Original paper

Investigation of the cellular metabolism as a basis for the processes taking place in the water biotopes by means of the thermodynamics of irreversible processes

Dechev, G.

Abstract

The work discusses the intracellular oxidation-reduction potential (ORP) of the organisms inhabiting the biotope and the ORP of the water reservoir from the point of view of the thermodynamics of irreversible processes, as resulting from substance fluxes (mainly oxygen) in open systems. The complete dependence of the ORP of the environment on the character and intensity of the metabolic processes in the organisms is demonstrated. Conversely, the dependence of the intracellular metabolism on the ORP of the environment is also given and a study is made of the evolution of the two systems upon a decreasing oxygen concentration, including its complete exhaustion and the establishment of anaerobic conditions in the sediments. A description is presented of the dependence between the eutrophication of a given water reservoir and its deviation from the equilibrium - the creation of gradients and with this the intensification of the fluxes, which makes it the object of study of the thermodynamics of irreversible processes and requires its description to be given by means of fluxes.

Keywords

cellular metabolismbiotopesthermodynamicoxygenanaerobic conditions