Yazar "Aytan, Ülgen" için listeleme
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Are trends in SST, surface Chlorophyll-a, primary production and wind stress similar or different over the decadal scale in the south-eastern Black Sea?
Agırbaş, Ertuğrul; Feyzioğlu, Ali Muzaffer; Aytan, Ülgen; Valente, Andre; Yıldız, İlknur (Cahiers de Biologie Marine, 2015)A 10-year time series of in-situ sea surface temperature (SST), chlorophyll-a concentration and wind stress from 2002 to 2011 was used to examine temporal changes in the South-Eastern Black Sea, together with primary ... -
Beach litter on Saraykoy beach (SE Black Sea): density, composition, possible sources and associated organisms
Aytan, Ülgen; Şahin, Fatma Başak Esensoy; Karacan, Furkan (Central Fisheries Research Inst, 2020)The composition, density and possible sources of litter were seasonally evaluated in a selected beach in the Southeastern Black Sea between June 2016 and March 2017. During the study, 84 different types of litter were ... -
Carbon flow within planktonic food WEB
Aytan, Ülgen (Turkish Marine Research Foundation-Tudav, 2017)In aquatic environment, there are two main pathways by which carbon flows from autotrophic to heterotrophic organisms: the classical herbivorous food web and the microbial food web (Azam et al. 1983, Sherr et al. 1986, ... -
Distribution and composition of seafloor litter and associated macrofouling organisms in the Northeastern Mediterranean Sea
Gönülal, Onur; Dalyan, Cem; Kesici, Nur Bikem; Aytan, Ülgen (Elsevier, 2024)Composition, and density of marine litter and associated macrofouling organisms was assessed in the continental shelf of the Northeastern Mediterranean Sea. A total of 943 litter items weighing 388 kg were collected during ... -
The feeding behaviour of pleurobrachia pileus (ctenophora: tentaculata) in the Southeastern Black Sea: in relation to area and season
Mazlum, Rahşan Evren; Aytan, Ülgen; Ağırbaş, Ertuğrul (Parlar Scientific Publications (P S P), 2018)The diet composition of Pleurobrachia pileus (Muller, 1776) was studied in five stations (Iyidere, Rize, Cayeli, Pazar and Findikli) located along the Southeastern Black Sea coast of Turkey. the diet of P. pileus was also ... -
First evaluation of neustonic microplastics in Black Sea waters
Aytan, Ülgen; Valente, Andre; Şentürk, Yasemen; Usta, Rıza; Şahin, Fatma Başak Esensoy; Mazlum, Rahşan Evren; Ağırbaş, Ertuğrul (Elsevier Sci Ltd, 2016)The Black Sea has a high risk of plastic pollution given the high river discharge of several industrialized countries into this semi-enclosed sea. Here, for the first time, the occurrence and distribution of microplastics ... -
The first evidence of microplastics occurrence in Greater Pipefish (Syngnathus acus Linnaetabus, 1758) in the Black Sea
Şentürk, Yasemen; Emanet, Muhammet; Ceylan, Yusuf; Aytan, Ülgen (Central Fisheries Research Inst, 2023)Microplastics (MPs) occurrence in greater pipefish Syngnathus acus was assessed in the Black Sea for the first time. MPs were found in 21 % of total pipefish examined. MPs were mainly fibres in shape (89 %), black in colour ... -
First occurrence and risk assessment of microplastics in enteral nutrition formulas
Başaran, Burhan; Aytan, Ülgen; Şentürk, Yasemen (Elsevier, 2024)Occurrence and characteristics of microplastics were evaluated in enteral nutrition formulas, for the first time. A total of 30 samples belonging to 9 brands were analysed. Physical and chemical characteristics of microplastics ... -
Güneydoğu Karadeniz Rize Sarayköy Plajında Plastik Kirliliği
Yüksek nehir deşarjına sahip yarı kapalı bir deniz olan Karadeniz’de, çöpler önemli bir çevresel problemdir. Plastik çöpler dünya genelinde olduğu gibi Karadeniz’de de deniz çöplerinin en yaygın olanıdır. Güneydoğu ... -
Güneydoğu Karadeniz’de Noctiluca scintillans (Macartney) Kofoid & Swezy dinamiği ve mesozooplanktona katkısı
Aytan, Ülgen; Şentürk, Yasemen (2018)DOI: 10.26650/ASE201814Son yarım yüzyılda Karadeniz’de zooplankton kommunitelerinde önemli değişimler gözlenmiş, bazı türler hemen hemen kaybolurken, bazı türler artış göstermiştir. Bu türlerden biri olan heterotrofik ... -
Microbial plankton communities in the coastal southeastern Black Sea: biomass, composition and trophic interactions
Aytan, Ülgen; Feyzioğlu, Ali Muzaffer; Valente, Andre; Ağirbaş, Ertuğrul; Fileman, Elaine S. (Polish Acad Sciences Inst Oceanology, 2018)We investigated biomass and composition of the pico-, nano-and microplankton communities in a coastal station of the southeastern Black Sea during 2011. We also examined trophic interactions within these communities from ... -
Microplastic contamination in some beverages marketed in türkiye: Characteristics, dietary exposure and risk assessment
Başaran, Burhan; Aytan, Ülgen; Şentürk, Yasemen; Özçifçi, Zehra; Akçay, Hakkı Türker (Elsevier, 2024)In this study, microplastic contamination in water, natural mineral water and mineral water, sparkling soft drinks, cold tea and some traditional beverages marketed in Türkiye were assessed. Microplastics physically and ... -
Microplastic ingestion and egestion by copepods in the Black Sea
Aytan, Ülgen; Şentürk, Yasemen (Elsevier, 2021)Ingestion and egestion of microplastics by copepods in the Black Sea was assessed for the first time. Composition and concentration of microplastics in the water column was also evaluated. Samples were collected from three ... -
Microplastic pollution in Turkish aquatic ecosystems: Sources, characteristics, implications, and mitigation strategies
Aydın, İlhan; Terzi, Yahya; Gündoğdu, Sedat; Aytan, Ülgen; Öztürk, Rafet Çağrı; Atamanalp, Muhammed; Alak, Gonca; Sivri, Nüket; Akarsu, Ceyhun; Atıcı, Atman Altuğ; Güven, Olgaç; Bat, Levent; Kılıç, Ece; Öztekin, Ayşah; Uçar, Arzu; Sönmez, Vildan Zülal; Paslı, Serap; Kideys, Ahmet E. (Central Fisheries Research Inst, 2023)Aquatic environments are one of the final destinations for microplastics. In this review, a combination of systematic and narrative literature review was conducted to identify and summarise advances, gaps, and future ... -
Microplastics in branded milk: Dietary exposure and risk assessment
Başaran, Burhan; Özçifçi, Zehra; Akçay, Hakkı Türker; Aytan, Ülgen (Elsevier, 2023)In this study, 14 packaged milk of various brands sold in the Türkiye market was examined. The microplastics were physically characterised under the microscope. Their vibrational spectra were recorded with the ATF/FT-IR ... -
Microplastics in honey from Türkiye: Occurrence, characteristic, human exposure, and risk assessment
Başaran, Burhan; Özçifçi, Zehra; Kanbur, Esra Demir; Akçay, Hakkı Türker; Gül, Serkan; Bektaş, Yusuf; Aytan, Ülgen (Elsevier, 2024)In this study, honey samples produced in Türkiye in 2023 were analyzed to assess occurrence of microplastics. The microplastics were physically and chemically characterised by stereomicroscope and FT-IR, respectively. ... -
Plastic occurrence in commercial fish species of the Black Sea
Aytan, Ülgen; Esensoy, Fatma Başak; Şentürk, Yasemen; Arifoğlu, Esra; Karaoğlu, Kaan; Ceylan, Yusuf; Valente, Andre (Central Fisheries Research, 2022)The occurrence of micro- ( 5 mm), meso- (5-25 mm) and macroplastics ( 25mm) was investigated in seven commercial fish species of the Black Sea. Plastics were found in gastrointestinal track of all species analysed: Engraulis ... -
Plastic occurrence in fish caught in the highly industrialized Gulf of Izmit (Eastern Sea of Marmara, Turkiye)
Aytan, Ülgen; Esensoy, Fatma Başak; Şentürk, Yasemen; Güven, Olgaç; Karaoğlu, Kaan; Erbay, Murat (Elsevier, 2023)Occurrence of micro-(<5 mm) and mesoplastics (5-25 mm) in twelve fish species caught off Gulf of Izmit in the Sea of Marmara was investigated. Plastics were found in the gastrointestinal tracks of all the analysed species: ... -
Plastics in an endemic fish species (Alburnus sellal) and its parasite (Ligula intestinalis) in the Upper Tigris River, Türkiye
Aytan, Ülgen; Esensoy, Fatma Başak; Arifoğlu, Esra; İpek, Zeynep Zehra; Kaya, Cüneyt (Elsevier, 2023)Occurrence of micro-, meso- and macroplastics in Alburnus sellal and its parasite Ligula intestinalis is reported for the first time in the Tigris River, one of the two large rivers that defines Mesopotamia. Plastic ... -
Recent occurrence of Olindias muelleri Haeckel, 1879 (Cnidaria, Hydrozoa, Limnomedusae, Olindiidae) in the Aegean Sea
Aytan, Ülgen; Aksu, İsmail; Bektaş, Yusuf (Plankton Soc Japan, 2019)A new occurrence of the hydrozoan Olindias muelleri and the first case of an associated envenomation were recorded from the eastern Aegean Sea. A total of eight adult medusae of O. muelleri were collected near the surface ...
