In the ocean, [N.sub.2]-fixation is mediated only by prokaryotic photoautotrophs including cyanobacteria and photosynthetic bacteria.
(2008) Diazotrophic cyanobacteria as the major photoautotrophs during mid-Cretaceous Oceanic Anoxic Events: nitrogen and carbon isotopic evidence from sedimentary porphyrin.
(2008) Reconstruction of the biogeochemistry and ecology of photoautotrophs based on the nitrogen and carbon isotopic compositions of vanadyl porphyrins from Miocene siliceous sediments.
But Desulfovibrio is not a photoautotroph
; it's a chemoautotroph.
Besides, due to it photoautotrophs
characteristics cyanobacteria also known as blue-green algae and green pigments which result from photosynthesis.
The different rates can nearly overlap for disparate life-forms, much as noted two paragraphs above for simple animals (heterotrophic ectotherms) and efficient plants (advanced photoautotrophs
Orth, "Dynamics of epiphytic photoautotrophs
and heterotrophs in Zostera marina (Eelgrass) microcosms: responses to nutrient enrichment and grazing," Estuaries, vol.
piscesae metabolite flux, and support previous suppositions that hydrothermal vent vestimentiferan tubeworms are tremendous primary producers, comparable in body growth and mass specific rates to productive photoautotrophs
(Lutz et al., 1994; Girguis and Childress.
All these factors seriously limit photosynthesis by photoautotrophs
, mainly microscopic planktonic algae and cyanobacteria.
Each microcosm was supplied with inorganic and organic nutrients, photoautotrophs
, and decomposers.