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Volume 12, issue 15
Biogeosciences, 12, 4751–4764, 2015
https://doi.org/10.5194/bg-12-4751-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Biogeosciences, 12, 4751–4764, 2015
https://doi.org/10.5194/bg-12-4751-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 07 Aug 2015

Research article | 07 Aug 2015

Nitrogen fixation and the diazotroph community in the temperate coastal region of the northwestern North Pacific

T. Shiozaki et al.

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Cited articles

Bentzon-Tilia, M., Farnelid, H., Jürgens, K. and Riemann, L.: Cultivation and isolation of N2-fixing bacteria from suboxic waters in the Baltic Sea, FEMS Microbiol. Ecol., 88, 358–371, 2014.
Bentzon-Tilia, M., Traving, S. J., Mantikci, M., Knudsen-Leerbeck, H., Hansen, J. L. S., Markager, S., and Riemann, L.: Significant N2 fixation by heterotrophs, photoheterotrophs and heterocystous cyanobacteria in two temperate estuaries, ISME J., 9, 273–285, 2015.
Bertics, V. J., Löscher, C. R., Salonen, I., Dale, A. W., Gier, J., Schmitz, R. A., and Treude, T.: Occurrence of benthic microbial nitrogen fixation coupled to sulfate reduction in the seasonally hypoxic Eckernförde Bay, Baltic Sea, Biogeosciences, 10, 1243–1258, https://doi.org/10.5194/bg-10-1243-2013, 2013.
Blais, M., Tremblay, J.-E., Jungblut, A. D., Gagnon, J., Martin, J., Thaler, M., and Lovejoy, C.: Nitrogen fixation and identification of potential diazotrophs in the Canadian Arctic, Global Biogeochem. Cy., 26, GB3022, https://doi.org/10.1029/2011GB004096, 2012.
Bonnet, S., Dekaezemacker, J., Turk-Kubo, K. A., Moutin, T., Hamersley, R. M., Grosso, O., Zehr, J. P., and Capone, D. G.: Aphotic N2 fixation in the Eastern Tropical South Pacific Ocean, PLoS ONE, 8, e81265, https://doi.org/10.1371/journal.pone.0081265, 2013.
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We found that nitrogen fixation can proceed at high rates, depending on the season, in the temperate coastal region of the northwestern North Pacific. nifH sequences were omnipresent and recovered throughout the year. UCYN-A was a major diazotroph during summer, whereas Trichodesmium was abundant during fall, despite low temperatures. The Cluster III diazotrophs, putative anaerobic bacteria, were found at the surface throughout the year.
We found that nitrogen fixation can proceed at high rates, depending on the season, in the...
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