Continuing to work on mucilage in the Sea of Marmara on METU’s research ship Bilim-2, Assoc. Dr. Mustafa Yücel said, “The most important finding is that the mucilage is stuck in the first 30 meters. We see that its reproduction and growth has stopped a bit. We obviously foresee that it will stop during the summer.”
METU Marine Sciences Institute’s research ship Bilim-2 sailed to investigate the mucilage formation seen at many points in the Sea of Marmara.
Regarding the latest studies and determinations of the scientific team, which has been working throughout the Marmara Sea for 1 month, Marine Sciences Institute Faculty Member and Institute Deputy Director Assoc. Dr. Mustafa Yucel gave information.
With the octopus, multi-core sampler device and devices with sensors specially developed for deep water on the Bilim-2 ship, it was checked whether the mucilage went down to 100 meters or below in deep waters. The science team studied the effects of the mucilage.
“WE SEE THAT ITS REPRODUCTION AND GROWTH STOPPED Slightly”
Returning to land after their work, Assoc. Dr. Mustafa Yücel said, “The most important finding is that the mucilage is stuck in the first 30 meters. We see that its reproduction and growth has stopped a bit. At least we see that the old 2 weeks ago effect on the surface is gone. The already formed mucilage piles are piled up in the first 30 meters. Our research shows that it does not go down to deeper water, and we recently found that the mucilage layer did not collapse on the deep sea floor,” he said.
“TO STAY IN THE FIRST 30 METERS IS POSITIVE NEWS FOR MARMARA”
Assoc. Dr. Mustafa Yucel spoke as follows:
* On the positive side. The deep water of Marmara, that is, 30-40 meters beyond, has already increased nitrogen phosphorus inputs in the last 30-40 years, and there is very little oxygen left to completely lose its oxygen due to excessive biological production.
* It would be bad if it collapsed into deep water. When mucilage is an organic formation and stops its reproduction, it will consume oxygen from that system for the cost of oxygen. That it does not sink to the bottom and stays in the first 30 meters is positive news for Marmara.
* Marmara is a two-plated sea. A water of 25-30 meters originating from the Black Sea flows towards the Aegean. The water at the bottom does not mix with an older static wall.
* What we can see from the satellite data is that a significant part of these mucilage layers emerge from the Dardanelles towards the Aegean. Of course, this is a risk for the Aegean Sea, but this is a relatively positive development for Marmara.
Saying that they can say, “As long as you stay in the first 30 meters, there is a possibility of exiting the Marmara Sea,” Yücel said, “Another possibility is that if this will deteriorate and the oxygen bill will be charged to us, it is more advantageous for the ecosystem to cut it on the surface. Because the surface is closer to the atmosphere. When the winter season comes, when the mixture starts, there will be oxygen inputs there again, but not to the deep water. Of course, it will cut the oxygen bill, we think it would be better if it cuts it on the surface.”
MUSILAGE MORE IN THE SOUTH
Mustafa Yücel, who also gave information about the mucilage situation in Istanbul, said, “We did not see that the northern part was under a great risk. At least not like the situation a month ago, the mucilage density is actually less on the surface and in the sea, but when you go a little off the coast of Istanbul, when you look at the sea areas in the south of Istanbul, which is not under the influence of the current, the mucilage was there. There is no risk in the Bosphorus and around Istanbul, but mucilage continues in the open. There is still a risk that the mucilage at the bottom will resurface with a change in winds and currents and hit some shores of Istanbul.”
MUSILAGE DOES NOT PROGRESS
Stating that the mucilage did not progress and did not go to the bottom, Assoc. Dr. Mustafa Yücel said, “If there is no new nutrient input, there will be no big rains, terrestrial inputs will not increase the sudden nitrogen phosphorus load, we obviously foresee that it will stop during the summer. The mucilage explosion has taken place in the last 3 weeks as we predicted, but as the summer progresses, we hope that it will cut the oxygen bill so that it cuts it off at the surface. This is a replaceable loan that we can repay. Our biggest goal is not to sink to the bottom,” he said.
SAMPLE TAKEN FROM 1210 METERS
Yücel stated that they extracted a sediment core sample with a special device and this is the first time, “It is an archive. Maybe 20-25 centimeters of the bottom sediment of Marmara is black and the underside is more brown. My first view is that the upper part corresponds to the years when the Marmara Sea was more polluted and started to lose its oxygen. It corresponds to the years when it was cleaner on the upper side. We will look into it, of course the data will show it. I’m sharing this as my first impression. These are archives. Environmental history archive. “The samples taken from 1210 meters, especially from deep water, are very valuable,” he said.
The opinions expressed herein are the author’s and not necessarily those of News2Sea.
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