Results 11 to 20 of about 47,873 (213)

Genomics and Ecophysiology of Heterotrophic Nitrogen-Fixing Bacteria Isolated from Estuarine Surface Water

mBio, 2015
The ability to reduce atmospheric nitrogen (N2) to ammonia, known as N2 fixation, is a widely distributed trait among prokaryotes that accounts for an essential input of new N to a multitude of environments.
Mikkel Bentzon-Tilia, Ina Severin, Lars H. Hansen, Lasse Riemann   +3 more
doaj   +1 more source

Molecular evidence for sediment nitrogen fixation in a temperate New England estuary [PDF]

PeerJ, 2016
Primary production in coastal waters is generally nitrogen (N) limited with denitrification outpacing nitrogen fixation (N2-fixation). However, recent work suggests that we have potentially underestimated the importance of heterotrophic sediment N2 ...
Silvia E. Newell, Kaitlyn R. Pritchard, Sarah Q. Foster, Robinson W. Fulweiler   +3 more
doaj   +2 more sources

Direct biological fixation provides a freshwater sink for N2O

Nature Communications, 2023
Nitrous oxide (N2O) is a potent climate gas, with its strong warming potential and ozone-depleting properties both focusing research on N2O sources. Although a sink for N2O through biological fixation has been observed in the Pacific, the regulation of ...
Yueyue Si, Yizhu Zhu, Ian Sanders, Dorothee B. Kinkel, Kevin J. Purdy, Mark Trimmer   +5 more
doaj   +1 more source

Moss-cyanobacteria associations as biogenic sources of nitrogen in boreal forest ecosystems

Frontiers in Microbiology, 2013
The biological fixation of atmospheric nitrogen (N) is a major pathway for available N entering ecosystems. In N-limited boreal forests, a significant amount of N2 is fixed by cyanobacteria living in association with mosses, contributing up to 50 % to ...
Kathrin eRousk, Davey L. Jones, Thomas H. DeLuca   +2 more
doaj   +1 more source

Systemic regulation of soybean nodulation and nitrogen fixation by nitrogen via isoflavones

Frontiers in Plant Science, 2022
Nitrogen (N) inhibits soybean (Glycine max L.) nodulation and N2 fixation. Isoflavones secreted by soybean roots can stimulate signal transduction for symbiotic nodules, thus playing a key role in root nodule development and N2 fixation. The relationship
Xiaochen Lyu, Chunyan Sun, Tao Lin, Xuelai Wang, Sha Li, Sha Li, Shuhong Zhao, Shuhong Zhao, Zhenping Gong, Ziwei Wei, Chao Yan, Chunmei Ma   +11 more
doaj   +1 more source

The sensitivity of marine N2 fixation to dissolved inorganic nitrogen

Frontiers in Microbiology, 2012
The dominant process adding nitrogen (N) to the ocean, di-nitrogen (N2) fixation, is mediated by prokaryotes (diazotrophs) sensitive to a variety of environmental factors.
Angela eKnapp
doaj   +1 more source

Heterogeneity of nitrogen fixation in the mesopelagic zone of the South China Sea

Frontiers in Marine Science
Biological dinitrogen (N2) fixation, the energetically expensive conversion of N2 gas to ammonia, plays an essential role in balancing the nitrogen budget in the ocean.
Siqi Wu, Siqi Wu, Xianhui Sean Wan, Xianhui Sean Wan, Moge Du, Moge Du, Xirong Chen, Corday R. Selden, Mar Benavides, Mar Benavides, Mar Benavides, Sophie Bonnet, Carolin R. Löscher, Carolin R. Löscher, M. Robert Hamersley, Margaret R. Mulholland, Xiuli Yan, Shuh-Ji Kao   +17 more
doaj   +1 more source

Incorporating a prognostic representation of marine nitrogen fixers into the global ocean biogeochemical model HAMOCC

Journal of Advances in Modeling Earth Systems, 2017
Nitrogen (N2) fixation is a major source of bioavailable nitrogen to the euphotic zone, thereby exerting an important control on ocean biogeochemical cycling.
Hanna Paulsen, Tatiana Ilyina, Katharina D. Six, Irene Stemmler   +3 more
doaj   +1 more source

Benthic nitrogen fixation in Zostera marina meadows in an upwelling-influenced coastal lagoon

Ciencias Marinas, 2017
Dinitrogen (N2) fixation rates were determined in the phyllosphere and in sediments with and without the presence of eelgrass (Zostera marina) in San Quintín Bay, an upwelling-influenced coastal lagoon in the NE Pacific.
Julieta Hernández-López, Víctor F Camacho-Ibar, Alfonso Macías-Tapia, Karen J McGlathery, Luis W Daesslé, Jose M Sandoval-Gil   +5 more
doaj   +1 more source

Simultaneous Measurements of Dinitrogen Fixation and Denitrification Associated With Coral Reef Substrates: Advantages and Limitations of a Combined Acetylene Assay

Frontiers in Marine Science, 2020
Nitrogen (N) cycling in coral reefs is of key importance for these oligotrophic ecosystems, but knowledge about its pathways is limited. While dinitrogen (N2) fixation is comparably well studied, the counteracting denitrification pathway is under ...
Yusuf C. El-Khaled, Florian Roth, Florian Roth, Florian Roth, Nils Rädecker, Nils Rädecker, Nils Rädecker, Najeh Kharbatia, Burton H. Jones, Christian R. Voolstra, Christian R. Voolstra, Christian Wild   +11 more
doaj   +1 more source