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Identifier

000376374

Title

Πειραματική προσέγγιση των επιπτώσεων του οργανικού εμπλουτισμού στη σύνθεση της φωτοσυνθετικής βακτηριακής κοινότητας του θαλάσσιου ιζήματος

Alternative Title

Experimental approach of the effects of organic enrichement in phototrophic bacterial composition on marine sediment

Binding designer

Τσικοπούλου, Ειρήνη

Thesis advisor

Καρακάσης, Ι

Abstract

The impacts of organic enrichment οn marine sediments were investigated under controlled conditions in the laboratory. The study was focused on the microphytobenthos composition by means of pigment analysis by HPLC. Sediment samples were collected from three areas with different microbial characteristics and were incubated in four separate tanks at different aeration supply and organic enrichment conditions. Several geochemical variables were measured during the experiment. Although the sediments had initially different reactions to organic enrichment, the values of the geochemical variables gradually converged. Aerobic metabolism was replaced by microbial sulfate reduction in the sediment under conditions of high organic enrichment. Still, anoxygenic phototrophic bacteria species that grown in each sediment differed. These differences in the anoxygenic bacterial composition between the sediments were also discussed.

Language

Greek

Subject

Phototrophic purple and green sulfur bacterial

Αναερόβια φωτοσυμθετικά βακτήρια

Θαλάσσιο ίζημα

Issue date

2012-11-16

Collection

School/Department--School of Sciences and Engineering--Department of Biology--Post-graduate theses

Type of Work--Post-graduate theses

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