Results 71 to 80 of about 2,943 (165)
Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.Abstract Dissolved organic matter (DOM) pool acts as both nutrient source and sink in the oligotrophic surface ocean. However, the drivers of seasonal variations in DOM stoichiometry and their relationship to nutrient cycling remain poorly understood.
Lusong Zhang +8 more
wiley +1 more source
Detectability of Phytoplankton Biomass Extremes Using Simulated Satellite Chlorophyll Observations
Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.Abstract Extreme open‐ocean phytoplankton events can influence marine ecosystems, yet their global occurrence, drivers, and consequences remain poorly understood. Most large‐scale studies rely on satellite chlorophyll, which provides only a surface view, is affected by physiological variability, and is often missing due to clouds and low sunlight. Here,
Genevieve L. Clow +5 more
wiley +1 more source
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
ChemBioChem, Volume 27, Issue 3, 12 February 2026.Biological N2 fixation by nitrogenase offers a sustainable alternative to the Haber–Bosch process. Heterologous nitrogenase production in Escherichia coli is a promising strategy. We engineered E. coli with nitrogen fixation (nif) operons from diazotrophic Paenibacillus species.
Yuki Honda +4 more
wiley +1 more source
Pest Management Science, Volume 82, Issue 2, Page 1842-1852, February 2026.Herbicides elicit a spectrum of responses in Nitrospirillum amazonense, ranging from the stimulation of metabolic functions (biological nitrogen fixation, IAA production) to significant growth inhibition and acute toxicity. Abstract BACKGROUND Herbicides can exert significant toxicity on nontarget organisms, including plant growth‐promoting bacteria ...
Luana Carolina Gomes Jonck +3 more
wiley +1 more source
Frontiers in Microbiology, 2016 The coral holobiont often resides in oligotrophic waters; both coral cells and their symbiotic dinoflagellates possess ammonium assimilation enzymes and potentially benefit from the nitrogen fixation of coral-associated diazotrophs. However, the seasonal
Yanying Zhang +9 more
doaj +1 more source
Global Biogeochemical Cycles, Volume 40, Issue 2, February 2026.Abstract The biological carbon pump sequesters carbon through passive fluxes of biologically derived carbon, and by active vertical movement of marine organisms. Trophic coupling between pelagic and benthic communities increases the efficiency of the biological carbon pump as less carbon is lost to remineralization.
Daniel Ottmann +6 more
wiley +1 more source
Frontiers in Microbiology, 2018 The northern Red Sea experiences strong annual differences in environmental conditions due to its relative high-latitude location for coral reefs. This allows the study of regulatory effects by key environmental parameters (i.e., temperature, inorganic ...
Arjen Tilstra +12 more
doaj +1 more source
Diazotrophic bacteria in star flowers
Bioscience Journal, 2012 This study evaluated the occurrence and density of associative diazotrophic bacteria in the rhizosphere, collar, roots and leaves of Syngonanthus elegans (Bong) Ruhland (Goldenfoot) and Syngonanthus aciphyllus (Mini-skirt). These species are able to grow in poor soils. Five samples, with 25 plants both of S. elegans and S.
Marra, Leandro Marciano +3 more
openaire +2 more sources
New Perspectives on Nitrogen Fixation Measurements Using 15N2 Gas
Frontiers in Marine Science, 2018 Recently, the method widely used to determine 15N2 fixation rates in marine and freshwater environments was found to underestimate rates because the dissolution of the added 15N2 gas bubble in seawater takes longer than theoretically calculated.
Nicola Wannicke +8 more
doaj +1 more source