In studies conducted in the Sea of Marmara by the Faculty of Aquatic Sciences of Istanbul University (IU), it was determined that the conditions for the re-emergence of mucilage occur with increasing water temperature. after warmer weather.
Scientists working at IU’s Faculty of Aquatic Sciences are continuing their studies of mucilage in the Sea of Marmara.
The Anadolu Agency team saw the work of scientists with the R/V research vessel Yunus-S.
The scientists first measured the physico-chemical parameters of the water with the CTD device from the designated stations. By transferring the data from the CTD to the computers, the sampling depths in the sea were determined. Samples were then taken from the upper and lower layers at 15 to 70 meters with Nansen vials and plankton shovels.
Scientists took samples with a trawler to determine the distribution and quantity of creatures on the seafloor. The quantity and weight of the samples separated according to their types on deck were recorded.
“ORGANISMS WILL EXPERIMENT WITH OXYGEN”
IU Faculty of Aquatic Sciences Dean Prof. Dr. Melek İşibili Okyar recalled that the mucilage experienced in the Sea of Marmara last year disappeared like autumn, in a statement to AA correspondent.
Saying that they had received information about mucilage starting to form again in the region in early March and April, Okyar said that in this context, they took samples from the sea with the research vessel R/V Yunus S to determine the situation. .
Stating that they measured physicochemical parameters to reveal the temperature, salinity and oxygen status in the Sea of Marmara, Okyar noted that they took samples of phytoplankton organisms such as microplastics, to see if there is a decrease from the surface to the depths, to determine the latest status of fish stocks and to determine the mucilage.
teacher. Dr. Explaining that they will examine the samples of organisms taken from the lab, Okyar said: “According to the oxygen values given by the physicochemical parameters of the water with the CTD device, we measured the level of oxygen 0.8 to 0.9 under 2 milligrams/liter. This situation will have a very negative effect on living beings. “It will not sustain life. This indicates that the organisms are suffering from a lack of oxygen.” used the expressions.
Pointing out that fish diversity is also not very high, Okyar continued:
“There is a decrease in fish stocks and diversity. We have seen that fish of no economic value and creatures such as sea urchins are extremely dense. According to our observations in the Sea of Marmara, the increase in water temperature with gradually increasing air temperatures can trigger the formation of mucilage.In other words, Sea of Marmara We have seen signs that favor the formation of mucilage in the Sea of Marmara. Currently, the Sea of Marmara is low in oxygen, rich in chlorophyll, and unfortunately the biodiversity is very low.”
“THE INFORMATION THAT THERE IS MUSILAGE AT THE BOTTOM SOUTH OF THE SEA OF MARMARA IS REACHING US”
Stating that mucilage mainly occurs in coastal areas, gulf regions where current and regeneration events are more limited, Okyar pointed out that the gulfs of Izmit, Erdek and Bandırma and southern coasts where people are concentrated can be risky areas.
Pointing out that mucilage first appeared in these regions last year, Okyar said: “We are also receiving information that there is mucilage at the bottom in the southern region of the Marmara Sea. In studies conducted by our professors at our university, during scientific dives around the Princes’ Islands, there was an intense increase in particles at the bottom, but like last year, there was an intense increase in mucilage. that their masses had not formed mentioned.
Stating that Marmara is a sick sea and various studies and efforts are underway to cure it, Okyar said the process will take time.
teacher. Dr. Stressing the importance of acting in a stable way, not giving up and continuing with the decisions taken to save the Sea of Marmara, Okyar said: “Afterwards, we want the Sea of Marmara to come back. in the days when it was rich in biodiversity, where diversity was abundant, we saw tuna, swordfish and mackerel from the Bosphorus were fished with baskets. he said.
“We saw that the sea hedgehog was dominant”
IU Faculty of Aquatic Sciences Dr. Faculty member Uğur Uzer said that they have been following the Sea of Marmara for many years as a university.
Expressing that there are many factors in the formation of mucilage, the most important of which are climate change, fishing, sea pollution and water inflows, Uzer said that they carry out regular studies in the stations determined by the Faculty of Aquatic Sciences.
Stating that water samples taken from certain depths at different times were examined, Uzer gave the following information:
“In our study today, we found that the creature we call the sea hedgehog is dominant. We haven’t seen many of this creature in our studies in this area in previous years. “today’s study we found that the dominant species is the sea hedgehog and the biodiversity is very low. Red mullet and red mullet were encountered in this area, today “We did not encounter any . Very few fish that we call the “Mirlan” came out. Normally, this is the region where they are abundant. We found that horse mackerel and cornflower are very rare. As a university, we constantly observe changes.