Graduate School of Marine Sciences, Article

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Kıdeyş, Ahmet Erkan (98)
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Tuğrul, Süleyman (35)

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Recent Submissions

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...
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...
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...
Development and testing of a prototype indicator-based tool for identification of potential problem areas for marine litter in Europe's seas
Murray, Ciarán J.; van Bavel, Bert; Kıdeyş, Ahmet Erkan; Lusher, Amy L.; Reker, Johnny; Šubelj, Gašper; Andersen, Jesper H. (2023-12-20)
We demonstrate a prototype multi-metric indicator-based assessment tool (i.e. Marine Litter Assessment Tool - MALT) for mapping and identification of ‘problem areas’ and ‘non-problem areas’ regarding the occurrence of mari...
Phytoplankton and pigment composition during an Emiliania huxleyi bloom in the Black Sea
Eker-Develi, Elif; Konucu, Merve; Psarra, Stella; Slabakova, Natalia; Triantaphyllou, Maria; Dimiza, Margarita; Karageorgis, Aristomenis P.; Uysal, Zahit; Berthon, Jean-François (2023-12-10)
Alterations in composition and carbon biomass of phytoplankton community are closely related to seasonal variations, anthropogenic inputs and ultimately climatic changes in a longer perspective. Accuracy of the collected d...
A local eddy viscosity parameterization for wind-driven estuarine exchange flow, Part II: Entrainment
Başdurak, Nüvit Berkay; Burchard, Hans; Schuttelaars, Henk M. (2023-12-01)
Structure and intensity of estuarine exchange flow depend significantly on the eddy viscosity Av profile which is dynamically linked to various forces (e.g., gravitational, tidal, wind-driven). The impact of winds on the e...
Shifts in the pelagic fishery dynamics in response to regional sea warming and fishing in the Northeastern Mediterranean
Demirel, Nazlı; Akoğlu, Ekin; Yıldız, Taner (2023-12-01)
Understanding the dynamics of pelagic fish fluctuations is crucial to ecosystem well-being and sustainable fishery. Here, inter- and intra-annual landing dynamics of small and medium pelagic fish were delineated between 20...
Appraising the characteristics of particulate matter from leather tanning micro-environments, their respirational risks, and dysfunctions amid exposed working cohorts
Sarwar, Fiza; Alam, Khan; Öztürk, Fatma; Koçak, Mustafa; Malik, Riffat Naseem (2023-12-01)
Leather tanneries are known for chemical laden work environments and pulmonic complaints among workers. This study presents an analysis of tannery micro-environments emphasizing on size-based variation in composition of pa...
Establishment of Stable Genetic Transformation Conditions for Novel Thermotolerant Scenedesmus sp. (Chlorophyta)
Akın, Dilan; Sönmez, Çağla; Yücel, Mustafa; Öktem, Hüseyin Avni (2023-11-01)
Microalgae became an attractive source of high value compounds such as fatty acids, carotenoids and other nutrients in recent years. In a previous study, the characterization of a novel thermo-tolerant freshwater microalga...
Water chemistry and pigment composition of 13 lakes and ponds in Maritime Antarctica
Özkan, Korhan (2023-11-01)
The Antarctic Peninsula has been rapidly warming, resulting in changes to the abundance and surface cover of terrestrial aquatic ecosystems, as well as their ecosystem structure and function. Therefore, comparative studies...
Microplastic distribution in the surface water and sediment of the Ergene River
Akdogan, Zeynep; Guven, Basak; Kıdeyş, Ahmet Erkan (2023-10-01)
Rivers are major transport pathways for microplastics to reach the oceans. Although gained much attention over the last few years, there is still a relatively lack of knowledge on microplastics in rivers. This study aims t...
Seven ascidian (Tunicata) species from the North Eastern Mediterranean
Karahan, Arzu (2023-10-01)
Members of the tunicates, a subphylum of marine filter-feeder chordates, inhabit all marine and oceanic habitats from the subtidal to the abyssal. Considered the closest relatives to the vertebrates, the tunicates are wide...
First maturity size of the Black Sea anchovy and its implications on the age-based stock assessment models
Akkuş, Gizem; Gücü, Ali Cemal (2023-10-01)
This study aims to estimate the Black Sea anchovy's first maturity length and its relationship with the ambient temperature to investigate possible consequences of global warming on the stock. The study also evaluated how ...
Abundance and composition of polycyclic aromatic hydrocarbons in the surface sediments of twelve alpine lakes in the Central Taurus Mountains
Yakan Dündar, Sevil Deniz; Çelik, İmran Eren; Özkan, Korhan (2023-08-01)
The regions of Bolkar Mountains and Aladağlar accommodate a unique ecosystem in Turkey, due to being in a transitional climate between the continental and the Mediterranean and hosting alpine lakes which are considered as ...
Ocean carbon from space: Current status and priorities for the next decade
Brewin, Robert J.W.; et. al. (2023-05-01)
The ocean plays a central role in modulating the Earth's carbon cycle. Monitoring how the ocean carbon cycle is changing is fundamental to managing climate change. Satellite remote sensing is currently our best tool for vi...
Comparison of Diffusive and Total Nutrient Fluxes from the Sediment of Mersin Bay, Northeastern Mediterranean Sea
Akçay, İsmail (2023-04-01)
In this study, sediment diffusive and total nutrient fluxes were calculated for the Mersin Bay, Northeastern (NE) Mediterranean Sea. Positive fluxes of nutrients from the sediments indicated that sediment acts as a source ...
Distinct patterns of sedimentary phosphorus fractionation and mobilization in the seafloor of the Black Sea, Marmara Sea and Mediterranean Sea
Akçay, İsmail; Yücel, Mustafa (2023-03-10)
Phosphorus (P) is a key element to all life that is used for structural and functional component of all organisms. The cycling of sedimentary P may differ depending on the redox-conditions of the overlying waters affecting...
Differences in food web structure and composition between new and nearby older lakes in West Greenland suggest succession trajectories driven by glacier retreat
Jeppesen, Erik; Davidson, Thomas A.; Meerhoff, Mariana; De Meester, Luc; Gonzalez-Bergonzoni, Ivan; Vidal, Nicolas; Arndt, Hartmut; Juergens, Klaus; Sommaruga, Ruben; Özkan, Korhan; Lauridsen, Torben L.; Tserenpil, Sh (2023-03-01)
With the retreat of glaciers, new ponds and lakes are often formed. These are gradually colonised and become more productive as vegetation develops in their catchments, creating more complex food webs. Near the Jakobshavn ...
Morphology, Molecular Genetics and Potential Importance for Mucilage Events of the New Coccolithophorid Ochrosphaera neapolitana in the Sea of Marmara
Eker-Develi, Elif; Tekdal, Dilek; Demet, Atıf Emre; Yıldız, Hüseyin Bekir; Kıdeyş, Ahmet Erkan (2023-03-01)
The coccolithophorid Ochrosphaera neapolitana was reported for the first time from samples obtained during a large-scale mucilage event in the Sea of Marmara in May 2022 in a previous study. We also found this species in o...
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