Tortum Gölü'nün (Erzurum) bentik alg florasının mevsimsel değişimi

Mart 2002-Şubat 2003 tarihleri arasında Tortum Gölü’nün bentik alglerinin kompozisyonu, yoğunluğu ve mevsimsel değişimleri incelenmiştir. Elde edilen veriler 21 yıl önce yapılan araştırmanın sonuçlarıyla karşılaştırılmıştır. Bu araştırmada Navicula capitata var. hungarica (Grunow) Ross, Navicula cryptocephala Kütz., Cymbella affinis Kütz., Amphora ovalis (Kütz.) Kütz., Cocconeis placentula var. euglypta (Ehrenb.) Grunow, Nitzschia sublinearis Hust, Cyclotella krammeri Håk., Merismopedia elegans A. Braun epipelik alg florasında dominant taksonlar olmuştur. Yaz başında ve sonbaharda epipelik florada artış gözlenmiştir. Cymbella affinis, Cymbella lanceolata (Ehrenb.) Kirchner, Fragilaria capucina var. rumpens (Kütz.) Lange-Bert., Cocconeis placentula var. euglypta, Cyclotella krammeri epilitik alg florasında bol ve yaygın bulunan taksonlardır. Spirogyra aequinoctialis G. S. West ise sadece yaz aylarında epilitik florada çok bol olarak bulunmuştur. Bentik alg florasının, gölün organik maddelerle kirlenmesinden etkilendiği sonucuna varılmıştır.

Seasonal changes of the benthic algal flora of Tortum Lake (Erzurum).

Seasonal changes of the benthic algal flora of Tortum Lake (Erzurum). Composition, density and seasonal changes of the benthic algal flora of Tortum Lake were studied between March 2002 and February 2003. The collected data were compared with the data collected 21 years ago. In this study, Navicula capitata var. hungarica (Grunow) Ross, Navicula cryptocephala Kütz., Cymbella affinis Kütz., Amphora ovalis (Kütz.) Kütz., Cocconeis placentula var. euglypta (Ehrenb.) Grunow, Nitzschia sublinearis Hust., Cyclotella krammeri Håk., Merismopedia elegans A. Braun were dominant in the epipelic algal flora. Increases of the flora density were observed during early summer and autumn. Cymbella affinis, Cymbella lanceolata (Ehrenb.) Kirchner, Fragilaria capucina var. rumpens (Kütz.) Lange-Bert., Cocconeis placentula var. euglypta, Cyclotella krammeri were the most abundant and common taxa in the epilithic algal flora. Spirogyra aequinoctialis G. S. West were found in high abundance in the epilithic algal flora only in summer months. We drew a conclusion that the benthic algal flora was affected from organically polluted of the lake.

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