Long term decline of the planktonic biomass in a hotspot of nitrogen fixation [PDF]
Nature CommunicationsOceanic N2 fixation by diazotrophic microorganisms is the primary external source of new nitrogen to the surface ocean sustaining net production of organic matter.
Alain Fumenia +9 more
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Temperate southern Australian coastal waters are characterised by surprisingly high rates of nitrogen fixation and diversity of diazotrophs [PDF]
PeerJ, 2021 Biological dinitrogen (N2) fixation is one mechanism by which specific microorganisms (diazotrophs) can ameliorate nitrogen (N) limitation. Historically, rates of N2 fixation were believed to be limited outside of the low nutrient tropical and ...
Lauren F. Messer +4 more
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Nitrogen fixation: A poorly understood process along the freshwater‐marine continuum
Limnology and Oceanography Letters, 2022 N2 fixation is a major component of the global N cycle and has been extensively studied in open‐ocean and terrestrial ecosystems. Yet rates and ecological dynamics remain virtually unknown for the inland and coastal aquatic ecosystems (lakes, wetlands ...
Amy M. Marcarelli +2 more
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Direct biological fixation provides a freshwater sink for N2O
Nature Communications, 2023 Nitrous oxide (N2O) is a potent climate gas, with its strong warming potential and ozone-depleting properties both focusing research on N2O sources. Although a sink for N2O through biological fixation has been observed in the Pacific, the regulation of ...
Yueyue Si +5 more
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Critical Role of Light in the Growth and Activity of the Marine N2-Fixing UCYN-A Symbiosis
Frontiers in Microbiology, 2021 The unicellular N2-fixing cyanobacteria UCYN-A live in symbiosis with haptophytes in the Braarudosphaera bigelowii lineage. Maintaining N2-fixing symbioses between two unicellular partners requires tight coordination of multiple biological processes ...
Marine Landa +4 more
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Diazotrophy in alluvial meadows of subarctic river systems. [PDF]
PLoS ONE, 2013 There is currently limited understanding of the contribution of biological N2 fixation (diazotrophy) to the N budget of large river systems. This natural source of N in boreal river systems may partially explain the sustained productivity of river ...
Thomas H DeLuca +4 more
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Light-limited growth rate modulates nitrate inhibition of dinitrogen fixation in the marine unicellular cyanobacterium Crocosphaera watsonii. [PDF]
PLoS ONE, 2014 Biological N2 fixation is the dominant supply of new nitrogen (N) to the oceans, but is often inhibited in the presence of fixed N sources such as nitrate (NO3-).
Nathan S Garcia, David A Hutchins
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Viability of liquid medium-inoculation of Rhizobium etli in planting furrows with common bean [PDF]
Pesquisa Agropecuária Brasileira, 2018 : The objective of this work was to evaluate the viability of liquid medium inoculation of Rhizobium etli in the planting furrow and to certify the efficiency of its strain UFLA 02-100 as a potential inoculant for common bean (Phaseolus vulgaris).
Dâmiany Pádua Oliveira +8 more
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Frontiers in Marine Science, 2022 Oxygen minimum zones (OMZs) have been suggested as a suitable niche for the oxygen-sensitive process of biological fixation of dinitrogen (N2) gas. However, most N2 fixation rates reported from such waters are low.
Christian Furbo Reeder +7 more
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Dinitrogen fixation in aphotic oxygenated marine environments
Frontiers in Microbiology, 2013 We measured N2 fixation rates from oceanic zones that have traditionally been ignored as sources of biological N2 fixation; the aphotic, fully oxygenated, nitrate (NO3-)-rich, waters of the oligotrophic Levantine Basin (LB) and the Gulf of Aqaba (GA). N2
Eyal eRahav +7 more
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