wastewater, N compounds contribute to ...
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The abundance of nitrogen cycle genes and potential greenhouse gas fluxes depends on land use type and little on soil aggregate size
... Ηιγηλιγητσ: 1 Λανδ υσε ισ τηε mαιν φαχτορ εξπλαινινγ Ν χψχλε γενεσ αβυνδανχε ανδ ΓΗΓ φλυξεσ 2 Σοιλ αγγρεγατεσ σιζε ισ α mινορ φαχτορ εξπλαινινγ Ν γενεσ αβυνδανχε ανδ ΓΗΓ φλυξεσ 3 Χροπλαν[r] ...
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Accelerating the spin-up of the coupled carbon and nitrogen cycle model in CLM4
... Abstract. The commonly adopted biogeochemistry spin-up process in an Earth system model (ESM) is to run the model for hundreds to thousands of years subject to periodic atmo- spheric forcing to reach dynamic steady state ...
9
Biome-scale nitrogen fixation strategies selected by climatic constraints on nitrogen cycle
... White Rose Research Online URL for this paper: http://eprints.whiterose.ac.uk/92927/ Version: Accepted Version Article: Sheffer, E, Batterman, SA, Levin, SA et al.. 1 more author 2015 Bi[r] ...
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A petrological assessment of diamond as a recorder of the mantle nitrogen cycle
... aspects of the mantle C-N cycle, especially when considering carbon and nitrogen stable isotope data.. further investigations into the speciation, partitioning, and equilibrium stable-is[r] ...
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The relationship between mantle pH and the deep nitrogen cycle
... Calculation of the thermodynamic and transport properties of aqueous species at high pressures and temperatures: Revised equations of state for the standard partial molal properties of i[r] ...
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Nitrogen recycling or nitrogen conservation in an alga invertebrate symbiosis?
... the nitrogen conservation hypothesis, the protein amino acids contribute 42 % and 50 %, respectively, of the total free amino acid pool in control animals and in alga-depleted animals incubated with an exogenous ...
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