2014 Cilt 8 Sayı 24

Permanent URI for this collectionhttps://hdl.handle.net/11452/17020

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Browsing by Author "Gönülol, Arif"

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    Phytoplankton community, functional classification and trophic state indices of Yedikır dam lake (Amasya)
    (Uludağ Üniversitesi, 2014-12-23) Maraşlıoğlu, Faruk; Gönülol, Arif
    Functional classification, Trophic Status and composition of phytoplankton in Yedikır Dam Lake were studied between October 2004 and April 2006. Although Chlorophyta and Bacillariophyta were dominant in respect to species numbers, Cyanophyta and Chlorophyta type phytoplankton were registered in terms of population density in Yedikır Dam Lake. According to an average chlorophyll a concentration of 16 μg L-1 , Dam Lake belongs to the eutrophic level of the trophic scale. A total of 126 phytoplankton species were identified in the study period, belonging to 18 functional groups. The seasonal succession of dominant functional groups followed this sequence of coda: B (Cyclotella), F (Kirchneriella), J (Crucigenia), H1 (Anabaena, Aphanizomenon), LO (Merismopedia), and W2 (Trachelomonas). Trophic state indices derived from chlorophyll a and transparency, were close together, but both were above the phosphorous index. Values of trophic state indices rank the Yedikır Dam Lake as being eutrophic. According to the some functional groups and indices the phytoplankton biomass in Dam Lake is probably limited by low phosphorus, low light and low nutrients.