Results 61 to 70 of about 468 (140)

High nitrogen fixation and Braarudosphaera presence in the North Sea

Limnology and Oceanography, Volume 71, Issue 3, March 2026.
Abstract Nitrogen fixation, the microbial conversion of dinitrogen gas to ammonia, is a key nitrogen source and critical for sustaining marine productivity. We investigated the diversity and activity of nitrogen‐fixers in surface waters of the North Sea and Norwegian coast during July 2023.
Kendra Turk‐Kubo, Claire Mahaffey, Jo Hopkins, Ruth Hawley, Louisa Norman, Lewis Wrightson, Ben Fisher, Stefanie Rynders, Clive Neil, Maryam Ilyas, Maeve C. Lohan   +10 more
wiley   +1 more source

EVIDENTIAL VALUE AND POTENTIAL USES OF NITROPLAST ORGANELLES IN UNDERWATER FORENSIC CRIME SCENE INVESTIGATIONS [PDF]

The Egyptian Journal of Forensic Sciences and Applied Toxicology
Background: Candidatus Atelocyanobacterium thalassa (UCYN-A) is a newly identified cyanobacterial symbiont with potential forensic applications, particularly in underwater investigations.
Görkem TAN
doaj   +1 more source

Surface Water Iron Deposition Histories and the Initiation of Phytoplankton Blooms in the North Pacific Subtropical Gyre

Global Biogeochemical Cycles, Volume 40, Issue 1, January 2026.
Abstract Highly productive summer phytoplankton blooms in the central North Pacific Subtropical Gyre (NPSG) are an annual occurrence that leads to the export of considerable amounts of surface particulate carbon to depth. The mechanisms that control the formation of these blooms remain unresolved, but iron (Fe) availability may be an important factor ...
Kyeong Pil Kong, Shun‐Chung Yang, Benedetto Barone, Douglas S. Hamilton, Seth G. John   +4 more
wiley   +1 more source

Spatiotemporal heterogeneity in diazotrophic communities reveals novel niche zonation on the continental shelf of the East China Sea [PDF]

Biogeosciences
The East China Sea (ECS) continental shelf is a hotspot for studying nitrogen fixation in the marginal seas of the western Pacific, where this microbially mediated process is profoundly influenced by both the coastal and oceanic current systems. Yet, how
G. Mai, H. Zhang, M. Chen, T. Shi
doaj   +1 more source

Subtropical seagrass epiphytes: Nitrogen fixation rates align with Crocosphaera‐like cyanobacteria abundances

Limnology and Oceanography, Volume 70, Issue 12, Page 3958-3971, December 2025.
Abstract Nitrogen fixers can enhance nitrogen availability for seagrass communities that may be nitrogen limited. However, the role of epiphytic diazotrophs, particularly cyanobacteria, in seagrass communities is not well understood. We measured nitrogen fixation rates, epiphyte biomass, and relative abundances of epiphytic diazotrophs on the leaves of
Lacey T. Bowman, Jane M. Caffrey, Lisa A. Waidner   +2 more
wiley   +1 more source

Biological N2 Fixation in the Upwelling Region off NW Iberia: Magnitude, Relevance, and Players

Frontiers in Marine Science, 2017
The classical paradigm about marine N2 fixation establishes that this process is mainly constrained to nitrogen-poor tropical and subtropical regions, and sustained by the colonial cyanobacterium Trichodesmium spp.
Víctor Moreira-Coello, Beatriz Mouriño-Carballido, Emilio Marañón, Ana Fernández-Carrera, Ana Fernández-Carrera, Antonio Bode, Marta M. Varela   +6 more
doaj   +1 more source

From temperate to polar waters: Transition to non‐cyanobacterial diazotrophy upon entering the Atlantic gateway of the Arctic Ocean

Limnology and Oceanography, Volume 70, Issue 10, Page 2924-2940, October 2025.
Abstract Nitrogen fixation, the microbial reduction of dinitrogen to ammonia, is increasingly recognized to occur in the Arctic Ocean. However, knowledge about the composition, biogeography, abundance, and ecology of nitrogen‐fixing organisms (diazotrophs) is poor.
Lisa W. von Friesen, Christien P. Laber, Bjarke H. Kristensen, Emma Nysted, Marcus Sundbom, Stefan Bertilsson, Pauline Snoeijs‐Leijonmalm, Hanna Farnelid, Lasse Riemann   +8 more
wiley   +1 more source

Phytoplankton community structure in the VAHINE mesocosm experiment [PDF]

Biogeosciences, 2016
The VAHINE mesocosm experiment was designed to trigger a diazotroph bloom and to follow the subsequent transfer of diazotroph-derived nitrogen (DDN) in the rest of the food web.
K. Leblanc, V. Cornet, M. Caffin, M. Rodier, A. Desnues, H. Berthelot, K. Turk-Kubo, J. Heliou   +7 more
doaj   +1 more source

Revisiting the distribution and total amount of nitrogen fixation across the Kuroshio

Limnology and Oceanography Letters, Volume 10, Issue 4, Page 495-505, August 2025.
Abstract The Kuroshio Current, a western boundary current in the North Pacific Ocean, is regarded as a hotspot of nitrogen fixation that drives marine primary productivity and biogeochemical cycles. However, this assumption is based on limited, spatiotemporally biased data.
Takuya Sato, Takuhei Shiozaki, Shota Takino, Kiyotaka Hidaka, Tamaha Yamaguchi, Daiki Ito, Daisuke Ambe, Sayaka Sogawa, Takashi Setou, Yugo Shimizu, Taketoshi Kodama, Kazutaka Takahashi   +11 more
wiley   +1 more source

Changes in diazotrophic community structure associated with Kuroshio succession in the northern South China Sea [PDF]

Biogeosciences
Kuroshio intrusion (KI) is a key process that transports water from the western Pacific Ocean to the northern South China Sea (nSCS), where KI-induced surface water mixing often causes variations in microbial assemblages.
H. Zhang, H. Zhang, G. Mai, W. Luo, M. Chen, R. Duan, R. Duan, T. Shi, T. Shi   +8 more
doaj   +1 more source