Results 71 to 80 of about 113,928,681 (157)
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 +6 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 +11 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 +7 more
doaj +1 more source
Raw ddPCR abundance of UCYN-A2 and UCYN-A1 from DY167
Abundances of B. bigelowii/UCYN-A1 and B. bigelowii//UCYN-A2/A3/A4 were estimated from 11 surface water filtered seawater samples (< 3m, Sterivex 0.22 µm)using digital droplet PCR (ddPCR) using the assays originally developed for Taqman® quantitative PCR
Mahaffey, Claire, Turk-Kubo, Kendra
core +1 more source
, 2023 The multiple symbiotic partnerships between closely related species of the haptophyte algae Braarudosphaera bigelowii and the nitrogen-fixing cyanobacteria Candidatus Atelocyanobacterium thalassa (UCYN-A) contribute importantly to the nitrogen and carbon
Kendra A. Turk-Kubo (8735352) +4 more
core +1 more source
In-depth characterization of diazotroph activity across the western tropical South Pacific hotspot of N2 fixation (OUTPACE cruise) [PDF]
Biogeosciences, 2018 Here we report N2 fixation rates from a ∼ 4000 km transect in the western and central tropical South Pacific, a particularly undersampled region in the world ocean.
S. Bonnet +11 more
doaj +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
Changes in diazotrophic community structure associated with Kuroshio succession in the northern South China Sea [PDF]
BiogeosciencesKuroshio 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 +8 more
doaj +1 more source
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
Gradients 3 KM1906 UCYN-A2&A3 nifH Gene Abundances
, 2023 <p>This dataset is a quantification of the UCYN-A2&A3 nifH gene using digital droplet Polymerase Chain Reaction (ddPCR). Samples were collected during the April 2019 KM1906/Gradients 3 cruise that traveled from Hawaii to the North Pacific and ...
Simons CMAP, Zehr Lab
core +1 more source