2] required for photosynthesis), and photoheterotrophic
(use light to extract energy from organic matter) .
Although diatoms known to contain nitrogen-fixing cyanobacteria (Rhizosolenia and Hemiaulus) appear to be well represented in the waters near Easter and Salas y Gomez islands, a diverse group of heterotrophic, nitrogen-fixing bacteria or photoheterotrophic
cyanobacteria may dominate nitrogen fixation in the south Pacific subtropical gyre (Von Dassow & Collado-Fabbri, 2014).
1987) proposed that, because light levels and DO vary during the day, this bacterium alternates between photoheterotrophic
growth (at high light levels; using organic matter excreted by the cyanobacteria) and sulfide co-metabolism with cyanobacteria (at relatively low light levels, where [O.
1981, 1984b) noted that the main growth phase is the planktonic form which is photoautotrophic while the benthic form is photoheterotrophic
and serves as the <<inoculum>> for the plankton.
2]-fixing bacteria and possibly photoheterotrophic
unicellular cyanobacteria appeared to dominate [N.