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- Title
Photosynthetic sulfide oxidation in marine sediments.
- Authors
Blackburn, T. H.; Kleiber, P.; Fenchel, T.
- Abstract
Sulfide concentration was measured at 1 mm Intervals in marine sediment cores using Ag-AgS multiple electrodes. Illumination of the cores produced a marked decrease in sulfide concentration due to photosynthetic sulfur bacteria. Those decreases were restricted to the upper 3 mm of the cores. After some time the cores lost their capacity to generate sulfide; they could be rejuvenated by the addition of cellulose, lactate or sulfide. The rate of utilization of sulfide was proportional to sulfide concentration up to 1.0 mmole the maximum rate being 0.25 mmoles 1-1 min-1. Light saturation with incandescent light occurred above 2000 lx. Sulfide photosynthetic oxidation did not operate with fluorescent light. was Less effective with any decrease in red light (640 nm) and was less efficient in infrared than in red Light indicating that green sulfur bacteria were more important than purple bacteria in oxidizing sulfide in the studied sediments. temperature had some effect on the photosynthetic oxidation of sulfide but there was & much greater effect on the rate of sulfide reappearance in the dark.
- Subjects
OXIDATION; SULFIDES; MARINE sediments; SEDIMENTS; SULFUR; OCEAN bottom
- Publication
Oikos, 1975, Vol 26, Issue 2, p103
- ISSN
0030-1299
- Publication type
Article
- DOI
10.2307/3543698