Investigations on the zooplankton distribution and composition of Işıklı Lake (Çivril-Denizli/Türkiye), with a trophic status assessment

Meral Apaydın Yağcı; Rahmi Uysal; Abdulkadir Yağcı; Vedat Yegen

doi:10.12714/egejfas.41.1.01

EN TR

Investigations on the zooplankton distribution and composition of Işıklı Lake (Çivril-Denizli/Türkiye), with a trophic status assessment

Abstract

In this study, the zooplankton distribution and composition of Işıklı Lake, located in the Inner West Anatolia region of Türkiye, were examined monthly between 2003-2005. Zooplankton samples were collected with Hydro-Bios plankton net (55 µm) at the surface and fixed in formaldehyde (4%). Physiological parameters such as surface water temperature, pH, dissolved oxygen, and conductivity were also measured. Also, the frequency index (F %) and the Brachionus / Trichocerca (QB/T) were determined to assess the trophic composition of Lake Işıklı. A total of 49 species have been identified. Rotifera (55%), Cladocera (27%) and Copepoda (18%) were represented by the species. The maximum species was found in May 2004 (21 species), while the minimum was found in October 2003 (5 species). Asplanchna priodonta, Keratella cochlearis, Keratella tecta, Polyarthra dolichoptera, Synchaeta pectinata, Bosmina longirostris and Chydorus sphaericus are common species in the lake. The water temperature varied between 3.9-24.6 °C; pH ranged from 8.1 to 8.8; the electrical conductivity ranged from 341 µS/cm to 434 µS/cm; the dissolved oxygen values changed from 5.8 mg/L to 11.1 mg/L. According to the frequency index (F %), the most dominant species are B. longirostris (74 %), K. cochlearis (62 %), A. priodonta (54 %), and C. sphaericus (51 %). A total of 20 species are reported for the first time from the region. Newly reported species from the lake were: the rotifers, A. priodonta, Brachionus angularis, Brachionus calyciflorus, Colurella colurus, Keratella quadrata, Lecane clostrocerca, Lecane ludwigi, Lecane luna, Lecane lunaris, Lecane ohioensis, Lecane quadridentata, Lecane sp., Mytilina mucronata, Notholca acuminata, Notholca squamula, Trichotria tetractis, the cladocerans Acroperus harpae, Daphnia cucullata, and the copepods Eucyclops macrurus and Megacyclops gigas. Considering the Brachionus / Trichocerca (QB/T) ratio according to the Sládeček (1983) index, the lake showed mesotrophic features.

Keywords

Işıklı Gölü (Çivril-Denizli/Türkiye) zooplankton dağılımı ve kompozisyonunun trofik durum değerlendirmesi ile araştırılması

Öz

Bu çalışmada Türkiye'nin İç Batı Anadolu bölgesinde yer alan Işıklı Gölü'nün zooplankton dağılımı ve kompozisyonu 2003-2005 yılları arasında aylık olarak incelenmiştir. Zooplankton örnekleri yüzeyden Hydro-Bios plankton ağı (55 µm) ile toplanmıştır ve formaldehit (% 4) içerisine sabitlenmiştir. Yüzey suyu sıcaklığı, pH, çözünmüş oksijen ve elektriksel iletkenlik gibi bazı fizikokimyasal parametreler de ölçülmüştür. Ayrıca Işıklı Gölü'nün trofik kompozisyonunu değerlendirmek amacıyla frekans indeksi (% F) ve Brachionus / Trichocerca (QB/T) belirlenmiştir. Toplam 49 tür tespit edilmiştir. Rotifera (%55), Cladocera (%27) ve Copepoda (%18) türleri tarafından temsil edilmiştir. Maksimum tür Mayıs 2004'te (21 tür), minimum tür ise Ekim 2003'te (5 tür) bulunmuştur. Asplanchna priodonta, Keratella cochlearis, Keratella tecta, Polyarthra dolichoptera, Synchaeta pectinata, Bosmina longirostris ve Chydorus sphaericus gölde yaygın olarak görülen türlerdir. Su sıcaklığı 3,9-24,6 °C arasında; pH 8,1 ila 8,8 arasında; elektriksel iletkenlik 341 µS/cm ile 434 µS/cm arasında; çözünmüş oksijen değerleri 5,8 mg/L'den 11,1 mg/L'ye kadar değişmiştir. Sıklık indeksine (% F) göre en baskın türler B.longirostris (%74), K. cochlearis (%62), A. priodonta (%54) ve C. sphaericus (%51)'dur. Bölgeden ilk kez toplam 20 tür rapor edilmiştir. Gölde yeni bildirilen türler: rotifera, A. priodonta, Brachionus angularis, Brachionus calyciflorus, Colurella colurus, Keratella quadrata, Lecane clostrocerca, Lecane ludwigi, Lecane luna, Lecane lunaris, Lecane ohioensis, Lecane quadridentata, Lecane sp., Mytilina mucronata, Notholca acuminata, Notholca squamula, Trichotria tetractis, cladocera Acroperus harpae, Daphnia cucullata ve copepoda Eucyclops macrurus ve Megacyclops gigas. Sládeček (1983) indeksine göre Brachionus / Trichocerca (QB/T) oranı dikkate alındığında; göl mezotrofik özellik göstermiştir.

Anahtar Kelimeler

Supporting Institution

There is no specific funding for this research.

Ethical Statement

Ethics Committee approval certificate is not required for invertebrates. For this reason, Ethics Committee Certificate was not obtained in this study.

Thanks

We would like to express our deepest gratitude to the Fisheries Research Institute of Eğirdir-Isparta, Türkiye, for their support during the field sampling.

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Details

Primary Language

English

Subjects

Hydrobiology , Freshwater Ecology , Conservation and Biodiversity , Limnology

Journal Section

Research Article

Authors

Meral Apaydın Yağcı ^*
0000-0002-2108-1853
Türkiye

Rahmi Uysal
0000-0002-7342-9380
Türkiye

Abdulkadir Yağcı
0000-0002-7897-1734
Türkiye

Vedat Yegen
0000-0001-5349-1497
Türkiye

Early Pub Date

March 11, 2024

Publication Date

March 15, 2024

Submission Date

September 15, 2023

Acceptance Date

November 22, 2023

Published in Issue

Year 2024 Volume: 41 Number: 1

DOI

https://doi.org/10.12714/egejfas.41.1.01

IZ

https://izlik.org/JA25PW88HA

Cite

RIS / Bibtex

APA

Apaydın Yağcı, M., Uysal, R., Yağcı, A., & Yegen, V. (2024). Investigations on the zooplankton distribution and composition of Işıklı Lake (Çivril-Denizli/Türkiye), with a trophic status assessment. Ege Journal of Fisheries and Aquatic Sciences, 41(1), 1-7. https://doi.org/10.12714/egejfas.41.1.01