Drilling and core data from the Gulf of Gemlik (SE Sea of Marmara): Holocene fauna and flora assemblages

Year 2020, Volume: 161 Issue: 161, 121 - 149, 15.04.2020

Engin Meriç Zeki Ü. Yümün Atike Nazik , Enis K. Sagular Mehmet Baki Yokeş , Yeşim Büyükmeriç , Ayşegül Yıldız , Gülin Yavuzlar

https://doi.org/10.19111/bulletinofmre.581537

Abstract

This study was conducted to determine fauna and flora assemblages of Holocene sequences from Gemlik Gulf (SE Marmara Sea) and to obtaine their similarities and differences between the assemblages of Gemlik and İzmit Bays. Total of 201 dark gray colored, fine to medium grained sandy clay samples were studied. In the drilled samples, 22 genera and 38 species were identified from the foraminifera characterizing the infralittoral zone. 40 genera and 58 species of foraminifera characterizing the upper circalittoral zone were identified. In addition, Black Sea originated Ammonia parasovica was found for the first time in cores taken from Gemlik Gulf. Nannofossil species characterizing the open-shallow marine environment Emiliania huxleyi, Reticulofenestra parvula, Coronosphaera spp., Syracosphaera spp., Helicosphaera spp. beside Gephyrocapsa oceanica, small Gephyrocapsa spp., Scyphosphaera porosa were obtained. A total of 27 genera and 37 species from ostracods were defined in the samples from gulf. Moreover, the quite abundant mollusc assemblage characterizing the shallow marine environment and fewer genera and species of diatoms were identified. The studied sequence is represented by NN21 Emiliania huxleyi biozone at the Holocene. Foraminifers and ostracods of the Gemlik Gulf are observed as Mediterranean- Aegean Sea originated assemblages. The mollusc shows the shallow marine community.

Keywords

Foraminifer, Ostracod, Mollusc, Nannoplankton, Diatome, Gemlik Gulf

Thanks

The authors would like to thank to Aynur Yümün (Yümün Mühendislik A.Ş.) for providing the drilling and core samples for this study. The authors are also thankful to Prof. Muhittin Görmüş (A.U.), Assoc. Prof. Burçin Aşkım Gümüş and an unknown referee who made significant contributions with their supportive criticism and suggestions during the revision of this article. Also, we would like to thank to Prof Alastair Robertson (The University of Edinburgh) who linguistically improved of last version of the manuscript.

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