Interactions between phytoplankton and heterotrophic bacteria have been intensively studied, but many aspects of these interactions are still unknown because most of the studies were performed under non-axenic conditions. Therefore, we investigated the growth and release of dissolved organic matter of the marine diatom Thalassiosira rotula in axenic culture in comparison to T. rotula cultures i...

Three strains of filamentous Cyanobacteria were used to study their growth and utilization of organophosphorus pesticide malathion. A sharp decrease in the growth of the algal strains was observed by increasing the concentration of malathion. Amongst them Nostoc muscorum tolerated different concentrations and was recorded as the highest efficient strain for biodegradation (91%) of this compound...

Roseobacticides regulate the symbiotic relationship between a marine bacterium (Phaeobacter inhibens) and a marine microalga (Emiliania huxleyi). This relationship can be mutualistic, when the algal host provides food for the bacteria and the bacteria produce growth hormones and antibiotics for the algae, or parasitic, when the algae senesce and release p-coumaric acid. The released p-coumaric ...

This thesis describes research done on two novel algae cultivation systems. The first system was an attached algal growth system to facilitate biomass harvest with improved biomass yield. In the attached system, algal cells were grown on the surface of a material rotating between the nutrient-rich liquid phase and the carbon dioxide-rich gaseous phase. The algal cells from the attached growth s...

The review summarizes and systematizesthe data accumulated in recent years as a result of research commercial trials seaweed extracts (SE). results the assessment SE special class biostimulants key problems manufacturing process are presented. chemical composition range their positive effects on plants, such accelerating seed germination rooting cuttings, stimulating growth shoots roots, increa...

introduction one of the important events that usually occur in seas and large water bodies’ concurrent with the change of season is the growth and species increase of phytoplankton. in the natural environment, this event does not result in imbalances of water ecosystems. however, pollution caused by human activities results in excessive growth and reproduction of phytoplankton and other opportu...

the algae of gargar river (one of branches of karoon river) which were investigated in samples collected from habitats (epilithic, epiphytic, epipelic) at eleven station between december 2004 and september 2005.this river receive types of sewage such as municipal wastewater, agriculture and aquaculture wastewater the flora consisted of 5 class and 24 genera belonging to the bacillariophycea (12...

As man continues to expand and to develop large land areas near surface waters the pollution of these waters will intensify. Historically man has used lakes and rivers for waste disposal with little regard to the effects of these wastes on the receiving waters . . . With the predicted population growth and subsequent demands on the environment, the frequency with which recreational and muncipal...