Seasonal variation in the species composition of the benthic algae of Karagöl Lake was investigated from April to October in 2001 and 2002. The benthic algal flora consisted of 38 taxa belonging to the divisions Chlorophyta, Cyanophyta, Euglenophyta, and Chrysophyta. | Research Article Turk J Bot 33 (2009) 27-32 © TÜBİTAK doi: Benthic Algae (Except Bacillariophyta) and Their Seasonal Variations in Karagöl Lake (Borçka, Artvin-Turkey) Saadet KOLAYLI, Bülent ŞAHİN* Karadeniz Technical University, Fatih Education Faculty, Department of Biology Education, 61335 Söğütlü, Trabzon - TURKEY Received: Accepted: Abstract: Seasonal variation in the species composition of the benthic algae of Karagöl Lake was investigated from April to October in 2001 and 2002. The benthic algal flora consisted of 38 taxa belonging to the divisions Chlorophyta, Cyanophyta, Euglenophyta, and Chrysophyta. In general, Chlorophyta were dominant in terms of species number and abundance during the study period. The distribution range of the benthic algae composition and dominant species differed from each other at all stations. Benthic algal growth was mostly influenced by water temperature and light. Key Words: Benthic algae, seasonal variations, Karagöl Lake Karagöl’ün (Borçka, Artvin-Türkiye) Bacillariophyta Dışındaki Bentik Algleri ve Mevsimsel Değişimi Özet: Karagöl’ün bentik alglerinin kompozisyonundaki mevsimsel değişimler Nisan-Ekim 2001 ve 2002 yıllarında incelenmiştir. Bentik alg florası Chlorophyta, Cyanophyta, Euglenophyta ve Chrysophyta bölümlerine ait toplam 38 taksondan oluşmuştur. Araştırma süresince Chlorophyta tür sayısı ve yoğunluk bakımından dominant olmuştur. Örnekleme istasyonlarındaki alglerin kompozisyonunun mevsimsel dağılım oranları ve dominant türlerin birbirinden farklı olduğu tesbit edilmiştir. Bu araştırmada, su sıcaklığı ve ışık bentik alglerin gelişmesinde etkili olmuştur. Anahtar Sözcükler: Bentik algler, mevsimsel değişim, Karagöl Introduction The importance of benthic algae in shallow lakes has been reported by many researchers (Wetzel, 1964; Moss, 1969; Khonder & Dokulil, 1988). Investigations on the population dynamics, biomass, and production of benthic algae suggest that they .
