Role of marine microorganisms in sulphur cycling

Baburić, Matea (2011) Role of marine microorganisms in sulphur cycling. Bachelor's thesis, Faculty of Science > Department of Biology.

[img] PDF
Restricted to Registered users only
Language: Croatian

Download (239kB) | Request a copy

Abstract

Autotrophic organisms are receiving inorganic substances from the environment to synthesize organic compounds using light energy (phototrophic) or by chemical energy released in various chemical reactions (chemoautotrophic). Chemoautotrophic organisms transform sulfur, nitrogen, iron, manganese and carbon. Sulfur bacteria live on the muddy bottom of sediments, in sulfur springs, generally in places where they transform hydrogen sulphide. They can oxidize compounds containing sulfur, such as hydrogen sulfide, which occurs during decomposition of organic material or the reduction of sulfate. This reaction is carried out by Beggiatoa and Thiothrix. Thiobacillus can oxidize hydrogen, sulfide, sulfate and other sulfur compounds, while Desulfovibrio is a sulfate-reducing bacteria using sulfate as an electron acceptor during oxidation of different electron donors. The published case study int he gypsum crust, vertical distribution of phototrophic, sulfate reducers and methanogens in salinities of 156 and 206 g/L was examined using microsensors for oxygen, pH and sulfide. Community of sulfate reducing bacteria varied with the depth of the crust and their diversity was lower as the salinity increased.

Item Type: Thesis (Bachelor's thesis)
Supervisor: Viličić, Damir
Date: 2011
Number of Pages: 14
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 28 Oct 2014 09:49
Last Modified: 28 Oct 2014 09:49
URI: http://digre.pmf.unizg.hr/id/eprint/3190

Actions (login required)

View Item View Item