Graduate School of Marine Sciences

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Kıdeyş, Ahmet Erkan (168)
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Recent Submissions

Presence of microplastics in human stomachs Özsoy, Sait; GÜNDOĞDU, SEDAT; Sezigen, Sermet; Tasalp, Esra; Ikiz, Durmuş Arinc; Kıdeyş, Ahmet Erkan (2024-11-01) This study presents the first definitive confirmation of microplastic presence in the human stomach, based on samples from 26 cadavers. 97 microplastic particles were extracted from stomach contents, across all 26 individu...
Implementing regional blue economy research and innovation strategies: a case study for the Black Sea Salihoglu, Baris; Yücel, Mustafa; Uygurer, Pinar; Yücel, Ezgi Şahin; Papathanassiou, Evangelos; Tezcan, Devrim; Stanica, Adrian; Stanciu, Irina; Moncheva, Snejana Petrova; Dzhembekova, Nina; Stefanova, Kremena Blagovestova; Komorin, Viktor; Castravet, Tudor; Bilashvili, Kakhaber; Melikidze, Valerian; Gvilava, Mamuka; Kobaidze, Salome (2024-11-01)
Impact of cross-shelf exchange events on eutrophication and primary production variability in the Black Sea Fach Salihoğlu, Bettina Andrea; Arkin, Sinan; Sadighrad, Ehsan; Acar, Ali Osman; Dişa, Deniz; Tezcan, Devrim; Salihoğlu, Barış (2024-10-09) The unique physical and biogeochemical properties of the Black Sea make it difficult to adopt common models that are used to study different seas in the world. It is a major challenge to model in terms of biogeochemistry a...
Greenhouse Gas Dynamics of Saline Lakes: A Study on the Impacts of Environmental Change Yılmaz, Gültekin; Özkan, Korhan; Beklioğlu, Meryem; Department of Oceanography (2024-10-03) Saline lakes, increasingly impacted by climate change and land use, play an important role in the global carbon and nitrogen cycles. This thesis study examined the complex factors influencing greenhouse gas (GHG) emissions...
THE EFFECTS OF MARINE PROTECTED AREAS ON THE ECOSYSTEM IN THE EASTERN MEDITERRANEAN Eşkinat, Deniz; Gücü, Ali Cemal; Department of Marine Biology and Fisheries (2024-9-4) Marine Protected Areas (MPAs) are primary tools for restoring degraded marine ecosystems affected by various stressors. Although numerous studies have acknowledged and demonstrated their effectiveness, their effects and ef...
Investigating the impact of cross-shelf transport and local retention in the Black Sea Rim Current system on small pelagic fishes Fach Salihoğlu, Bettina Andrea; Cagdas, Bulut; Arkin, Sinan S.; Salihoglu, Baris; Tezcan, Devrim (2024-09-01) Advection of pelagicfish larvae through ocean currents is a source of dispersal that is known to structure marine populations by directly impacting population success and persistence. To be able to understandfish populatio...
Causal feedback loops modify lake chlorophyll <i>a</i>-nutrient relationships over two decades of nutrient reductions and climate warming Fu, Hui; Özkan, Korhan; Johansson, Liselotte Sander; Søndergaard, Martin; Lauridsen, Torben Linding; Yuan, Guixiang; Jeppesen, Erik (2024-08-23) Understanding how the causal feedback between phytoplankton and environmental drivers controlling the chlorophyll a (Chl a, as a proxy of phytoplankton biomass)-nutrient relationships are modulated under different ecosyste...
Genetic and Morphological Diversity of Botryllus schlosseri on the Turkish Coast Tohumcu, Begüm Ece; Öztürk, Esra; Karahan, Arzu (2024-07-31) Botryllus schlosseri is a vital model organism in the botryllid ascidian species. It is a crucial reference point for phylogenetic studies due to its ancestral position within the chordate lineage. Despite its acknowledged...
Phytoplankton Patchiness Around the Gksu River Estuary (North-Eastern Mediterranean) Tohumcu, Begüm Ece; Uysal, Zahit (2024-07-29) Göksu river estuary was studied seasonally to reveal impact of contrasting water masseswith varying trophicity on the phytoplankton distribution. Samples were collected fromtotal 51 stations representing nutrient-rich Göks...
Combination of Measurements of the Top Quark Mass from Data Collected by the ATLAS and CMS Experiments at Formula Presented and 8 TeV Hayrapetyan, A.; et. al. (2024-06-28) A combination of fifteen top quark mass measurements performed by the ATLAS and CMS experiments at the LHC is presented. The datasets used correspond to an integrated luminosity of up to 5 and Formula Presented of proton-p...
Thermodynamic Predictions of Hydrogen Generation during the Serpentinization of Harzburgite with Seawater-derived Brines Som, Sanjoy M.; Sevgen, Serhat; Suttle, Adam A.; Bowman, Jeff S.; Schmidt, Britney E. (2024-06-01) Salty aqueous solutions (brines) occur on Earth and may be prevalent elsewhere. Serpentinization represents a family of geochemical reactions where the hydration of olivine-rich rocks can release aqueous hydrogen, H2(aq), ...
Plankton Community Metabolism Variations in Two Temperate Coastal Waters of Contrasting Nutrient Richness Mantıkcı, Asım Mustafa; Bentzon-Tilia, Mikkel; Traving, Sachia J.; Knudsen-Leerbeck, Helle; Riemann, Lasse; Hansen, Jorgen L. S.; Markager, Stiig (2024-06-01) Estuarine ecosystems play a crucial role in global carbon cycling. Understanding the factors controlling plankton metabolism in these regions is critical. This study investigates how contrasting nutrient conditions influen...
Re-oligotrophication and warming stabilize phytoplankton networks Fu, Hui; Cai, Guojun; Özkan, Korhan; Johansson, Liselotte Sander; Søndergaard, Martin; Lauridsen, Torben L.; Yuan, Guixiang; Jeppesen, Erik (2024-04-01) Phytoplankton taxa are strongly interconnected as a network, which could show temporal dynamics and non-linear responses to changes in drivers at both seasonal and long-term scale. Using a high quality dataset of 20 Danish...
Quality matters: Response of bacteria and ciliates to different allochthonous dissolved organic matter sources as a pulsed disturbance in shallow lakes Yalçın, Gülce; Yıldız, Dilvin; Calderó-Pascual, Maria; Yetim, Sinem; Şahin, Yiğit; Parakatselaki, Maria-Eleni; Avcı, Feride; Karakaya, Nusret; Ladoukakis, Emmanuel D.; Berger, Stella A.; Ger, Kemal Ali; Jeppesen, Erik; Beklioğlu, Meryem (2024-03-15) Shallow lake ecosystems are particularly prone to disturbances such as pulsed dissolved organic matter (allochthonous-DOM; hereafter allo-DOM) loadings from catchments. However, the effects of allo-DOM with contrasting qua...
Chapter 6: The Breadth and Limits of Life on Earth Thweatt, Jennifer L.; Harman, C.E.; Araújo, M.N.; Marlow, Jeffrey J.; Oliver, Gina C.; Sabuda, Mary C.; SEVGEN, SERHAT; Wilpiszeki, Regina L. (2024-03-01) Scientific ideas about the potential existence of life elsewhere in the universe are predominantly informed by knowledge about life on Earth. Over the past ∼4 billion years, life on Earth has evolved into millions of uniqu...
Benthic biology influences sedimentation in submarine channel bends: Coupling of biology, sedimentation and flow Azpiroz-Zabala, M.; Sumner, E. J.; Cartigny, M. J. B.; Peakall, J.; Clare, M. A.; Darby, S. E.; Parsons, D. R.; Dorrell, R. M.; Özsoy, Emin; Tezcan, Devrim; Wynn, R. B.; Johnson, J. (2024-01-29) Submarine channels are key features for the transport of flow and nutrients into deep water. Previous studies of their morphology and channel evolution have treated these systems as abiotic, and therefore assume that physi...
THE FUTURE IMPACTS OF CLIMATE CHANGE ON FISH STOCKS IN THE BLACK SEA: AN END-TO-END MODEL APPROACH Uysaler, Hacer Buse; Akoğlu, Ekin; Department of Marine Biology and Fisheries (2024-1-23) The warming of the Black Sea significantly affects the marine ecosystem, fish populations, and livelihoods. Comprehensive models that make assessments about the past, present, and predictions concerning future changes of m...
Evidence for the Higgs Boson Decay to a Z Boson and a Photon at the LHC Aad, G.; et. al. (2024-01-12) The first evidence for the Higgs boson decay to a Z boson and a photon is presented, with a statistical significance of 3.4 standard deviations. The result is derived from a combined analysis of the searches performed by t...
Coastal discharge extremes and their environmental impact on the Sea of Marmara Başdurak, Nüvit Berkay (2024-01-01) Increases in evaporation driven by global warming change the hydrological cycle by fueling extreme precipitation and exacerbating the frequency and intensity of extreme floods. Combined with the increase in terrestrial was...
Evaluating Sea Level Rise Impacts on the Southeastern Türkiye Coastline: a Coastal Vulnerability Perspective Aykut, Fahri; Tezcan, Devrim (2024-01-01) Coastal areas are inherently sensitive and dynamic, susceptible to natural forces like waves, winds, currents, and tides. Human activities further accelerate coastal changes, while climate change and global sea level rise ...

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