Results 11 to 20 of about 43,240 (245)
Bacterioplankton dark CO2 fixation in oligotrophic waters [PDF]
Biogeosciences, 2023 Dark CO2 fixation by bacteria is believed to be particularly important in oligotrophic ecosystems. However, only a few studies have characterized the role of bacterial dissolved inorganic carbon (DIC) fixation in global carbon dynamics.
A. Alothman +4 more
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Dark carbon fixation in stream carbon cycling
Limnology and Oceanography, 2023 AbstractHeadwater streams are often characterized by turbulence, organic matter inputs from terrestrial systems, net heterotrophy, and the microbial loop supplying carbon and energy for consumers. However, ecological models overlook dark carbon fixation (DCF), the light‐independent inorganic carbon uptake, mainly based on chemosynthesis, using energy ...
Fausto Machado‐Silva +5 more
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Ideas and perspectives: Is dark carbon fixation relevant for oceanic primary production estimates? [PDF]
Biogeosciences, 2019 About half of the global primary production (PP) is generated in the euphotic layer of the ocean. The 14C method developed by Steemann Nielsen (Nielsen, 1952) more than half a century ago has been the most frequently used method to determine PP in all ...
F. Baltar +3 more
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Contribution of Carbon Fixation Toward Carbon Sink in the Ocean Twilight Zone
Geophysical Research Letters, 2022 Dark carbon (C) fixation in the ocean twilight zone plays a crucial role toward C sink, but its potential has not been tested sufficiently in experiments.
Himanshu Saxena +7 more
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Malate Synthesis by Dark Carbon Dioxide Fixation in Leaves [PDF]
Plant Physiology, 1978 The rates of dark CO(2) fixation and the label distribution in malate following dark (14)CO(2) fixation in a C-4 plant (maize), a C-3 plant (sunflower), and two Crassulacean acid metabolism plants (Bryophyllum calycinum and Kalanchoë diagremontianum leaves and plantlets) are compared.
C, Levi, J T, Perchorowicz, M, Gibbs
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A source of isotopically light organic carbon in a low-pH anoxic marine zone
Nature Communications, 2021 Anoxic marine zones are expanding and intensifying with climate change. Here the authors show that microbial dark carbon fixation influences the carbonate system and the stable isotope composition in waters off Chile, contributing up to 35% of the ...
Cristian A. Vargas +11 more
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Dark Diazotrophy during the Late Summer in Surface Waters of Chile Bay, West Antarctic Peninsula
Microorganisms, 2022 Although crucial for the addition of new nitrogen in marine ecosystems, dinitrogen (N2) fixation remains an understudied process, especially under dark conditions and in polar coastal areas, such as the West Antarctic Peninsula (WAP). New measurements of
María E. Alcamán-Arias +10 more
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Microbial dark carbon fixation fueled by nitrate enrichment [PDF]
, 2021 Abstract Anthropogenic nitrate amendment to coastal marine sediments can increase rates of heterotrophic mineralization and autotrophic dark carbon fixation (DCF). DCF may be favored in sediments where organic matter is biologically unavailable, leading to a microbial community supported by chemoautotrophy.
Joseph H. Vineis +2 more
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Temperature sensitivity of dark CO2 fixation in temperate forest soils [PDF]
Biogeosciences, 2022 Globally, soil temperature to 1 m depth is predicted to be up to 4 ∘C warmer by the end of this century, with pronounced effects expected in temperate forest regions.
R. Akinyede +6 more
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Chemoautotrophic carbon fixation rates and active bacterial communities in intertidal marine sediments. [PDF]
PLoS ONE, 2014 Chemoautotrophy has been little studied in typical coastal marine sediments, but may be an important component of carbon recycling as intense anaerobic mineralization processes in these sediments lead to accumulation of high amounts of reduced compounds,
Henricus T S Boschker +4 more
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