Results 21 to 30 of about 113,928,681 (157)

Sediments as Potential Sources of Non-Cyanobacterial Diazotrophs in Arctic Sea Ice and Seawater. [PDF]

Environ Microbiol Rep
Diazotrophic communities across Arctic environments: Integrated analyses of diazotrophs in sea ice, seawater, and sediments show that Arctic continental shelf sediments function as a central reservoir, supplying diazotrophs to both sea ice and seawater through resuspension processes.
Bo H, Zhang Z, Fujiwara A, Fukai Y, Ito M, Kimura S, Oggier M, Waga H, Whitmore L, Hamasaki K, Shiozaki T.   +10 more
europepmc   +2 more sources

Adaptive Responses of Cyanobacteria to Phosphate Limitation: A Focus on Marine Diazotrophs. [PDF]

Environ Microbiol
Marine diazotrophic cyanobacteria, which are essential for atmospheric nitrogen fixation in low‐nutrient oceans, have developed various strategies to survive under phosphate (Pi) limitation by using high‐affinity transporters and enzymes that break down dissolved organic phosphorus (DOP).
Caille C, Duhamel S, Latifi A, Rabouille S.   +3 more
europepmc   +2 more sources

Unveiling Crocosphaera Responses to Phosphorus Depletion: Insights From Genome Analysis and Functional Characterization. [PDF]

Environ Microbiol
Genomic analysis, diel gene expression profiling, and physiological monitoring were combined to uncover how the unicellular cyanobacteria Crocosphaera thrive in low‐phosphate environments. Our results indicate that the strategic use of dissolved organic phosphorus (DOP) is central to its adaptation, providing new insights into microbial resilience in ...
Caille C, Rabouille S, Ortega-Retuerta E, Denis Y, Crispi O, Marie B, Pujo-Pay M, Daric V, Talla E, Latifi A.   +9 more
europepmc   +2 more sources

Eddy-driven diazotroph distribution in the subtropical North Atlantic: horizontal variability prevails over particle sinking speed [PDF]

Communications Biology
Mesoscale eddies influence the distribution of diazotrophic (nitrogen-fixing) cyanobacteria, impacting marine productivity and carbon export. Non-cyanobacterial diazotrophs (NCDs) are emerging as potential contributors to marine nitrogen fixation ...
E. Cerdán-García, X. A. Álvarez-Salgado, J. Arístegui, A. Martínez-Marrero, M. Benavides   +4 more
doaj   +2 more sources

N₂ fixation in the Mediterranean Sea related to the composition of the diazotrophic community and impact of dust under present and future environmental conditions [PDF]

Biogeosciences, 2022
N2 fixation rates were measured in the 0–1000 m layer at 13 stations located in the open western and central Mediterranean Sea (MS) during the PEACETIME cruise (late spring 2017).
C. Ridame, J. Dinasquet, J. Dinasquet, S. Hallstrøm, E. Bigeard, L. Riemann, F. Van Wambeke, M. Bressac, E. Pulido-Villena, V. Taillandier, F. Gazeau, A. Tovar-Sanchez, A.-C. Baudoux, C. Guieu   +13 more
doaj   +1 more source

High biomass turnover rates of endosymbiotic nitrogen‐fixing cyanobacteria in the western Bering Sea

Limnology and Oceanography Letters, 2022
Recent studies have described active nitrogen fixation in high‐latitude waters, but the ecological controls on the occurrence or activity of nitrogen‐fixing organisms (diazotrophs) in such systems remain unknown.
Shunyan Cheung, Kailin Liu, Kendra A. Turk‐Kubo, Jun Nishioka, Koji Suzuki, Michael R. Landry, Jonathan P. Zehr, Szeki Leung, Lixia Deng, Hongbin Liu   +9 more
doaj   +1 more source

Seasonal and spatial patterns in diazotroph community composition at Station ALOHA

Frontiers in Marine Science, 2023
Dinitrogen (N2) fixation is carried out by specialized microbes, called diazotrophs, and is a major source of nitrogen supporting primary production in oligotrophic oceans.
Kendra A. Turk-Kubo, Britt A. Henke, Mary R. Gradoville, Jonathan D. Magasin, Matthew J. Church, Jonathan P. Zehr   +5 more
doaj   +1 more source

Distribution and drivers of symbiotic and free-living diazotrophic cyanobacteria in the western tropical South Pacific [PDF]

Biogeosciences, 2018
The abundance and distribution of cyanobacterial diazotrophs were quantified in two regions (Melanesian archipelago, MA; and subtropical gyre, SG) of the western tropical South Pacific using nifH quantitative polymerase chain reaction (qPCR) assays ...
M. Stenegren, A. Caputo, C. Berg, S. Bonnet, S. Bonnet, R. A. Foster   +5 more
doaj   +1 more source

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, Mark V. Brown, Paul D. Van Ruth, Mark Doubell, Justin R. Seymour   +4 more
doaj   +2 more sources

Elucidation of trophic interactions in an unusual single-cell nitrogen-fixing symbiosis using metabolic modeling.

PLoS Computational Biology, 2021
Marine nitrogen-fixing microorganisms are an important source of fixed nitrogen in oceanic ecosystems. The colonial cyanobacterium Trichodesmium and diatom symbionts were thought to be the primary contributors to oceanic N2 fixation until the discovery ...
Debolina Sarkar, Marine Landa, Anindita Bandyopadhyay, Himadri B Pakrasi, Jonathan P Zehr, Costas D Maranas   +5 more
doaj   +1 more source