We cannot assess the situation. The problem is the lack of relevant data.

We cannot assess the situation. The problem is the lack of relevant data.

1003/5000 The only area for which we can say that there have been permanent changes of somewhat larger dimensions is the inner part of the Bay of Koper. It covers ~ 4 km2 of water surface. Twenty-four-hour current measurements in the Bay of Koper showed very complex tidal dynamics of water masses. At low tides, the water flow brings fresh, sea water in the middle of the bay, while at the sides the water leaves the bay (Orlando Bonaca et al., 2011), while at higher tides fresh water flows into the bay from the northwest and flows on the southwest side. However, it is not clear whether this flow has a significant impact on the area in front of the Port of Koper and whether such circulation is present throughout the year. Increasingly pronounced water heating in the spring and summer is becoming the rule and brings new challenges. The lack of oxygen in the bottom layer is not problematic for once, but the response of organisms to increased temperatures is uncertain. An uncontrolled intake of nutrients, however, could completely change the summer situation.

The heavily altered water body in the central part of the Bay of Koper is the result of hydrological changes in the past. The essence of these changes were changes to the coastal strip with the erection and construction of facilities along the coast and embankment, and on the other hand the deepening of certain parts of the bay. The crimson material excavated during the deepening of the navigable canals into the port was mostly deposited on land near the coast, and part of it filled the former shallower parts of the coast at the mouth of the Rižana River. This changed the entire ecosystem in the coastal strip in the inner part of the semi-enclosed Bay of Koper. The regulation of the Rižana riverbed, on the other hand, introduced changes in the input of fresh water into the marine water body. The entry of the Rižana River also has a torrential character, as most of the river's water is separated and intended for water supply. In the interior of the bay in the coastal part, the water layer is quite homogeneous in stable weather conditions, and during the transition of weather fronts, due to precipitation and fresh water intake, most of the bay in the layer up to 1 m below the surface is filled with sweetened water. The exchange time of 2.2 to 6 days still allows for good enough conditions so that the condition does not deteriorat

Permanent changes of slightly larger dimensions in the inner part of the Bay of Koper place the area in a strongly transformed water body. It covers ~ 4 km2 of water surface. This fact alone indicates that there have been lasting changes in the composition of benthic organisms.

Permanent changes of slightly larger dimensions in the inner part of the Bay of Koper place the area in a strongly transformed water body. It covers ~ 4 km2 of water surface. This fact alone indicates that there have been changes in functional groups.

5-25%

5-25%

5-25%

Unknown_NotAssessed

Unknown_NotAssessed

Permanent hydrographic changes in the interior of the Bay of Koper and especially in the waters along the Port of Koper lead to changes in the circulation of fresh sea water and a changed regime of fresh water and nutrient intake. The growth trend of summer temperatures in the semi-enclosed Bay of Koper, which has been ~ 0.15 ° C / year for the last 17 years (Orlando Bonaca et al., 2011), may lead to changes in oxygen saturation at the bottom in the warmest decade or two. part of the flight. This, in turn, means a further deterioration of the situation for organisms living at or on the seabed. The inflow of fresh, fresh water is also reduced in summer, and an increase in temperature may further reduce the solubility of oxygen in water. Possible additional hydrographic changes may have a similar effect on the ecological situation in all semi-enclosed bays along the Slovenian coast (Piran Bay, the bay in front of Strunjan.)

Permanent hydrographic changes in the interior of the Bay of Koper and especially in the waters along the Port of Koper lead to changes in the circulation of fresh sea water and a changed regime of fresh water and nutrient intake. The growth trend of summer temperatures in the semi-enclosed Bay of Koper, which has been ~ 0.15 ° C / year for the last 17 years (Orlando Bonaca et al., 2011), may lead to changes in oxygen saturation at the bottom in the warmest decade or two. part of the flight. This, in turn, means a further deterioration of the situation for organisms living at or on the seabed. The inflow of fresh, fresh water is also reduced in summer, and an increase in temperature may further reduce the solubility of oxygen in water. Possible additional hydrographic changes may have a similar effect on the ecological situation in all semi-enclosed bays along the Slovenian coast (Piran Bay, the bay in front of Strunjan.)

Permanent hydrographic changes in the interior of the Bay of Koper and especially in the waters along the Port of Koper lead to changes in the circulation of fresh sea water and a changed regime of fresh water and nutrient intake. The growth trend of summer temperatures in the semi-enclosed Bay of Koper, which has been ~ 0.15 ° C / year for the last 17 years (Orlando Bonaca et al., 2011), may lead to changes in oxygen saturation at the bottom in the warmest decade or two. part of the flight. This, in turn, means a further deterioration of the situation for organisms living at or on the seabed. The inflow of fresh, fresh water is also reduced in summer, and an increase in temperature may further reduce the solubility of oxygen in water. Possible additional hydrographic changes may have a similar effect on the ecological situation in all semi-enclosed bays along the Slovenian coast (Piran Bay, the bay in front of Strunjan.)

Permanent hydrographic changes in the interior of the Bay of Koper and especially in the waters along the Port of Koper lead to changes in the circulation of fresh sea water and a changed regime of fresh water and nutrient intake. The growth trend of summer temperatures in the semi-enclosed Bay of Koper, which has been ~ 0.15 ° C / year for the last 17 years (Orlando Bonaca et al., 2011), may lead to changes in oxygen saturation at the bottom in the warmest decade or two. part of the flight. This, in turn, means a further deterioration of the situation for organisms living at or on the seabed. The inflow of fresh, fresh water is also reduced in summer, and an increase in temperature may further reduce the solubility of oxygen in water. Possible additional hydrographic changes may have a similar effect on the ecological situation in all semi-enclosed bays along the Slovenian coast (Piran Bay, the bay in front of Strunjan.)