+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Rates of sulfate reduction and thiosulfate consumption in a marine microbial mat

, : Rates of sulfate reduction and thiosulfate consumption in a marine microbial mat. FEMS Microbiology Ecology 86(4): 283-293

The sulfur cycle in a microbial mat was studied by determining viable counts of sulfate-reducing bacteria, chemolithautotrophic sulfur bacteria and anoxygenic phototrophic bacteria. All three functional groups of sulfur bacteria revealed a maximum population density in the uppermost 5 mm of the mat: 1.1 .times. 108 cells of sulfate reducers cm-3 sediment, 2.0 .times. 109 cells of chemolithoautotrophs cm-3 sediment, and 4.0 .times. 107 cells of anoxygenic phototrophs cm-3 sediment. Bacterial dynamcis were studied by sulfate reduction rate measurements, both under anoxic conditions (dark incubation) and oxic conditions (incubation in the light), and determination of the vertical distribution of the potential rate of thiosulfate consumption under oxic conditions. Sulfate reduction rates in the top 5 mm of the sediment were 566 nmol cm-3 d-1 in the absence of oxygen, and 123 nmol cm-3 d-1 in the presence of oxygen. In the latter case, the maximum rate was found in the 5-10-mm depth horizon (361 nmol cm-3 d-1). Biological consumption of amended thiosulfate was rapid and decreased with depth, while in the presence of molybdate, thiosulfate consumption decreased to 10-30% of the original rate.


DOI: 10.1111/j.1574-6941.1992.tb01763.x

Other references

Merkel, K.D.; Peters, R.D.; Sellin, P.B.; Repasky, K.S.; Babbitt, W.R., 2007: Accumulated programming of a complex spectral grating. A complex spectral grating is accumulated by repeated application of a pair of low-power optical programming pulses to a short-term persistent inhomogeneously broadened transition in Tm:YAG at 4.5 K and then probed to investigate the buildup dynam...

Bruce W.; Gurley W.B., 1986: Ti plasmid dna 780 gene a model for constitutive nuclear gene of higher plants. Journal of Cellular Biochemistry Supplement (10 PART D): 166

Rousseau C., 1971: A classification of the synanthropic flora of quebec and ontario part 2 list of species. Naturaliste Canadien (quebec): 697-730

Zderkiewicz, T., 1971: Content of oil in different stages of ripe fruits of diploid and tetraploid cumin, Carum carvi L. Acta agrobotanica: 4 (1) 121-127

Leutzinger, E.E.; Bowles, W.A.; Robins, R.K.; Townsend, L.B., 1968: Purine nucleosides. 18. The direct utilization of unsaturated sugars in nucleoside syntheses. The conformation and structure of certain 9-(2-deoxyribopyranosyl)purines prepared from D-arabinal. Journal of the American Chemical Society 90(1): 127-136

Petrov Y.N., 1981: Bacterial contamination of water supply aboard sea going ships and its de contamination during distillation. The main source of bacterial contamination of a vessel's water supply was not shore waste water discharge but the waste drainage of the vessel itself when the ship was anchored and wastes were not carried away by water movement caused by the...

Cunha, S.L.D.C.strillon, A.L.; Lacaz, C.D.S., 1970: Post-operative endophthalmitis of mycotic origin caused by C. sp. Report of three cases. The 3 infections reported developed following surgery for senile cataract. The C. sp. isolated from the eviscerated eyes was also obtained from a bottle of pilocarpine used for eye drops. The use of eye drops in individual ampoules is advised.

Ni, Y.C.; Zhan, C.Q.; HA.S.H.; Shao, B.R., 1982: The embryotoxicity of a new antimalarial pyronaridine in rats. Yao Xue Xue Bao 17(6): 401-406

Droste, D.W.; Lakemeier, S.; Wichter, T.; Stypmann, Jörg.; Dittrich, R.; Ritter, M.; Moeller, M.; Freund, M.; Ringelstein, E.Bernd., 2002: Optimizing the technique of contrast transcranial Doppler ultrasound in the detection of right-to-left shunts. Background and Purpose-A cardiac right-to-left shunt (RLS) can be identified by transesophageal echocardiography and transcranial Doppler ultrasound (TCD) with contrast agents and a Valsalva maneuver (VM) as a provocation procedure. This article a...

Gilbert, P.E.; Kesner, R.P.; Lee, I., 2002: Dissociating hippocampal subregions: double dissociation between dentate gyrus and CA1. This study presents a double dissociation between the dentate gyrus (DG) and CA1. Rats with either DG or CA1 lesions were tested on tasks requiring either spatial or spatial temporal order pattern separation. To assess spatial pattern separation,...