@InProceedings{Fernández-CarreraDetoBranSubr:2020:NiFiCa,
               author = "Fern{\'a}ndez-Carrera, Ana and Detoni, Am{\'a}lia Maria 
                         Sacilotto and Brandt, Peter and Subramaniam, Ajit",
          affiliation = "{University of Vigo} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and GEOMAR and {Columbia University}",
                title = "Nitrogen fixation can support a substantial fraction of pelagic 
                         primary production in Brazilian waters",
            booktitle = "Proceedings...",
                 year = "2020",
         organization = "Ocean Sciences Meeting",
             abstract = "Nitrogen fixers are commonly found in near-shore waters off the 
                         coast of Brazil in the South Atlantic Ocean (e.g., Trichodesmium 
                         spp, unicellular cyanobacteria, diazotroph-diatoms associations). 
                         Their relatively high abundances suggest that nitrogen fixation 
                         could be substantial in these waters. In February 2018, we did two 
                         zonal transects perpendicular to the coasts of Brazil at 5° and 
                         11°S aboard RV Meteor. There, we measured concurrent rates of 
                         nitrogen fixation and primary production at 10m depth using stable 
                         tracers (13C and 15N) and nitrogen stable isotopes in seston 
                         (\δ15N, air ) throughout the euphotic layer along with the 
                         hydrographic structure of the water column. In both transects, the 
                         rates of nitrogen fixation were variable, depicted no clear zonal 
                         pattern, and ranged between 0.5 and 10 nmol N L\−1 
                         d\−1 (0.01\−0.14 mg N m\−3 d\−1). 
                         Primary production showed the same behavior and ranged between 1 
                         and 8 mg C m-3 d-1. Nitrogen fixation supported less than 15% of 
                         primary production in all stations but one at 11°S, where it 
                         seemed to exceed the requirements of primary producers (>100%). 
                         However, the \δ15N of seston was consistently below 4 in the 
                         euphotic layer, pointing to a persistent supply of nitrogen by 
                         nitrogen fixation through time.",
  conference-location = "San Diego, California",
      conference-year = "16-21 feb.",
             language = "en",
        urlaccessdate = "27 abr. 2024"
}