Bacterial photosynthesis in surface waters of the open ocean

Z. S. Kolber, C. L. Van Dover, R. A. Niederman and P. G. Falkowski ()
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Z. S. Kolber: Environmental Biophysics and Molecular Ecology Program, Institute of Marine and Coastal Sciences, Rutgers University
C. L. Van Dover: College of William & Mary
R. A. Niederman: Rutgers University
P. G. Falkowski: Environmental Biophysics and Molecular Ecology Program, Institute of Marine and Coastal Sciences, Rutgers University

Nature, 2000, vol. 407, issue 6801, 177-179

Abstract: Abstract The oxidation of the global ocean by cyanobacterial oxygenic photosynthesis, about 2,100 Myr ago1, is presumed to have limited anoxygenic bacterial photosynthesis to oceanic regions that are both anoxic and illuminated2,3. The discovery of oxygen-requiring photosynthetic bacteria about 20 years ago4 changed this notion, indicating that anoxygenic bacterial photosynthesis could persist under oxidizing conditions. However, the distribution of aerobic photosynthetic bacteria in the world oceans, their photosynthetic competence and their relationship to oxygenic photoautotrophs on global scales are unknown. Here we report the first biophysical evidence demonstrating that aerobic bacterial photosynthesis is widespread in tropical surface waters of the eastern Pacific Ocean and in temperate coastal waters of the northwestern Atlantic. Our results indicate that these organisms account for 2–5% of the photosynthetic electron transport in the upper ocean.

Date: 2000
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DOI: 10.1038/35025044

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