Role of phototrophic bacteria in the sulfur cycle of a meromietic lake

Journal Article · Tue Sep 01 00:00:00 EDT 1981 · Limnol. Oceanogr.; (United States)

DOI:https://doi.org/10.4319/lo.1981.26.5.0880· OSTI ID:5809740

Parkin, T B ^[1]; Brock, T D

---

1. Michigan State Univ., East Lansing

During the summer months a dense population of green sulfur bacteria was observed in meromictic Knaack Lake, Wisconsin, at a depth where oxygen was not present. During the day, H/sub 2/S was also absent at this depth but built up at night. /sup 14/CO/sub 2/ studies revealed that in the light the green bacteria were photosynthetically active and oxidized the H/sub 2/S. The ratio of H/sub 2/S oxidized to CO/sub 2/ fixed was about 0.5, indicating that H/sub 2/S was completely oxidized to sulfate. In the dark, CO/sub 2/ fixation did not occur and H/sub 2/S accumulated. These results are related to the diurnal changes of H/sub 2/S in the lake and to sulfate reduction rates in the water column.

• OSTI ID: 5809740
• Journal Information: Limnol. Oceanogr.; (United States), Vol. 26:5
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
LAKES
PHOTOSYNTHETIC BACTERIA
SULFUR CYCLE
AQUATIC ECOSYSTEMS
CARBON 14 COMPOUNDS
CARBON DIOXIDE
DAILY VARIATIONS
HYDROGEN SULFIDES
METABOLISM
OXIDATION
WISCONSIN
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ECOSYSTEMS
GREAT LAKES REGION
HYDROGEN COMPOUNDS
LABELLED COMPOUNDS
NORTH AMERICA
OXIDES
OXYGEN COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
SURFACE WATERS
USA
VARIATIONS
520200* - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)