Results 1 to 10 of about 54,026 (308)

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

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

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

Critical Role of Light in the Growth and Activity of the Marine N2-Fixing UCYN-A Symbiosis

Frontiers in Microbiology, 2021
The unicellular N2-fixing cyanobacteria UCYN-A live in symbiosis with haptophytes in the Braarudosphaera bigelowii lineage. Maintaining N2-fixing symbioses between two unicellular partners requires tight coordination of multiple biological processes ...
Marine Landa, Kendra A. Turk-Kubo, Francisco M. Cornejo-Castillo, Britt A. Henke, Jonathan P. Zehr   +4 more
doaj   +1 more source

Methanotrophy Alleviates Nitrogen Constraint of Carbon Turnover by Rice Root-Associated Microbiomes

Frontiers in Microbiology, 2022
The bioavailability of nitrogen constrains primary productivity, and ecosystem stoichiometry implies stimulation of N2 fixation in association with carbon sequestration in hotspots such as paddy soils.
Weiwei Cao, Weiwei Cao, Yuanfeng Cai, Zhihua Bao, Zhihua Bao, Shuwei Wang, Xiaoyuan Yan, Zhongjun Jia, Zhongjun Jia   +8 more
doaj   +1 more source

Direct and indirect costs of dinitrogen fixation in Crocosphaera watsonii WH8501 and possible implications for the nitrogen cycle

Frontiers in Microbiology, 2012
The recent detection of heterotrophic nitrogen (N2) fixation in deep waters of the southern Californian and Peruvian OMZ questions our current understanding of marine N2 fixation as a process confined to oligotrophic surface waters of the oceans.
Tobias eGroßkopf, Julie eLaRoche
doaj   +1 more source

Di-nitrogen fixation at the early and late growth stages of soybean

Acta Scientiarum. Agronomy, 2018
  Soybean derives a significant portion of the required nitrogen (N) from the symbiosis with rhizobia bacteria. However, information on the available genetic variation for N2 fixation capacity in different growth stages of soybean is limited.
Raphael Lemes Hamawaki, Stella K. Kantartzi   +1 more
doaj   +1 more source

Preliminary estimates of the contribution of Arctic nitrogen fixation to the global nitrogen budget

Limnology and Oceanography Letters, 2017
Dinitrogen (N2) fixation is the source of all biologically available nitrogen on earth, and its presence or absence impacts net primary production and global biogeochemical cycles.
Rachel E. Sipler, Donglai Gong, Steven E. Baer, Marta P. Sanderson, Quinn N. Roberts, Margaret R. Mulholland, Deborah A. Bronk   +6 more
doaj   +1 more source

Benthic Dinitrogen Fixation Traversing the Oxygen Minimum Zone Off Mauritania (NW Africa)

Frontiers in Marine Science, 2017
Despite its potential to provide new nitrogen (N) to the environment, knowledge on benthic dinitrogen (N2) fixation remains relatively sparse, and its contribution to the marine N budget is regarded as minor.
Jessica Gier, Carolin R. Löscher, Andrew W. Dale, Stefan Sommer, Ulrike Lomnitz, Tina Treude, Tina Treude   +6 more
doaj   +1 more source