Graduate School of Marine Sciences, Thesis

Item Usage Stats

Browse

Search within this collection:

Filters

Entity Type
Thesis (172)

Has File(s)
Yes (100)
No (72)

Author
Akçay, İsmail (3)
Akkuş, Gizem (2)
Akoğlu, Ekin (2)
Avşar, Dursun (2)
Gücü, Ali Cemal (2)

Subject
Natural Sciences (43)
Black Sea (11)
Engineering and Technology (10)
Marine resources. (7)
Fishes (6)

Date Issued
1980 - 1989 (37)
1990 - 1999 (32)
2000 - 2009 (30)
2010 - 2019 (42)
2020 - 2026 (22)

Item Type
Master Thesis (127)
Ph.D. Thesis (45)

Recent Submissions

TROPHIC IMPACTS OF POISONOUS AND VENOMOUS LESSEPSIAN FISH SPECIES IN THE NORTHEASTERN LEVANTINE SEA: A COMPARATIVE FOOD-WEB MODELLING APPROACH Uysal, Aybüke; Akoğlu, Ekin; Department of Marine Biology and Fisheries (2026-1-21) The construction of the Suez Canal in 1869 permanently altered the biogeographic isolation of the Mediterranean Sea, triggering the ongoing influx of Indo-Pacific species known as Lessepsian migrants. In the Eastern Medite...
SALINIZATION AND WARMING EFFECTS ON ZOOPLANKTON COMMUNITY IN MEDITERRANEAN SHALLOW LAKES: A MESOCOSM EXPERIMENT Kuyumcu, Meltem; Özkan, Korhan; Department of Marine Biology and Fisheries (2025-12-1) Freshwater ecosystems in Mediterranean climate zones are increasingly impacted by climate change. Altered precipitation patterns, together with elevated evaporation rates, reduce lake water volumes and consequently increas...
COMPOSITION AND STRATIGRAPHY OF SEDIMENTARY PIGMENTS IN ALPINE LAKES OF TAURUS MOUNTAINS, TÜRKİYE Arslan, Hasan; Özkan, Korhan; Department of Marine Biology and Fisheries (2025-11-28) Anatolia features extensive mountainous regions with numerous alpine lakes, and its sedimentary records have strong potential to reveal climatic and ecological changes. Here we present the first extensive survey of the Ala...
SPATIOTEMPORAL DYNAMICS OF CARBONATE CHEMISTRY IN RIVER AND GROUNDWATER INPUTS TO THE NORTHEASTERN MEDITERRANEAN COAST Ayar, Yeşim; Özhan, Koray; Özkan, Korhan; Department of Oceanography (2025-11-12) Freshwater inputs onto coastal regions play a critical role in shaping marine carbonate chemistry, nevertheless their influence remains undefined in many semi-enclosed seas. This study presents the first comprehensive asse...
MODELLING DISPERSAL AND CONNECTIVITY OF ANTARCTIC KRILL IN THE LAZAREV SEA AND ADJACENT SEAS Çağdaş, Bulut; Fach Salihoğlu, Bettina Andrea; Department of Oceanography (2025-9-1) The zooplankton species Antarctic krill, Euphausia superba, is a key organism in the Southern Ocean ecosystem that is recognized as a main component of the Antarctic marine food web. Antarctic krill is distributed all arou...
A Bathymetric And Seismic Investigation Of Submarine Landslides In The Southwestern Black Sea Şimşek, Şeval; Tezcan, Devrim; Department of Oceanography (2025-8-15) Submarine landslides are one of the important geological processes that shape the seafloor and can cause significant hazards in marine environments. This study investigates submarine landslides in the southwestern Black Se...
ANOXYGENIC PHOTOSYNTHESIS IN THE BLACK SEA: DISTRIBUTION PATTERNS OF GREEN SULFUR BACTERIA USING PIGMENT-BASED APPROACHES Gülmez, Zeray Ayral; Yücel, Mustafa; Department of Oceanography (2025-8) Anoxygenic photosynthesis is an ancient biogeochemical pathway and a still potentially significant mechanism in some of the anoxic-sulfidic (euxinic) marine and lake ecosystems. A representative of this metabolism thrives ...
Seasonal and regional dynamics of carbonate chemistry and buffering capacity in contrasting marine systems: The Northeastern Mediterranean and The Sea of Marmara Alemdar, Polen; Özhan, Koray; Department of Oceanography (2025-8) This thesis investigates seasonal and spatial variability in carbonate system dynamics and buffering capacity across two contrasting semi enclosed Turkish seas: the oligotrophic Northeastern Mediterranean and the eutrophic...
Variations in the Demersal Fishes of the Northeastern Mediterranean Over the Last 40 Years in Relation to Environmental Factors Kurt, Merve; Gücü, Ali Cemal; Department of Marine Biology and Fisheries (2025-7-04) The Mediterranean Sea has undergone substantial ecological transformations driven by climate change, overfishing, and the continuous introduction of non-indigenous species (NIS) through the Suez Canal. These stressors ofte...
OCEAN ACIDIFICATION AND ANTHROPOGENIC CARBON IN THE EASTERN MEDITERRANEAN SEA AND THE EFFECTS OF ACIDIFICATION ON MARINE ORGANISMS Kocaman, Emel; Özhan, Koray; Ibello, Valeria; Department of Chemical Oceanography (2025-2-27) Ocean acidification (OA), driven by rising atmospheric carbon dioxide (CO2) levels, is a critical issue affecting our oceans. The Eastern Mediterranean Sea (EMS) remains poorly understood in terms of the carbonate system 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...
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...
The Effects of The Environment on The Black Sea Anchovy - Signals on The Growth Akkuş, Gizem; Gücü, Ali Cemal; Department of Marine Biology and Fisheries (2023-9-08) The Black Sea anchovy, Engraulis encrasicolus (Linnaeus, 1758), is a fast-growing, short-lived small pelagic fish species. This fish stands out economically as it alone accounts for more than 60% of the total landings in t...
PELAGIC PLANKTON NET COMMUNITY PRODUCTION AND RESPIRATION IN THE SEA OF MARMARA KAZAK, MELİKE; Yücel, Mustafa; Mantıkcı, Asım Mustafa; Department of Marine Biology and Fisheries (2023-8-28) Respiration is a critical process in biological pump with primary production. This study quantified net community production (NCP) and community respiration (CR) for stations selected from various locations in the Sea of M...
ESTIMATING SUBMARINE GROUNDWATER DISCHARGE IN THE CILICIAN BASIN BY RADIOACTIVE ISOTOPE TRACERS AND HYDRODYNAMIC MODELING Kuyumcu, Burak; Akoğlu, Ekin; Özkan, Korhan; Department of Oceanography (2023-7-26) The Northeastern Levantine Sea has an oligotrophic nature, however, rising agricultural and industrial activities along its coasts pose a major eutrophication risk. There is a urgent necessity to identify and assess coasta...
Seafloor Iron Mobilization Across The Deep-Water Redox Gradients Of The Black Sea And The Sea Of Marmara Alımlı, Nimet; Yücel, Mustafa; Department of Chemical Oceanography (2022-8) Iron is one of the key elements in the ocean which has wide interconnections with other essential elements (i.e., C, N, P, O, Mn, S) and fundamental mechanisms (i.e., photosynthesis, respiration, chemosynthesis). The criti...
INVESTIGATION OF BACTERIAL COMMUNITY COMPOSITION IN OXIC AND ANOXIC SEDIMENT CORES ALONG REDOX GRADIENTS OF THE BLACK SEA Esti, Mertcan; Yücel, Mustafa; Karahan, Arzu; Department of Oceanography (2022-5-18) Biogeochemical cycles are essential for the maintenance of life on Earth. However, little is known about the underlying processes, which hinders the estimation of future states of cycles in a changing environment. Microorg...
COASTAL EUTROPHICATION AND HYPOXIA UNDER FOCUS: REDOX DEPENDENT BENTHIC NUTRIENT FLUXES ACROSS SEA BOUNDARIES IN THE NORTHEASTERN MEDITERRANEAN AND MARMARA SEA Akçay, İsmail; Yücel, Mustafa; Department of Oceanography (2022-2-8) Seafloor biogeochemistry can dramatically shift in response to deoxygenation and eutrophication-driven organic carbon production. In such conditions, biogeochemical cycling of key nutrients can be highly coupled to oxygen ...
GEOCHEMISTRY OF DEEP-SEA HYDROTHERMAL VENT FLUIDS FROM BROKEN SPUR, RAINBOW AND LOST CITY HYDROTHERMAL VENT FIELDS, MID-ATLANTIC RIDGE Sevgen, Serhat; Yücel, Mustafa; Department of Oceanography (2021-5-21) Mid- Atlantic Ridge (MAR) is a very special tectonic environment which contains compositioanlly distinct hydrothermal vent fields as a result of its slow spreading character. Considering the increasing efforts on understan...

Citation Formats