Ecological models are simplified representations of the real ecosystem, which are used to improve our understanding of ecological relationships and processes as well as to predict their dynamics. It is most often a mathematical representation of the system and, according to their complexity, they range from simple analytical models to complicated realistic prognostic systems. Ecological models have a wide application and are used in scientific research, risk assessments, environmental protection, agriculture and a number of other activities. This thesis presents the results of an operational hydrodynamic and biogeochemical model that are part of the Copernicus system. Changes in the values of various physical and ecological parameters over a period of one month at depths of 1, 50 and 100 m are presented and analyzed. Three points in the Adriatic (northern, middle and southern) were selected and in each of these points the vertical distribution of modeled physical and ecological variables is shown, as well as their time changes from 15th August to 15th September 2020. The modeled physical parameters are in accordance with the climatological values in the Adriatic for the transition period from summer to autumn, and it can be concluded that the model successfully reproduces the physics of the Adriatic. To further confirm the success of the model, it would be necessary to compare the results of the model with the corresponding in situ and satellite data. It is similar for biogeochemical parameters.