Results 31 to 40 of about 468 (140)

Seasonal Shifts in Diazotrophs Players: Patterns Observed Over a Two-Year Time Series in the New Caledonian Lagoon (Western Tropical South Pacific Ocean)

Frontiers in Marine Science, 2020
Coastal and open ocean regions of the Western Tropical South Pacific ocean have been identified as a hotspot of N2 fixation. However, the environmental factors driving the temporal variability of abundance, composition, and activity of diazotrophs are ...
Emmrick Saulia, Emmrick Saulia, Mar Benavides, Britt Henke, Kendra Turk-Kubo, Haley Cooperguard, Olivier Grosso, Anne Desnues, Martine Rodier, Martine Rodier, Cécile Dupouy, Cécile Dupouy, Lasse Riemann, Sophie Bonnet, Sophie Bonnet   +14 more
doaj   +1 more source

Transfer of diazotroph-derived nitrogen to the planktonic food web across gradients of N₂ fixation activity and diversity in the western tropical South Pacific Ocean [PDF]

Biogeosciences, 2018
Biological dinitrogen (N2) fixation provides the major source of new nitrogen (N) to the open ocean, contributing more than atmospheric deposition and riverine inputs to the N supply.
M. Caffin, H. Berthelot, H. Berthelot, V. Cornet-Barthaux, A. Barani, S. Bonnet, S. Bonnet   +6 more
doaj   +1 more source

Latitudinal constraints on the abundance and activity of the cyanobacterium UCYN‐A and other marine diazotrophs in the North Pacific [PDF]

Limnology and Oceanography, 2020
Abstract The number of marine environments known to harbor dinitrogen (N 2 )‐fixing (diazotrophic) microorganisms is increasing, prompting a reassessment of the biogeography of marine diazotrophs and N 2 fixation rates (NFRs). Here, we
Mary R. Gradoville, Hanna Farnelid, Angelicque E. White, Kendra A. Turk‐Kubo, Brittany Stewart, François Ribalet, Sara Ferrón, Paulina Pinedo‐Gonzalez, E. Virginia Armbrust, David M. Karl, Seth John, Jonathan P. Zehr   +11 more
openaire   +3 more sources

The Green Berry Consortia of the Sippewissett Salt Marsh: Millimeter-Sized Aggregates of Diazotrophic Unicellular Cyanobacteria

Frontiers in Microbiology, 2017
Microbial interactions driving key biogeochemical fluxes often occur within multispecies consortia that form spatially heterogeneous microenvironments.
Elizabeth G. Wilbanks, Verena Salman-Carvalho, Ulrike Jaekel, Parris T. Humphrey, Jonathan A. Eisen, Daniel H. Buckley, Stephen H. Zinder   +6 more
doaj   +1 more source

Unstable Relationship Between Braarudosphaera bigelowii (= Chrysochromulina parkeae) and Its Nitrogen-Fixing Endosymbiont

Frontiers in Plant Science, 2021
Marine phytoplankton are major primary producers, and their growth is primarily limited by nitrogen in the oligotrophic ocean environment. The haptophyte Braarudosphaera bigelowii possesses a cyanobacterial endosymbiont (UCYN-A), which plays a major role
Shigekatsu Suzuki, Masanobu Kawachi, Chinatsu Tsukakoshi, Atsushi Nakamura, Kyoko Hagino, Isao Inouye, Ken-ichiro Ishida   +6 more
doaj   +1 more source

Contribution and pathways of diazotroph-derived nitrogen to zooplankton during the VAHINE mesocosm experiment in the oligotrophic New Caledonia lagoon [PDF]

Biogeosciences, 2016
In oligotrophic tropical and subtropical oceans, where strong stratification can limit the replenishment of surface nitrate, dinitrogen (N2) fixation by diazotrophs can represent a significant source of nitrogen (N) for primary production.
B. P. V. Hunt, S. Bonnet, H. Berthelot, B. J. Conroy, R. A. Foster, M. Pagano   +5 more
doaj   +1 more source

Response of the unicellular diazotrophic cyanobacterium Crocosphaera watsonii to iron limitation. [PDF]

PLoS ONE, 2014
Iron (Fe) is widely suspected as a key controlling factor of N2 fixation due to the high Fe content of nitrogenase and photosynthetic enzymes complex, and to its low concentrations in oceanic surface seawaters.
Violaine Jacq, Céline Ridame, Stéphane L'Helguen, Fanny Kaczmar, Alain Saliot   +4 more
doaj   +1 more source

The response of diazotrophs to nutrient amendment in the South China Sea and western North Pacific [PDF]

Biogeosciences, 2022
The availability of iron (Fe) and phosphorus (P) has been shown to be a key factor regulating rates of nitrogen fixation in the western subtropical Pacific.
Z. Wen, Z. Wen, T. J. Browning, R. Dai, W. Wu, W. Li, W. Li, X. Hu, W. Lin, L. Wang, X. Liu, Z. Cao, H. Hong, D. Shi   +13 more
doaj   +1 more source

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

Dynamics of N₂ fixation and fate of diazotroph-derived nitrogen in a low-nutrient, low-chlorophyll ecosystem: results from the VAHINE mesocosm experiment (New Caledonia) [PDF]

Biogeosciences, 2016
N2 fixation rates were measured daily in large (∼ 50 m3) mesocosms deployed in the tropical southwest Pacific coastal ocean (New Caledonia) to investigate the temporal variability in N2 fixation rates in relation with environmental parameters and study ...
S. Bonnet, H. Berthelot, K. Turk-Kubo, S. Fawcett, E. Rahav, S. L'Helguen, I. Berman-Frank   +6 more
doaj   +1 more source