Search Results - "Turk, Kendra A."

Light and depth dependency of nitrogen fixation by the non‐photosynthetic, symbiotic cyanobacterium UCYN‐A by Gradoville, Mary R., Cabello, Ana M., Wilson, Samuel T., Turk‐Kubo, Kendra A., Karl, David M., Zehr, Jonathan P.

“…Summary The symbiotic cyanobacterium UCYN‐A is one of the most globally abundant marine dinitrogen (N2)‐fixers, but cultures have not been available and its…”
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Unexpected presence of the nitrogen‐fixing symbiotic cyanobacterium UCYN‐A in Monterey Bay, California by Cabello, Ana M., Turk‐Kubo, Kendra A., Hayashi, Kendra, Jacobs, Lucien, Kudela, Raphael M., Zehr, Jonathan P., Mock, T.

“…In the last decade, the known biogeography of nitrogen fixation in the ocean has been expanded to colder and nitrogen‐rich coastal environments. The symbiotic…”
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paradox of marine heterotrophic nitrogen fixation: abundances of heterotrophic diazotrophs do not account for nitrogen fixation rates in the Eastern Tropical South Pacific by Turk‐Kubo, Kendra A, Karamchandani, Muskan, Capone, Douglas G, Zehr, Jonathan P

“…Results of recent modelling efforts imply denitrification‐influenced waters, such as those in the Eastern Tropical South Pacific (ETSP), may support high rates…”
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Aphotic N2 fixation in the Eastern Tropical South Pacific Ocean by Bonnet, Sophie, Dekaezemacker, Julien, Turk-Kubo, Kendra A, Moutin, Thierry, Hamersley, Robert M, Grosso, Olivier, Zehr, Jonathan P, Capone, Douglas G

“…We examined rates of N2 fixation from the surface to 2000 m depth in the Eastern Tropical South Pacific (ETSP) during El Niño (2010) and La Niña (2011)…”
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Distinct ecological niches of marine symbiotic N2‐fixing cyanobacterium Candidatus Atelocyanobacterium thalassa sublineages by Turk‐Kubo, Kendra A., Farnelid, Hanna M., Shilova, Irina N., Henke, Britt, Zehr, Jonathan P., Post, A.

“…A recently described symbiosis between the metabolically streamlined nitrogen‐fixing cyanobacterium UCYN‐A and a single‐celled eukaryote prymnesiophyte alga is…”
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Metabolic streamlining in an open-ocean nitrogen-fixing cyanobacterium by Zehr, Jonathan P, Tripp, H. James, Bench, Shellie R, Turk, Kendra A, Foster, Rachel A, Desany, Brian A, Niazi, Faheem, Affourtit, Jason P

“…Nitrogen (N2)-fixing marine cyanobacteria are an important source of fixed inorganic nitrogen that supports oceanic primary productivity and carbon dioxide…”
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UCYN‐A3, a newly characterized open ocean sublineage of the symbiotic N2‐fixing cyanobacterium Candidatus Atelocyanobacterium thalassa by Cornejo‐Castillo, Francisco M., Muñoz‐Marín, Maria del Carmen, Turk‐Kubo, Kendra A., Royo‐Llonch, Marta, Farnelid, Hanna, Acinas, Silvia G., Zehr, Jonathan P.

“…Summary The symbiotic unicellular cyanobacterium Candidatus Atelocyanobacterium thalassa (UCYN‐A) is one of the most abundant and widespread nitrogen…”
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Nitrogen Fixation in Mesoscale Eddies of the North Pacific Subtropical Gyre: Patterns and Mechanisms by Dugenne, Mathilde, Gradoville, Mary R., Church, Matthew J., Wilson, Samuel T., Sheyn, Uri, Harke, Matthew J., Björkman, Karin M., Hawco, Nicholas J., Hynes, Annette M., Ribalet, François, Karl, David M., DeLong, Edward F., Dyhrman, Sonya T., Armbrust, E. Virginia, John, Seth, Eppley, John M., Harding, Katie, Stewart, Brittany, Cabello, Ana M., Turk‐Kubo, Kendra A., Caffin, Mathieu, White, Angelicque E., Zehr, Jonathan P.

“…Mesoscale eddies have been shown to support elevated dinitrogen (N2) fixation rates (NFRs) and abundances of N2‐fixing microorganisms (diazotrophs), but the…”
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Contrasted geographical distribution of N2 fixation rates and nifH phylotypes in the Coral and Solomon Seas (southwestern Pacific) during austral winter conditions by Bonnet, Sophie, Rodier, Martine, Turk-Kubo, Kendra A., Germineaud, Cyril, Menkes, Christophe, Ganachaud, Alexandre, Cravatte, Sophie, Raimbault, Patrick, Campbell, Ellen, Quéroué, Fabien, Sarthou, Géraldine, Desnues, Anne, Maes, Christophe, Eldin, Gerard

“…Biological dinitrogen (N2) fixation and the distribution of diazotrophic phylotypes were investigated during two cruises in the Coral Sea and the Solomon Sea…”
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Rapid annotation of nifH gene sequences using classification and regression trees facilitates environmental functional gene analysis by Frank, Ildiko E., Turk-Kubo, Kendra A., Zehr, Jonathan P.

“…Summary The nifH gene is a widely used molecular proxy for studying nitrogen fixation. Phylogenetic classification of nifH gene sequences is an essential step…”
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Nitrogen fixation and nitrogenase ( ) expression in tropical waters of the eastern North Atlantic by A Turk, Kendra, Rees, Andrew P, Zehr, Jonathan P, Pereira, Nicole, Swift, Paul, Shelley, Rachel, Lohan, Maeve, Woodward, E Malcolm S, Gilbert, Jack

“…Expression of nifH in 28 surface water samples collected during fall 2007 from six stations in the vicinity of the Cape Verde Islands (north-east Atlantic) was…”
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Symbiotic unicellular cyanobacteria fix nitrogen in the Arctic Ocean by Harding, Katie, Turk-Kubo, Kendra A., Sipler, Rachel E., Mills, Matthew M., Bronk, Deborah A., Zehr, Jonathan P.

“…Biological dinitrogen (N₂) fixation is an important source of nitrogen (N) in low-latitude open oceans. The unusual N₂-fixing unicellular cyanobacteria…”
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Diazotroph Diversity in the Sea Ice, Melt Ponds, and Surface Waters of the Eurasian Basin of the Central Arctic Ocean by Fernández-Méndez, Mar, Turk-Kubo, Kendra A, Buttigieg, Pier L, Rapp, Josephine Z, Krumpen, Thomas, Zehr, Jonathan P, Boetius, Antje

“…The Eurasian basin of the Central Arctic Ocean is nitrogen limited, but little is known about the presence and role of nitrogen-fixing bacteria. Recent studies…”
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Overlooked and widespread pennate diatom-diazotroph symbioses in the sea by Schvarcz, Christopher R., Wilson, Samuel T., Caffin, Mathieu, Stancheva, Rosalina, Li, Qian, Turk-Kubo, Kendra A., White, Angelicque E., Karl, David M., Zehr, Jonathan P., Steward, Grieg F.

“…Persistent nitrogen depletion in sunlit open ocean waters provides a favorable ecological niche for nitrogen-fixing (diazotrophic) cyanobacteria, some of which…”
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Unusual marine cyanobacteria/haptophyte symbiosis relies on N2 fixation even in N-rich environments by Mills, Matthew M., Turk-Kubo, Kendra A., van Dijken, Gert L., Henke, Britt A., Harding, Katie, Wilson, Samuel T., Arrigo, Kevin R., Zehr, Jonathan P.

“…The microbial fixation of N 2 is the largest source of biologically available nitrogen (N) to the oceans. However, it is the most energetically expensive…”
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High biomass turnover rates of endosymbiotic nitrogen‐fixing cyanobacteria in the western Bering Sea by Cheung, Shunyan, Liu, Kailin, Turk‐Kubo, Kendra A., Nishioka, Jun, Suzuki, Koji, Landry, Michael R., Zehr, Jonathan P., Leung, Szeki, Deng, Lixia, Liu, Hongbin

“…Recent studies have described active nitrogen fixation in high‐latitude waters, but the ecological controls on the occurrence or activity of nitrogen‐fixing…”
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Patterns of 15N assimilation and growth of methanotrophic ANME‐2 archaea and sulfate‐reducing bacteria within structured syntrophic consortia revealed by FISH‐SIMS by Orphan, Victoria J., Turk, Kendra A., Green, Abigail M., House, Christopher H.

“…Summary Methane release from the oceans is controlled in large part by syntrophic interactions between anaerobic methanotrophic archaea (ANME) and…”
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Seasonal and spatial patterns in diazotroph community composition at Station ALOHA by Turk-Kubo, Kendra A., Henke, Britt A., Gradoville, Mary R., Magasin, Jonathan D., Church, Matthew J., Zehr, Jonathan P.

“…Dinitrogen (N 2 ) fixation is carried out by specialized microbes, called diazotrophs, and is a major source of nitrogen supporting primary production in…”
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Cell-specific measurements show nitrogen fixation by particle-attached putative non-cyanobacterial diazotrophs in the North Pacific Subtropical Gyre by Harding, Katie J., Turk-Kubo, Kendra A., Mak, Esther Wing Kwan, Weber, Peter K., Mayali, Xavier, Zehr, Jonathan P.

“…Biological nitrogen fixation is a major important source of nitrogen for low-nutrient surface oceanic waters. Nitrogen-fixing (diazotrophic) cyanobacteria are…”
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Nitrogenase (nifH) gene expression in diazotrophic cyanobacteria in the Tropical North Atlantic in response to nutrient amendments by Turk-Kubo, Kendra A, Achilles, Katherine M, Serros, Tracy R C, Ochiai, Mari, Montoya, Joseph P, Zehr, Jonathan P

“…The Tropical North Atlantic (TNAtl) plays a critical role in the marine nitrogen cycle, as it supports high rates of biological nitrogen (N(2)) fixation, yet…”
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