Results 71 to 80 of about 468 (140)
Limnology and Oceanography Letters, Volume 10, Issue 3, Page 287-297, June 2025.Abstract The major marine nitrogen‐fixing cyanobacterium, Crocosphaera watsonii, is restricted to warm tropical and subtropical oceans, while the underlying mechanisms remain unclear. C. watsonii fixes nitrogen (oxygen‐sensitive) and carbon (oxygen‐evolving) during night and day, respectively.
Lixia Deng +6 more
wiley +1 more source
Nitrogen fixation mechanisms and distribution patterns of UCYN-A in the global ocean
Abstract Biological N2 fixation is fundamental for supporting life on our planet1. UCYN-A, previously classified as unicellular cyanobacterium, shows molecular characteristics of an early-stage N2-fixing organelle, or nitroplast2, inside the haptophyte cell Braarudosphaera bigelowii and appears to be one of the most abundant3 and important4,5 ...
Subhendu Chakraborty +4 more
openaire +1 more source
Temperature‐dependent growth and activity in a globally distributed nitrogen‐fixing haptophyte
Limnology and Oceanography, Volume 70, Issue 5, Page 1499-1511, May 2025.Abstract Dinitrogen (N2)‐fixing microorganisms play a crucial role in supplying nitrogen (N) to the oceans by converting atmospheric N2 into bioavailable N. N2 fixation was thought to be limited to warm oligotrophic ocean waters, but the association between the N2‐fixing UCYN‐A cyanobacterium and specific haptophytes, including Braarudosphaera ...
Esther Wing Kwan Mak +6 more
wiley +1 more source
Mesozooplankton Graze on Cyanobacteria in the Amazon River Plume and Western Tropical North Atlantic
Frontiers in Microbiology, 2017 Diazotrophic cyanobacteria, those capable of fixing di-nitrogen (N2), are considered one of the major sources of new nitrogen (N) in the oligotrophic tropical ocean, but direct incorporation of diazotrophic N into food webs has not been fully examined ...
Brandon J. Conroy +6 more
doaj +1 more source
Water Column Structure and Nutrient Supply on the Northwest Atlantic Shelf: A Nitrate Isotope Study
Global Biogeochemical Cycles, Volume 39, Issue 3, March 2025.Abstract The Northwest Atlantic continental shelf is a highly productive marine region with major uncertainties regarding the supply mechanisms of nutrients fueling productivity. This study uses nitrate isotopes (δ15NNO3 and δ18ONO3) from the Atlantic Zone Monitoring Program 2020 fall mission and an Optimum Multiparameter Analysis to evaluate on‐shelf ...
N. Lehmann +6 more
wiley +1 more source
Unique genome evolution in an intracellular N2-fixing symbiont of a rhopalodiacean diatom
Acta Societatis Botanicorum Poloniae, 2014 Cyanobacteria, the major photosynthetic prokaryotic lineage, are also known as a major nitrogen fixer in nature. N2-fixing cyanobacteria are frequently found in symbioses with various types of eukaryotes and supply fixed nitrogen compounds to their ...
Takuro Nakayama, Yuji Inagaki
doaj +1 more source
Erratum: Unusual marine unicellular symbiosis with the nitrogen-fixing cyanobacterium UCYN-A [PDF]
Nature Microbiology, 2017 Jonathan P, Zehr +4 more
openaire +2 more sources
Frontiers in Microbiology, 2012 The Tropical North Atlantic (TNAtl) plays a critical role in the marine nitrogen cycle, as it supports high rates of biological nitrogen (N2) fixation, yet it is unclear whether this process is limited by the availability of iron (Fe), phosphate (P) or ...
Kendra A Turk-Kubo +7 more
doaj +1 more source
The diazotroph Candidatus Atelocyanobacterium thalassa (UCYN-A) is an endosymbiont of the marine alga Braarudosphaera bigelowii , currently in an evolutionary transition towards becoming an organelle specialized in nitrogen fixation, known as a "nitroplast ...
Guerra Ospino, Abraham David +2 more
openaire +1 more source
Marine nitrogen-fixers in the Canadian Arctic Gateway are dominated by biogeographically distinct noncyanobacterial communities. [PDF]
FEMS Microbiol Ecol, 2023 Robicheau BM +4 more
europepmc +1 more source