Ahmet Erkan Kıdeyş

E-mail

kideys@metu.edu.tr

Department

Graduate School of Marine Sciences

ORCID

0000-0002-1113-2434

Scopus Author ID

6603799069

Web of Science Researcher ID

Q-1824-2015

Antioxidant Capacity and Protein contents of Five Marine Microalgae Yaman, Halil; Eker-Develi, Elif; Keles, Yuksel; Örek, Hasan; Kıdeyş, Ahmet Erkan (2025-01-01) Antioxidant capacity, chlorophyll, marker pigment, and protein contents of four diatoms (Helicotheca tamesis, Haslea silbo, Nitzschia navis-varingica, and Asterionellopsis glacialis) and one cyanobacterium (Spirulina subsa...
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...
Ecological Changes in the Sea of Marmara Işinibilir Okyar, Melek; Kıdeyş, Ahmet Erkan; Malej, Alenka (Istanbul University Press, 2024-09-01) It is with great pleasure and a sense of environmental urgency that we present this com-prehensive volume, “Ecological Changes in the Sea of Marmara.” This collection of papersrepresents a collaborative effort from esteeme...
Macrojellyfish (Scyphozoa and Ctenophora) in Two Enclosed Marine Systems (The Sea of Marmara and Adriatic Sea): A Review Işinibilir Okyar, Melek; Malej, Alenka; Lucic, Davor; Vodopivec, Martin; Violic, Ivana; Karakulak, Firdes Saadet; Kıdeyş, Ahmet Erkan (Istanbul University Press, 2024-01-01) Although geographically well apart, there are interesting similarities between the ecosystems of the Sea ofMarmara and the Adriatic Sea. In this study, following an evaluation of the ecological problems as well asoceanogra...
Changes in the Zooplankton of the Eastern Sea of Marmara Işinibilir Okyar, Melek; Svetlichny, Leonid; Türkeri, Ezgi E.; Topçu Eryalçin, Nur Eda; Kıdeyş, Ahmet Erkan (Istanbul University Press, 2024-01-01) The study conducted in the eastern Sea of Marmara from 2016 to 2022 aimed to investigate the spatio-temporaldistributions of mesozooplankton in relation to changing environmental conditions. A total of 43 zooplankton taxa ...
Temporal and Spatial Variations of Marine Litter Scattered on the Soft Seabed in The Sea of Marmara Yüksek, Ahsen; Karakulak, Firdes Saadet; Kıdeyş, Ahmet Erkan (Istanbul University Press, 2024-01-01) In this study, marine litter from the seafloor in the Sea of Marmara obtained through several trawl surveysbetween 1994 and 2021 is evaluated. When the levels of marine litter on the seabed of the Sea of Marmara areconside...
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...
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...
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...
Effect of Polystyrene Microplastics in Different Diet Combinations on Survival, Growth and Reproduction Rates of the Water Flea (<i>Daphnia magna</i>) İŞİNİBİLİR OKYAR, Melek; ERYALÇIN, Kamil Mert; Kıdeyş, Ahmet Erkan (2023-03-01) Microplastic pollution is a problem not only in the marine environment but also in freshwater ecosystems. Water flea (Daphnia magna) is one of the most common omnivorous cladocerans in freshwater ecosystems. In this study,...

Citation Formats