Growth responses of a Cylindrotheca closterium strain from the Golden Horn Estuary to temperature, salinity and irradiance

Sebahat Şemin; Seyfettin Taş; Fuat Dursun; Rabia Sezgin; Turgay Durmuş; Muharrem Balcı; Halim Aytekin Ergül

doi:10.12714/egejfas.43.2.05

EN TR

Growth responses of a Cylindrotheca closterium strain from the Golden Horn Estuary to temperature, salinity and irradiance

Abstract

The growth response of a diatom Cylindrotheca closterium strain (DEB132303) isolated from the Golden Horn Estuary (Sea of Marmara) was investigated under different environmental conditions. C. closterium cells were grown in a silica-enriched K-medium under various temperatures (11, 18, 25 and 32°C), salinities (6, 12, 18, 24, 30 and 36 psu) and irradiances (10, 20, 50 and 65 μmol photons m⁻² s⁻¹). By the end of the acclimatization period, no viable C. closterium cells were present at temperatures of 4°C and 32°C and salinities of 6 and 36 psu, which marked the upper and lower boundaries of its environmental tolerance. The maximum specific growth rates (µmax) were 1.45 d⁻¹ at temperature of 18°C (18 psu, 50 μmol foton m⁻² s⁻¹), 1.08 d⁻¹ at salinity of 24 psu ( 18°C, 50 μmol foton m⁻² s⁻¹) and 1.80 d⁻¹ at irradiance of 65 μmol photons m⁻² s⁻¹ (18°C, 18 psu), in temperature, salinity and light experiments, respectively. The maximum cell density (Dmax) was 5×10⁵ cells mL⁻¹ at temperature of 25°C, salinity of 18 psu and irradiance of 50 μmol photons m⁻² s⁻¹. Growth rate varied significantly among different temperature, salinity and irradiance treatments (ANOVA, p<0.001) and there was a positive correlation between growth rate and irradiance (r= 0.98, p<0.01). These results demonstrate that these environmental parameters affect significantly the growth of this C. closterium strain.

Keywords

Supporting Institution

This work was supported by the Scientific Research Projects Coordination Unit of Istanbul University and The Scientific and Technological Research Council of Türkiye (TUBITAK). Project numbers: FBA-2022-39324, FDK-2023-39989 and TUBITAK 1001–121Y389.

Project Number

FBA-2022-39324, FDK-2023-39989 and TUBITAK 1001–121Y389.

Ethical Statement

No specific ethical approval was required for this study.

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Details

Primary Language

English

Subjects

Marine and Estuarine Ecology , Aquaculture

Journal Section

Research Article

Authors

Sebahat Şemin ^*
0000-0002-1411-0089
Türkiye

Seyfettin Taş
0000-0002-4660-3937
Türkiye

Fuat Dursun
0000-0002-7729-5893
Türkiye

Rabia Sezgin
0000-0002-6321-2954
Türkiye

Turgay Durmuş
0000-0002-8242-1823
Türkiye

Muharrem Balcı
0000-0001-9373-6647
Türkiye

Halim Aytekin Ergül
0000-0002-9313-1426
Türkiye

Publication Date

March 31, 2026

Submission Date

January 19, 2026

Acceptance Date

March 23, 2026

Published in Issue

Year 1970 Volume: 43 Number: 2

DOI

https://doi.org/10.12714/egejfas.43.2.05

IZ

https://izlik.org/JA62BZ83LD

Cite

RIS / Bibtex

APA

Şemin, S., Taş, S., Dursun, F., Sezgin, R., Durmuş, T., Balcı, M., & Ergül, H. A. (2026). Growth responses of a Cylindrotheca closterium strain from the Golden Horn Estuary to temperature, salinity and irradiance. Ege Journal of Fisheries and Aquatic Sciences, 43(2), 129-137. https://doi.org/10.12714/egejfas.43.2.05

Growth responses of a Cylindrotheca closterium strain from the Golden Horn Estuary to temperature, salinity and irradiance

Growth responses of a Cylindrotheca closterium strain from the Golden Horn Estuary to temperature, salinity and irradiance

Abstract

Keywords

Haliç'ten elde edilen Cylindrotheca closterium suşunun sıcaklık, tuzluluk ve ışık karşısındaki büyüme tepkileri

Öz

Anahtar Kelimeler

Supporting Institution

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Ethical Statement

References

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Published in Issue

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